460 results about "Mg alloys" patented technology

The invention discloses composite powder, a metal anti-corrosion coating composition, a preparation method of the metal anti-corrosion coating composition and a metal anti-corrosion method. Zn < 2 + > and imidazole ligands are self-assembled on the surface of GO in situ in DMF to prepare composite powder with stable pore channels and barrier and self-repairing functions, and the composite powder is dispersed in an epoxy matrix to prepare the coating. When the coating is damaged, the MOF releases Zn < 2 + > to form a passive film with the ligand, and the GO network delays medium diffusion and enhances mechanical properties. And the coating has remarkable salt mist resistance and self-repairing performance, and is suitable for corrosion prevention of metals such as steel, aluminum-magnesium alloy and the like.

The invention relates to the technical field of rotary furnaces, in particular to a continuous feeding and discharging rotary furnace for rare earth silicon magnesium alloy preparation, which comprises a bottom table and a barrel rotationally mounted on the bottom table, and further comprises a feeding mechanism, and the feeding mechanism comprises a feeding pipe fixedly mounted on the bottom table and positioned on the left side of the barrel; a plurality of spiral augers are evenly installed in the feeding pipe in the circumferential direction, and the feeding pipe is provided with a rotating assembly used for driving the spiral augers to rotate and a distance adjusting assembly used for periodically adjusting the distance between every two adjacent spiral augers along with rotation of the rotating assembly. Raw materials are conveyed into the barrel through mutual cooperation of the rotating assembly, the distance adjusting assembly and the anti-clamping assembly, in the feeding process, the distance adjusting assembly can periodically adjust the distance between the adjacent spiral augers along with rotation of the spiral augers, and the situation that the raw materials are clamped in the conveying process is prevented.

The invention relates to the technical field of metal material processing engineering, discloses a full-automatic full-process modeling method and system of crystal plasticity finite element model for laser welding weld, which adopts MATLAB to call ABAQUS and PYTHON for co-simulation programming. In this text, a full-automatic modeling method of the crystal plasticity finite element model for laser welding weld is proposed, and a one-key crystal plastic finite element model for laser welding weld is established based on EBSD experimental data. In addition, the full-process full-automatic modeling method of crystal plastic finite element for laser welding weld is universal, and can be used for the establishment of the crystal plasticity finite element model for the microstructure of the base material of aluminum alloy, titanium alloy, magnesium alloy, stainless steel and other materials.

The invention discloses a low-cost, flame-retardant, high-strength, high-thermal-conductivity and corrosion-resistant Mg-Al-Ca-Mn alloy and a preparation method thereof, relates to an Mg-Al-Ca-Mn alloy and a preparation method thereof, and aims to solve the problem that an existing magnesium alloy is difficult to meet the requirements of high plasticity, corrosion resistance, thermal conductivity and flame resistance at the same time. The invention provides a low-cost, high-strength, corrosion-resistant, heat-conducting and flame-retardant Mg-Al-Ca-Mn-X alloy, X is one or a combination of more of Y, Gd, La, Ce, Sm and Nd according to any ratio, the microstructure of the alloy is regulated and controlled through alloy component optimization, rare earth microalloying, a heat treatment process and a plastic deformation process, and the mechanical property of the alloy is improved. The alloy prepared by the invention has excellent mechanical property, corrosion resistance, heat-conducting property and flame retardant property. The method is applied to the field of metal materials.

The invention discloses a multifunctional coating with a compact-porous double-layer structure on the surface of magnesium alloy and a preparation method, and belongs to the technical field of biological materials. According to the multifunctional coating, magnesium alloy serves as a substrate, a compact layer and a porous layer are sequentially stacked from the substrate to the outside, and the compact layer is composed of two-dimensional transition metal carbide / nitride, calcium silicate nanowires and a positively charged polymer. The porous layer is composed of copper-containing complex / biopolymer composite fibers, mineralized silk fibers loaded with bioactive metal ions and astragalus polysaccharide on the surface, and natural polymers. According to the multifunctional coating with the compact-porous double-layer structure prepared on the surface of the magnesium alloy, the porous layer on the surface layer has a unique porous structure, growth and proliferation of osteoblasts can be well promoted, meanwhile, the multifunctional coating has the characteristics of pressure resistance, bacteria resistance and oxidation resistance, the compact layer on the bottom layer can improve the corrosion resistance of the magnesium alloy, and the service life of the magnesium alloy is prolonged. The coating is particularly suitable for surface coating of magnesium alloy implant materials and can be used in the field of medical instruments.

The invention discloses a nanocarbon-copper heterogeneous interface construction method for improving the electromagnetic shielding and heat-conducting properties of a graphene / magnesium composite material and a composite material based on the nanocarbon-copper heterogeneous interface construction method, and belongs to the technical field of heterogeneous interfaces. The method comprises the following steps: mixing intrinsic graphene, a surfactant and a foaming agent, performing ultrasonic dispersion treatment in solvent water, and performing freeze drying to obtain an intrinsic graphene preform; performing chemical vapor deposition on the intrinsic graphene preform serving as a substrate, and performing in-situ deposition of nanocarbon on the surface of the intrinsic graphene preform to obtain an intrinsic graphene-nanocarbon preform; a copper-containing oxidizing agent and a reducing agent are added into ethyl alcohol for ultrasonic treatment, an ethyl alcohol solution is obtained, the intrinsic graphene-nanocarbon prefabricated body is added into the ethyl alcohol solution, standing and drying treatment are conducted, then heat treatment is conducted, and an intrinsic graphene-multi-dimensional nanocarbon-nanocopper prefabricated body is obtained; and heating is conducted under argon protection, a magnesium alloy matrix is placed on the intrinsic graphene-multi-dimensional nano carbon-nano copper prefabricated body for liquid-solid infiltration extrusion, and the intrinsic graphene reinforced magnesium-based composite material is obtained. The method is used for solving the problems that existing intrinsic graphene of a three-dimensional network structure cannot have excellent electromagnetic shielding performance and heat-conducting performance at the same time, and existing magnesium-based composite materials only conduct single electromagnetic shielding performance or heat-conducting performance regulation and control.

The invention discloses a magnesium alloy corrosion resistance prediction method based on machine learning, and relates to the technical field of metal material performance prediction.The method comprises the following steps that magnesium alloy corrosion resistance data are obtained and preprocessed, and a magnesium alloy data set is obtained; aiming at a random forest algorithm and a gradient boosting tree algorithm, training, optimizing and evaluating the prediction model by using the magnesium alloy data set to obtain an optimal prediction model; and for the optimal prediction model, inputting components and environmental parameters of the magnesium alloy, and outputting a corrosion resistance prediction value. According to the method, the prediction precision and the material design efficiency can be remarkably improved, the method is suitable for biomedical application of orthopedic implants, intravascular stents and the like, and an efficient and reliable technical path is provided for research and development of the degradable magnesium alloy.

The utility model discloses an electromagnetic compatibility assessment device, and belongs to the technical field of wireless communication. The equipment comprises a data processing module, a signal generator module, a low-frequency / high-frequency amplifier, a combining unit, a shielding frame and a power supply module, and accurate evaluation of the electromagnetic compatibility of the weak current equipment is realized through modular design. The signal generator module adopts a multi-band vector signal generator to generate configurable interference signals; the low-frequency amplifier and the high-frequency amplifier respectively adopt independent high-precision amplification circuits; and the combining unit couples the two paths of signals into a composite interference signal and outputs the composite interference signal. The shielding frame is made of double-layer aluminum magnesium alloy and is combined with a metal machine frame to form a composite shielding system. And the data processing module regulates and controls parameters in real time through the touch screen, analyzes response data of the tested equipment based on an FFT algorithm, and generates a visual evaluation report.

The invention discloses an ultrahigh-strength heat-resistant Mg-Gd-Y-Zn-Zr-Yb wrought magnesium alloy and a high-temperature extrusion forming process thereof, and relates to the technical field of non-ferrous metal materials and processing thereof.The ultrahigh-strength heat-resistant Mg-Gd-Y-Zn-Zr-Yb wrought magnesium alloy is prepared from, by mass, 8.96 wt%-9.33 wt% of Gd, 3.72 wt%-4.12 wt% of Y, 1.17 wt%-1.25 wt% of Zn, 0.24 wt%-0.35 wt% of Zr, 0.23 wt%-0.53 wt% of Yb and the balance Mg and inevitable impurities; the high-temperature extrusion forming process comprises the following steps of preparation of a high-quality casting blank through a semi-continuous casting technology, high-temperature long-time solution treatment, high-temperature reverse extrusion and isothermal aging treatment. Wherein high-temperature backward extrusion is carried out at 400 DEG C, the extrusion ratio is about 7, quenching is carried out in cold water after extrusion, and then aging treatment is carried out; according to the ultrahigh-strength heat-resistant rare earth magnesium alloy prepared through the high-temperature backward extrusion forming technology, the yield strength is larger than or equal to 456MPa, the tensile strength is larger than or equal to 509MPa, and the ductility is larger than or equal to 4.3%; the ultrahigh-strength heat-resistant magnesium extrusion rod is of great significance in promoting the application of magnesium alloy in the high-tech fields of aerospace, national defense and military industry and the like.

The invention belongs to the field of bladder cancer treatment, and particularly relates to a drug delivery system based on combination of a biodegradable magnesium alloy stent and a double-J tube. The system comprises a biodegradable magnesium alloy stent and a double-J tube, the surface of the biodegradable magnesium alloy stent is modified by a calcium phosphate coating to form a fine needle-shaped micro-nano structure, and the biodegradable magnesium alloy stent loads an anti-cancer drug oridonin. The biodegradable magnesium alloy stent loaded with oridonin is accurately attached to a tumor part by means of ultrasonic guidance, and the double-J tube and the biodegradable magnesium alloy stent are combined for use. According to the invention, the loading efficiency of the hydrophobic drug is improved through the modification of the micro-nano structure of the calcium phosphate coating, and the anti-tumor effect of the magnesium degradation product is cooperated, so that the problems of high frequency, high toxicity and poor compliance of traditional bladder cancer perfusion treatment and difficulty in delivery of Ori and other natural drugs are solved, and finally, accurate, long-acting and low-toxicity treatment of bladder cancer is realized.

The present invention discloses a reverse design method for high-performance magnesium alloys based on machine learning. By collecting data on the composition, processing technology and mechanical properties of magnesium alloys, the implicit structure-activity relationship of the composition, processing technology and mechanical properties of magnesium alloys is analyzed by machine learning algorithms, thereby realizing efficient design of new high-performance magnesium alloys based on mechanical performance requirements. The present invention combines an optimization algorithm with a forward model to optimize parameters such as alloy composition, effectively improve the accuracy of prediction (the calculation accuracy can reach 99%), reduce deviations (the error is only 0.5%), and can achieve good fitting effects even with a small amount of alloy data and complex process combinations. The calculation method is simple and easy to implement. The present invention improves the design efficiency of magnesium alloys, reduces experimental costs, and is a reverse design guided by actual performance requirements. It not only solves the problem of small amount of magnesium alloy data, but also provides a new idea for the efficient development and design of high-performance magnesium alloys based on machine learning methods.

This invention relates to the field of magnesium primary battery preparation technology, and discloses a magnesium aqueous primary battery system, including a positive electrode, a negative electrode, and an electrolyte. The negative electrode is any one of magnesium metal and magnesium alloy. The positive electrode is made of a positive electrode active material, superconducting carbon, and a first-order gelatinizing agent. The electrolyte is made of magnesium bromide, a corrosion inhibitor, and a second-order gelatinizing agent. The preparation method includes the following steps: S1: preparing a positive electrode slurry; S2: preparing an electrolyte by introducing a corrosion inhibitor into the magnesium bromide electrolyte, followed by adding a second-order gelatinizing agent for gelatinization treatment to obtain a slow-release gelatinized electrolyte; S3: preparing a positive electrode steel shell; S4: assembling the battery. The technical solution of this invention not only slows down the corrosion rate of the negative electrode material and improves the utilization rate of the negative electrode material, but also solves the problems of voltage hysteresis and volume expansion during battery discharge; furthermore, it can match the reaction rates of the positive and negative electrodes.

The present invention provides a high-strength heat-resistant magnesium alloy with multiple precipitation phases and a preparation method thereof. The magnesium alloy is an Mg-A-B alloy, and the composition expression of the multiple precipitation phases is A x MgB y (where x and y are equal to 1 or 2), where both A and B are alloy element sets; according to the elements contained in the element sets and the precipitation phases of different lattice types formed by them, it can be specifically divided into face-centered cubic A2MgB type, face-centered cubic AMgB2 type, orthorhombic lattice AMgB type, hexagonal lattice AMgB type, and tetragonal lattice A2MgB2 type multiple precipitation phase strengthened magnesium alloys. The designed Mg-A-B alloy contains at least 5 elements; its microstructure has the following characteristics: (1) Nano-scale A x MgB y multiple precipitation phases are formed in the Mg matrix, and the average equivalent size is ≤20 nm; (2) A x MgB y multiple precipitation phases are not easily coarsened in a high-temperature environment, and the thermal stability of the alloy microstructure is strong. The room-temperature yield strength of the age-hardened peak-state magnesium alloy of the present invention is 300-550 MPa, the tensile strength is 350-600 MPa, and the elongation after fracture is 5-40%.

The invention provides a high-toughness austenitic stainless steel welding rod for 5Ni steel and a preparation method of the high-toughness austenitic stainless steel welding rod. The welding rod comprises a core wire and a coating coated on the surface of the core wire, and based on the total amount of the core wire, the core wire comprises the following components in percentage by mass: less than or equal to 0.09% of C, less than or equal to 0.15% of Si, 1.6-2.5% of Mn, 18.5-20.5% of Cr, 12.5-14.5% of Ni, 2.1-3.2% of Mo and 0.06-0.18% of Ti; 0.12-0.24% of Al, less than or equal to 0.007% of S, less than or equal to 0.008% of P, less than or equal to 0.006% of O, less than or equal to 0.001% of H, less than or equal to 0.012% of S + P, and the balance Fe and inevitable impurities. On the basis of the total amount of the coating, the coating comprises, by mass, 28-38% of carbonate, 15-20% of fluorite, 1-3% of lithium fluoride and sodium fluoride, 8-12% of synthetic mica, 3-6% of potassium silicotitanate, 2-4% of zircon sand, 9-15% of electrolytic manganese metal, 2-4% of ferrotitanium, 2-5% of passivated nickel-magnesium alloy, 1-3% of atomized ferrosilicon, 1-3% of lanthanum cerium fluoride, 1-3% of tungsten and molybdenum, 3-5% of nitrided ferrochromium and 1-2% of CMC. The welding rod is good in all-position welding controllability, extremely low in air hole sensitivity and excellent in low-temperature toughness, and can meet the requirements for high-quality and efficient welding of 5Ni steel.

The invention relates to the technical field of metal surface modification, in particular to a magnesium alloy anticorrosive coating and a preparation method and application thereof. The method comprises the following steps: firstly, performing micro-arc oxidation treatment on magnesium alloy to form a substrate layer; then, the micro-arc oxidation coating is subjected to hole sealing treatment through dendritic mesoporous silica loaded with a corrosion inhibitor, and the self-repairing function is given to the micro-arc oxidation coating; then, a layered self-similar coating composed of dendritic mesoporous silica loaded with a corrosion inhibitor and a resin matrix is constructed on the surface of the hole sealing layer, and interface bonding and compactness are enhanced; finally, dendritic mesoporous silica, cellulose nanocrystals, 1H, 1H, 2H, 2H-perfluorodecyl triethoxy silane, organic resin and tetraethoxy silane are introduced, and the super-hydrophobic coating with a micro-nano composite firm structure is formed on the surface layer. The obtained magnesium alloy anti-corrosion coating integrates the characteristics of long-acting corrosion resistance, super-hydrophobicity, self-repairing, high mechanical stability and the like, and the technical problems that a traditional magnesium alloy anti-corrosion coating is prone to physical or chemical damage and insufficient in durability are effectively solved.

The invention discloses a magnesium-titanium composite material with an interpenetrating phase structure for bone implantation, the magnesium-titanium composite material is formed by interpenetrating a reinforced phase made of a titanium alloy material and a matrix phase made of magnesium or a magnesium alloy material, and the reinforced phase and the matrix phase are respectively kept continuous in a three-dimensional space; a reinforcing phase and a matrix phase of the magnesium-titanium composite material have gradient structures in the radial direction; the invention further discloses a preparation method of the interpenetrating phase structure magnesium-titanium composite material for bone implantation. According to the magnesium-titanium composite material disclosed by the invention, the structure is designed into a structure in which the reinforcing phase and the matrix phase are three-dimensionally continuous and interspersed with each other and the two phases are in gradient in the radial direction, so that the magnesium-titanium composite material implant and healthy bone tissue at a bone defect part of a patient realize good biomechanical adaptation; the material is suitable for being used as a bone implant in the field of biomedical metal materials.

The invention discloses a composite coating modified medical magnesium matrix and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a silane hydrolysis solution with a nano calcium carbonate suspension to obtain a mixed solution; soaking the medical magnesium matrix pretreated by the layered double hydroxide coating in the mixed solution for 1-5 minutes, and then quickly taking out; and heating the impregnated medical magnesium matrix at the temperature of 80-150 DEG C to 45-80 DEG C to obtain the modified medical magnesium matrix. Firstly, a layered double hydroxide coating is generated on the surface of medical magnesium or magnesium alloy through a hydrothermal method, and then a nano calcium carbonate composite silane coating is prepared on the layered double hydroxide coating, so that the corrosion resistance of a matrix is improved, and meanwhile, due to compounding of nano calcium carbonate, the biocompatibility and osteogenesis performance of the matrix are improved.

The application discloses an amorphous silicon dioxide coating prepared based on micro-arc oxidation, a preparation method and application thereof, and belongs to the technical field of metal surface protection and silicon dioxide coating. In the application, a magnesium alloy, an aluminum alloy, a titanium alloy, a titanium-aluminum base and a nickel-aluminum base are used as anodes and are placed in a micro-arc oxidation tank, a hydrolytic solution of organic silicon is used as an electrolyte, and an amorphous silicon dioxide coating with a thickness of more than 100 mu m can be prepared within 20 minutes through a step-by-step step-incremental constant potential control means. The application utilizes the advantages of the micro-arc oxidation process and the sol-gel process, avoids their shortcomings, and realizes the superimposed synergistic effect of "1+1>2". The process steps of the application are simple, and the application is very suitable for full-automatic operation and processing in industry. The amorphous silicon dioxide coating with the required thickness, wear resistance, corrosion resistance, erosion resistance, oxidation resistance and other characteristics can be prepared by changing the electrolyte concentration, the micro-arc oxidation time and the electric control parameters, or through the conventional micro-arc oxidation constant voltage and constant current control means.

The invention relates to the field of medical instruments and public health, in particular to an artificial blood vessel with anticoagulation, endothelium promotion and bending resistance functions and a preparation method of the artificial blood vessel, and the artificial blood vessel is used for various blood vessel replacement and blood vessel bypass operations and has the characteristics of anticoagulation, endothelium promotion and bending resistance. The copper-containing material and the degradable magnesium-based metal material are respectively integrated on the inner surface of the artificial blood vessel and in the interlayer of the vessel wall, so that the functions of anticoagulation, endothelium promotion and bending resistance of the artificial blood vessel are realized. According to the artificial blood vessel with the anticoagulation, endothelium promotion and bending resistance functions, in the initial stage of use, due to the spiral structure of the magnesium alloy wire, the blood vessel cannot collapse after being bent, the blood flow is kept smooth, copper ions, magnesium ions and a small amount of hydrogen can be released to surrounding tissues in the use process, the microenvironment of the surrounding tissues is adjusted to be alkalescent, and the blood circulation is kept smooth. Through the synergistic effect of the copper ions and the magnesium alloy, the effects of promoting endothelialization, resisting blood coagulation and adjusting the acid-base property of the microenvironment are achieved at the same time, and therefore the functions of resisting blood coagulation, promoting endothelium and resisting bending are achieved.

The invention discloses a corrosion-resistant and collagen-functionalized magnesium-based metal coating and a preparation method of the corrosion-resistant and collagen-functionalized magnesium-based metal coating. Belongs to the technical field of biomedical material preparation. The preparation method comprises the following steps: firstly introducing hydroxyl into the surface of the magnesium alloy through alkali treatment, then sequentially dipping the magnesium alloy into a solution A and a solution B containing specific copolymers, drying to obtain an anti-corrosion coating, and finally coating with a recombinant humanized collagen solution. The copolymer A in the solution A and a magnesium substrate form a firm Si-O-Mg covalent bond through a silane coupling agent, and the fluorine-containing copolymer B in the solution B is tightly combined with a bottom layer through self-assembly, so that a super-hydrophobic anti-corrosion barrier with a stable structure and strong adhesion is constructed. The outermost collagen layer endows the magnesium alloy material with excellent endothelial cell adhesion and proliferation promoting activity. The multi-layer composite coating structure effectively solves the problems that magnesium alloy degradation is too fast, and an existing coating is weak in binding force and lacks biological functions, and has wide application prospects in implantable medical devices such as intravascular stents.

The invention relates to the cross technical field of material calculation and machine learning, and discloses a magnesium alloy grain boundary segregation site determination method based on a physical information graph neural network, and the method comprises the following steps: extracting initial geometric structure information of a target grain boundary site and adjacent atoms thereof, and obtaining feature vectors of initial nodes and edges; performing message passing on the initial node and the edge feature vector based on a mathematical analysis form and an update function embedded with physical information to obtain an updated node feature vector; carrying out aggregation processing on the updated node feature vectors to generate a grain boundary structure descriptor used for representing the local atomic environment of the grain boundary site; and inputting the grain boundary structure descriptor into a pre-trained machine learning regression model to obtain a solute segregation performance predicted value of the target grain boundary site. According to the method, the calculation of segregation energy is converted into efficient machine learning prediction from high-cost physical simulation, and the calculation efficiency is greatly improved.

The utility model discloses an anti-corrosion structure of an electrical equipment shell and an electric drive assembly, and relates to the technical field of anti-corrosion, the electrical equipment shell comprises a first shell and a second shell, the first shell and the second shell are made of different metal materials, and the first shell is made of magnesium alloy; the anti-corrosion structure comprises a first flow guide part and a second flow guide part, the first flow guide part is arranged at the bottom of the first shell in the using state, and the second flow guide part is arranged on the side face of the electrical equipment shell in the using state. According to the utility model, through the first flow guide piece and the second flow guide piece, the salt mist liquid can be prevented from being gathered at the joint surfaces of the first shell and the second shell, so that the corrosion condition is reduced. Therefore, the anti-corrosion performance of the electrical equipment shell can be improved.

A sensor can include a functional surface that includes a magnesium alloy. The function surface can have a fluorescence enhancing microstructure formed by electrochemical corrosion of the magnesium alloy at the functional surface. A method of forming the sensor can include providing a precursor substrate having a magnesium alloy surface, and electrochemically treating the magnesium alloy surface in the presence of an electrolyte to electrochemically corrode the surface.

The invention discloses a magnesium alloy micro-arc oxidation electrolyte which comprises sodium metaaluminate, sodium hydroxide, sodium fluoroaluminate, aluminum fluoride and glycerol. The content of sodium metaaluminate is 5-25 g / L, the content of sodium hydroxide is 1-3 g / L, the content of sodium fluoroaluminate is 0.3-0.7 g / L, the content of aluminum fluoride is 0.2-0.3 g / L, and the content of glycerol is 1 g / L. The magnesium alloy micro-arc oxidation electrolyte comprises potassium metaaluminate, potassium hydroxide, potassium fluoroaluminate, aluminum fluoride and glycerol, the content of potassium metaaluminate is 10-20 g / L, the content of potassium hydroxide is 3-5 g / L, the content of potassium fluoroaluminate is 0.5-0.7 g / L, the content of aluminum fluoride is 0.3-0.5 g / L, and the content of glycerol is 1 g / L. The invention further discloses the magnesium alloy hard ceramic membrane and a preparation method thereof. According to the preparation method of the magnesium alloy hard ceramic film, the components and the microstructure of the magnesium alloy micro-arc oxidation film layer are changed, and meanwhile the hardness and the corrosion resistance of the magnesium alloy micro-arc oxidation film layer are improved.

The present application provides an orthopedic implant or a component thereof comprising a biodegradable magnesium alloy comprising magnesium and Ca in the range of 0.550 to 0.700 wt%, Zn in the range of 0.400 to 0.700 wt%, and 50 ppm or less Fe, the biodegradable magnesium alloy consisting of two phases comprising a first phase and a second phase having a higher electrochemical activity than the first phase, the first phase comprises magnesium and Zn, and the second phase comprises Mg2Ca precipitates greater than nanoscale. The present application also provides a method of making a biodegradable magnesium alloy, a method of making an orthopedic implant or component thereof, and a method of treating a subject in need of therapy for a medical condition of bone.

The invention relates to an advantageous composition for its use in a glass manufacturing process, comprising (i) at least a calcium raw material and (ii) at least a calcium-magnesium raw material, with when CaO is ≥ 4*MgO in said composition, said calcium-magnesium raw material is hydrated dolime; and when CaO is < 4*MgO in said composition, said calcium raw material is hydrated lime.

The invention discloses a preparation method of a hydrogen-responsive composite multilayer magnesium-based film surface self-wrinkle pattern. The preparation method comprises the following steps: A, preparing a polymer elastic layer on the surface of a supporting substrate; b, depositing a plurality of layers of metal-based films on the polymer elastic layer by adopting a magnetron sputtering method; and C, exposing the prepared sample in a hydrogen-containing atmosphere, and forming a wrinkle pattern of which the recognizable size is in a range of 10nm-1000mu m on the surface through hydrogenation reaction at normal temperature. According to the method, the surface of the thin film can be deformed by exposing the thin film to the hydrogen-containing atmosphere environment, so that the three-dimensional wrinkle texture can be quickly realized, and the three-dimensional wrinkle morphology can be accurately regulated and controlled by adjusting the element components, sputtering time, sputtering power, working gas flow and hydrogen treatment parameters of the magnesium or magnesium alloy hydrogen-sensitive reaction film layer. The pattern features of the prepared wrinkle pattern can be recognized through characterization means such as an optical microscope, a scanning electron microscope, an atomic force microscope or a diffraction light-variable device.

This invention provides a magnesium anode material with a dislocation density gradient structure based on asynchronous rolling, its preparation method, and its application, relating to the field of anode material technology. The magnesium anode material of this invention is prepared by raw material melting and casting, solution treatment, extrusion molding, and asynchronous rolling. The magnesium anode material includes no more than 0.1 wt.% zirconium, with the balance being magnesium and unavoidable impurities. The dislocation density of the magnesium anode material increases gradient from the surface to the core. This invention introduces a dislocation density structure with a gradient from the surface to the core into magnesium alloy sheets through asynchronous rolling, thereby obtaining a magnesium anode material with both high discharge activity and good corrosion resistance, improving its overall discharge performance in magnesium-air batteries. The preparation process of the magnesium anode material of this invention is simple, highly controllable, and easy to scale up, possessing good industrialization potential.

The utility model discloses an anti-corrosion device for the inner wall of a desulfurizing tower. The anti-corrosion device comprises a base, a shell, an inner barrel, an anode block, a wire coil and a rectifier, an annular insulating seat is arranged on the base, a plurality of anode blocks are arranged in the insulating seat, mounting holes are formed in the periphery of the insulating seat, mounting rods are arranged on the base of the inner barrel, the inner barrel is fixed in the mounting holes through the mounting rods, and a plurality of grooves corresponding to the anode blocks are formed in the bottom of the inner barrel; the outer shell is vertically welded to the edge of the outer side of the base. Anticorrosion treatment is carried out on the inner wall of the desulfurizing tower through a cathode protection method of sacrificial anodes and a cathode protection method of impressed current, two kinds of metal with different activities are connected, namely, the outer side of an inner barrel is sleeved with a sleeve made of magnesium alloy, the sleeve is connected with a wire coil, and the magnesium alloy sleeve with the high activity loses electrons and is corroded; and the inner barrel wall with poor activity obtains electrons, so that the inner barrel wall is protected.

This invention provides a micro-arc oxidation electrolyte for magnesium alloy surface treatment and a method for preparing a micro-arc oxidation film. The micro-arc oxidation electrolyte is an aqueous solution containing sodium silicate, sodium hydroxide, potassium fluoride, and titanium boron carbon nitride conductive nanoparticles; or, an aqueous solution containing sodium silicate, potassium hydroxide, potassium fluoride, and titanium boron carbon nitride conductive nanoparticles. This invention also discloses a method for preparing a micro-arc oxidation film using the aforementioned micro-arc oxidation electrolyte for magnesium alloy surface treatment. The micro-arc oxidation electrolyte of this invention contains conductive ceramic nanoparticles—titanium boron carbon nitride conductive nanoparticles. Using these nanoparticles to perform a micro-arc oxidation reaction on the magnesium alloy surface can improve the microstructure of the micro-arc oxidation film, while simultaneously enhancing the corrosion resistance and wear resistance of the magnesium alloy after micro-arc oxidation treatment, significantly improving the surface protection capability of the magnesium alloy, and extending its service life.