172 results about "Ternary alloy" patented technology

The invention discloses a preparation process of a high-performance Cu-Ni-Fe alloy calculated and designed based on a first principle, and relates to the technical field of alloy material preparation. According to the process, a precise Cu-Ni-Fe ternary alloy thermodynamic database is constructed by combining a first principle with a CALPHAD method, a multivariate phase diagram is calculated based on the database to determine a component range, then optimized components of a work function, an elastic constant and a thermal expansion coefficient are calculated through the first principle, and a finished product is obtained through smelting, heat treatment and forming machining. The final alloy is composed of, by atomic percent, 30%-75% of Cu, 10%-30% of Ni and 10%-30% of Fe, the tensile strength is larger than or equal to 816.4 MPa, the total elongation at break is larger than or equal to 34.27%, the thermal expansion coefficient is smaller than 20 * 10 <-6 > / K, the excellent mechanical property and thermal stability are achieved, the problems that component design is blind and performance fluctuation is large in a traditional process are solved, and the alloy is suitable for the fields of ocean engineering, electronic packaging and the like.

The invention discloses a nano-alloy catalyst for anion exchange membrane electrolyzed water and a preparation method of a membrane electrode of the nano-alloy catalyst, when any one of manganese salt, cerium salt, chromium salt, cobalt salt, lanthanum salt, ruthenium salt and iridium salt is not added, NiFe binary alloy powder is obtained, the content of Ni is 90%-100%, and the content of Fe is 0%-10%; when any one of manganese salt, cerium salt, chromium salt, cobalt salt, lanthanum salt, ruthenium salt and iridium salt is added, NiFe ternary alloy powder is obtained, the content of Ni is 76%-96%, the content of Fe is 4%, and the content of the third element is 0%-20%. The nano-alloy catalyst material for anion exchange membrane water electrolysis prepared according to the invention is good in corrosion resistance and high in stability, the total water splitting efficiency is further improved, the synthesis method is simple, the used metal salt is low in cost, the metal salt can be uniformly loaded on a substrate carrier through spraying, and industrial application of total water splitting under high current density is easy to realize.

The invention discloses an AuAgPt ternary alloy nano-framework, a preparation method thereof and application of the AuAgPt ternary alloy nano-framework in anti-tumor preparations, and belongs to the field of biomedical nano-materials. The AuAgPt ternary alloy nano frame is a hollow octahedral nano frame formed by 12 AuAgPt ternary alloy edges, and the nano frame has plasmon photothermal conversion performance, catalase activity and peroxidase-like activity, and can be used for preparing the nano frame. The aptamer has the characteristics that the aptamer can form a covalent bond with glutathione (GSH), the aptamer with the framework surface capable of being modified and specifically bound with tumor cells is used for tumor targeted delivery and the like, the aptamer can be bound in a targeted manner and internalized into the tumor cells, and after near-infrared laser irradiation, the cell temperature can be increased to 42 DEG C, reactive oxygen species (ROS) can be generated, GSH can be consumed, and the tumor targeting effect is achieved. In addition, the content change of small molecule metabolites in cells can be driven through a low-temperature photothermal effect, the metabolic state is disturbed, the redox balance in the cells is destroyed, the tumor cells are induced to generate ferroptosis and apoptosis, and the low-temperature photothermal treatment of tumors is realized.

The invention relates to a PEM ternary alloy catalyst for water electrolysis hydrogen production and a preparation method thereof, and belongs to the technical field of water electrolysis catalysts. 1-butyl-3-methylimidazolium tetrafluoroborate is introduced in the generation of a carrier manganese dioxide to increase the specific surface area of the carrier, fluorine doping and oxygen vacancy construction are realized on the surface of the carrier through hydrofluoric acid treatment, and then a metal precursor is dispersed through an ethylene glycol / water system; and finally, loading and alloying of the alloy nanoparticles are completed through hydrothermal reduction and heat treatment. The morphology and electronic structure of the carrier are synergistically regulated and controlled through ionic liquid and fluorine doping, the specific surface area and active sites are remarkably increased, strong interaction of metal and the carrier is achieved through ternary alloy component optimization, and the oxygen evolution reaction activity and stability of the catalyst and the precious metal utilization rate are effectively improved.

The invention discloses a design method and a preparation method of low-melting-point high-entropy liquid metal GaInSnBiZn, and belongs to the field of alloy research and development. The liquid metal alloy is formed by mixing five metal elements including Ga, In, Sn, Bi and Zn according to the equal atomic proportion, and aims at avoiding formation of intermetallic compounds and optimizing the microstructure through the high-entropy effect, and low melting point, high stability and good mechanical property of the alloy are achieved. The mixing enthalpy of the binary alloy and the formation enthalpy of the ternary alloy are calculated, thermodynamic analysis and phase diagram research are combined, the proportion of the five elements is determined, the high-entropy alloy is prepared through a vacuum arc melting method under the high vacuum condition, and the high purity and stability of the high-entropy alloy are ensured. The liquid alloy is low in melting point and high in stability, theoretical guidance and technical support are provided for design and preparation methods of novel liquid metal materials, some limitations in the prior art are overcome, and the liquid alloy has high practical application value.

The invention discloses a high-strength and high-plasticity low-melting-point aluminum alloy brazing material and a preparation method and application thereof, and relates to the technical field of solder manufacturing. The low-melting-point aluminum alloy welding flux is prepared from the following components in percentage by weight: 10 to 14 percent of Si, 4 to 20 percent of Cu, 0.04 to 0.25 percent of Eu, 0.78 to 0.82 percent of Fe, 0.13 to 0.17 percent of Mn, 0.08 to 0.12 percent of Mg, 0.18 to 0.22 percent of Zn and the balance of aluminum and inevitable impurities. The Al-Si-Cu ternary alloy is constructed to form a low-melting-point eutectic phase, the melting point of the material is effectively reduced, meanwhile, Eu atoms are doped, the aluminum matrix is subjected to the pressure stress effect, the interplanar spacing is reduced, the grain size of the matrix aluminum phase is reduced, the elemental Si phase is refined, the eutectic Al-Si phase content is increased, and precipitation of the brittle Al2Cu phase is restrained; therefore, the aluminum alloy solder has high tensile strength and elongation after fracture under the condition that the melting point is low.

The invention relates to a preparation method of a fuel cell catalyst, and belongs to the technical field of catalysts. According to the invention, the carrier is mixed with the metal salt and then subjected to a hydrogen reduction process to obtain the ternary alloy catalyst which can be used for the fuel cell catalyst, and the catalyst takes platinum as a main component and cobalt and palladium as auxiliary components, so that both the performance and the stability of the catalyst can be ensured; wherein Co can modify the crystal face structure of Pt, the active point location of Pt and the activity of the catalyst are improved, and the catalytic activity is higher. The catalyst can resist chemical corrosion and physical wear in the reaction process by optimizing element composition and a microstructure, long-term catalytic activity is kept, and the reliability and stability of a system are improved. In addition, as Co and Pd are cheaper than Pt, the cost of the catalyst is lower.

To provide a protection element which has a reflow-resistant property, can maintain a low electric resistance as well after a reflow, and has a lead-free fuse element formed of a single alloy.SOLUTION: The fuse element is formed of a single alloy material as an Sn-Ag-Cu three-dimensional alloy. A flux for assisting a welding operation is applied on the fuse element. The silver content is 20-30 mass%, the copper content is 2-10 mass%, and the balance is Sn.SELECTED DRAWING: Figure 1

The invention discloses an environment self-adaptive composite solid lubricant. The environment self-adaptive composite solid lubricant is prepared from the following components in percentage by mass: 80 to 90 percent of Sn-Ag-Cu ternary alloy, 5 to 10 percent of Mo2TiAlC2 and 5 to 10 percent of WS2. On the basis, the invention further provides a vehicle hub bolt fastening sleeve adopting the environment self-adaptive composite solid lubricant, the sleeve comprises a sleeve body and a sleeve inner layer located on the inner wall of the sleeve, the sleeve inner layer is provided with a bionic texture flow channel, and the sleeve inner layer and the bionic texture flow channel of the sleeve inner layer are prepared through the metal 3D printing technology; the bionic texture flow channel of the inner layer of the sleeve is filled with the environment self-adaptive composite solid lubricant, the self-adaptive performance and the mechanical performance of the sleeve can be coordinated and unified, the lubricating effect is effective and reliable, loss of the lubricant in a non-working state is avoided, and the service life of the sleeve is prolonged. The problems that an existing sleeve is high in friction and abrasion and short in service life are solved.

The invention relates to a preparation method of a high-stability PtCoIn ternary alloy fuel cell cathode catalyst, and belongs to the field of new energy nanometer materials and the technical field of catalysis. The invention aims to solve the problems of poor stability and the like caused by easy dissolution of metal elements in a fuel cell working environment of a Pt-based catalyst. According to the main scheme, Co ions coordinated by 1, 10-phenanthroline are adsorbed on a BP2000 (Cabot) carbon carrier by adopting an impregnation method, then high-temperature carbonization is performed to obtain a modified Co-N-C carrier, then the modified Co-N-C carrier is placed in an aqueous solution in which chloroplatinic acid H2PtCl6. 6H2O, cobalt acetate tetrahydrate Co (Ac) 2.4 H2O and indium nitrate hydrate In (NO3) 3. XH2O are dissolved, after impregnation and metal ion adsorption, high-temperature pyrolysis and acid etching are performed, and the Co-N-C carrier is obtained. And removing the unreacted metal precursor and transition metal elements on the surface of the Pt alloy, and finally performing low-temperature carbonization to obtain the small-size, highly-dispersed and highly-stable PtCoIn ternary alloy fuel cell cathode catalyst with a Pt atomic layer structure on the surface.

The invention provides a NiTiCu ternary alloy-based shape memory alloy spring and a preparation method thereof, and relates to the field of shape memory alloys. The method comprises the following steps: (1) a NiTiCu ternary alloy wire is wound into a NiTiCu spring by adopting a hot rolling forming process, and the winding forming temperature is Af + 100 DEG C to Af + 200 DEG C; (2) in a vacuum environment, the NiTiCu spring is subjected to solution treatment, then water quenching is conducted, then aging treatment is conducted, and the heat-treated NiTiCu spring is obtained; and (3) after pre-deformation treatment is conducted on the heat-treated NiTiCu spring, training is conducted in two media of Mf-10-50 DEG C and Af + 10-50 DEG C, circulation is conducted to the target number of times, and the target NiTiCu spring is obtained after training is completed. According to the method, the NiTiCu spring with low lag, fast response and high fatigue resistance is obtained by optimizing the NiTiCu ternary alloy wire component design and cooperating with the spring machining training technology.

The invention provides a hierarchical pore structure self-stabilized silicon-graphite composite negative electrode material and a preparation method thereof, and the preparation method comprises the following specific steps: S1, adding micron-sized AlSi10Mg ternary alloy particles and graphite into a solvent, carrying out ultrasonic dispersion, continuously stirring, and drying to obtain AlSi10Mg / graphite powder; s2, carrying out ball milling on the AlSi10Mg / graphite powder for later use; and S3, adding the ball-milled AlSi10Mg / graphite powder into an oxalic acid solution, and carrying out etching, washing and drying to obtain the target silicon-graphite composite negative electrode material named P-Si / Gr. The preparation process is simple, the synthesis is easy, the production efficiency is high, the preparation cost is low, the safety is high, and the prepared composite negative electrode material has high capacity retention ratio, excellent rate capability and cycling stability and good application prospect when being applied to a lithium battery.

The invention discloses a ternary alloy hydrogen production electrode which is prepared by the following steps: 1) carrying out electrochemical anodic oxidation treatment on a Ni-Cr-Fe ternary alloy foil to obtain an initial state foil; 2) carrying out carbonitriding treatment on the initial-state foil to obtain an intermediate-state foil; and 3) carrying out CV activation treatment on the intermediate-state foil to obtain the ternary alloy hydrogen production electrode. According to the preparation method, after the foil is subjected to carbon-boron co-permeation treatment and CV activation treatment, the obtained alloy foil has excellent performance in the subsequent electrocatalytic water oxidation process, and B atoms can accelerate electrochemical self-optimization to generate more high-activity Ni < 3 + > and Fe < 3 + > catalytic sites; c atoms can stabilize related active sites through metal carbon bonds, efficient and stable water electrolysis oxygen evolution catalytic performance can be achieved through the synergistic effect of the two, and the catalyst is suitable for being used and popularized in the field of catalysis.

The invention provides a preparation method of a two-dimensional anode catalyst for hydrogen production by water electrolysis, which comprises the following steps: firstly, pressing and calcining a precursor at high pressure to form a layered precursor IrxRuyAlzC, then etching an Al atomic layer in the layered IrxRuyAlzC by an etching intercalation solution to form a vacancy, then inserting Li < + > with smaller atomic radius into the interlayer, and further performing ultrasonic stripping and calcining to obtain a two-dimensional IrxRuyO nanosheet. The catalyst disclosed by the invention is a flaky iridium-containing binary or ternary alloy oxide, can be used as an anode catalyst for hydrogen production by electrolysis of water, and has high specific surface area and relatively high OER catalytic activity.

The invention relates to a preparation method of a PtGaGe alloy-loaded oxygen-doped carbon nanotube and application of the PtGaGe alloy-loaded oxygen-doped carbon nanotube in electro-catalytic oxygen reduction.The preparation method comprises the steps that firstly, the oxygen-doped carbon nanotube is prepared through a carboxylation method, and then platinum nitrate tetraammine, gallium nitrate and ammonium hexafluorogermanate are evenly mixed; the preparation method comprises the following steps: adding a PtGaGe alloy into an aqueous solution of an oxygen-doped carbon nanotube while continuously stirring, uniformly stirring at room temperature, freeze-drying, and roasting in a tubular furnace to finally realize successful loading of the PtGaGe alloy, thereby obtaining PtGaGe / OCNTs. As a novel preparation method, the trimetal alloy can be successfully prepared under the low-temperature condition, and the preparation method has the advantages of being simple in preparation process, mild in reaction condition, controllable in alloy variety and content and the like. According to the invention, the unique double p-d orbital hybridization characteristic in the ternary PtGaGe alloy is utilized, the electron structure of platinum is cooperatively regulated and controlled, the atom utilization rate and the catalytic efficiency of the ternary PtGaGe alloy are simultaneously improved, and the tradeoff relationship between activity and selectivity is successfully broken through.

The application discloses a Mo-Ni bimetallic denitration catalyst and a preparation method thereof, and relates to the technical field of denitration agents, and the preparation method comprises the following steps: firstly, a nickel source, a molybdenum source and an aluminum source are smelted and crushed to obtain a Ni-Mo-Al ternary alloy powder; then, the Ni-Mo-Al ternary alloy powder is added into a mixed alkaline leaching solution containing alkali metal hydroxide, a surfactant and hydrophobic conductive micro powder to perform a dealuminization reaction; hydrogen bubbles generated in-situ by the reaction are used as soft templates, and the hydrophobic conductive micro powder is adsorbed on the bubble interface and assembled in the skeleton through Pickering effect; finally, the catalyst is obtained through washing and drying; the catalyst prepared by the application has a large pore structure with conductive micro powder distributed on the inner wall; the unique structure not only reduces the mass transfer resistance, constructs an electron transmission channel, but also promotes the discharge of product nitrogen through a local hydrophobic environment, and significantly improves the catalytic activity and nitrogen selectivity when treating nitrate-containing wastewater.

The present application relates to the technical field of environmental catalytic materials, and particularly relates to a noble metal doped copper-based catalyst and a preparation method thereof.The composition of the catalyst comprises, in percentage by mass, CuO: 11-14%, Pd: 0.3-0.4%, Pt: 0.05-0.1%, MnO2: 11.2-13.2%, Fe2O3: 2-4%, CeO2: 4.7-7%, ZrO2: 3.3-5%, La2O3: 1.5-3%, BaO: 0.8-1.5%, SiO2: 2-4%, and gamma-Al2O3: the balance.The catalyst of the present application successfully constructs high-dispersed Pd-Pt-Cu ternary alloy active centers and super-oleophobic surfaces through precise cooperation of multiple components, and has excellent low-temperature catalytic activity, long-term stability and excellent resistance to oil poisoning, and is particularly suitable for efficient purification of complex oil-containing waste gas such as kitchen fume.

To provide a protector for a direct-current high-voltage current that can be used stably for a long time by immediately attenuating sparks generated between contacts and suppressing ignition and flame propagation even when handling direct-current high voltage of 500 V or higher.SOLUTION: A device includes a fixed contact 11 and a movable contact 21, the movable contact approaching and separating from the fixed contact 11 in accordance with the inversion operation of a bimetal 31 made of a reversing bimetal. A magnet 40 is arranged at side parts of the fixed contact 11 and the movable contact 21. A contact-opening distance between the two contacts is 1.5-2 mm, and the magnet 40 is arranged continuously over the entire vertical range corresponding to the contact-opening distance. The magnet 40 is a ferrite magnet having heat resistance of 300°C or higher, and the structure is configured so that one inversion operation of the reversing bimetal generates the contact-opening distance. At least the surfaces of the fixed contact 11 and the movable contact 21 are formed of a binary alloy or a ternary alloy.SELECTED DRAWING: Figure 1

The invention relates to a method for producing a peelable composite copper foil, comprising:-providing a carrier foil; depositing a release layer comprising a ternary alloy of nickel, molybdenum and tungsten on the carrier foil using an acidic electrolyte comprising nickel, molybdenum and tungsten, said release layer being an amorphous layer; washing the exposed side of the release layer on the carrier foil with a washing solution having a pH of 2.5-4.5; and electroplating an ultra-thin copper foil on the release layer. The present invention also relates to the obtained composite copper foil comprising a carrier foil, a release layer, and an ultrathin copper foil in this order, in which the release layer comprises a ternary alloy of nickel, molybdenum, and tungsten formed as an amorphous layer, and in which the release layer has a peel strength of 30-120 N / m after lamination at 170 DEG C for 1 hour.

The invention discloses a bismuth-antimony-tin alloy negative electrode material of a potassium ion battery and a preparation method of the bismuth-antimony-tin alloy negative electrode material, and belongs to the technical field of new energy. The preparation method comprises the following steps: firstly, obtaining bismuth-antimony-tin alloy precursor powder by adopting an oil bath evaporation drying method, then putting the bismuth-antimony-tin alloy precursor powder into a tubular furnace, carrying out heat treatment under a protective atmosphere, and washing and drying to obtain the bismuth-antimony-tin-carbon composite material. The middle entropy property of the ternary alloy enables the structural stability of the material to be improved, three-dimensional carbon coating can relieve volume expansion of alloy particles in the circulation process, and the circulation stability of the composite material is improved.

The invention discloses a Mo-Ni bimetallic denitration catalyst and a preparation method thereof, and relates to the technical field of denitration agents, the preparation method comprises the following steps: firstly, smelting and crushing a nickel source, a molybdenum source and an aluminum source to obtain Ni-Mo-Al ternary alloy powder; then adding into a mixed alkaline leaching solution containing alkali metal hydroxide, a surfactant and hydrophobic conductive micro powder to carry out dealumination reaction; hydrogen bubbles generated in situ in a reaction are used as a soft template, and hydrophobic conductive micro powder is adsorbed on a bubble interface and assembled in a skeleton through a Pickering effect; and finally washing and drying to obtain the catalyst. The prepared catalyst has a macroporous structure with conductive micro powder distributed on the inner wall, the unique structure not only reduces mass transfer resistance and constructs an electron transport channel, but also promotes discharge of a product nitrogen through a local hydrophobic environment, and the catalytic activity and nitrogen selectivity during treatment of nitrate-containing wastewater are remarkably improved.

The application discloses a shaping die and a preparation method of a shape memory alloy spring. The die is composed of a shaping mandrel, an end anti-rotation clamping assembly and a radial auxiliary locking hoop. When the spring is prepared, the depth of the spiral limiting groove on the shaping mandrel can be customized. The Ti-rich ternary TiNiCu alloy wire is taken as an object, 20%-50% cold deformation is applied to the wire in advance to introduce high-density dislocations and refine grains, the wire is wound on a special constraint aging forming die, constraint aging treatment is carried out at a temperature of 350 DEG C-550 DEG C for 10-60 minutes, and the target spring is obtained after cooling and rotating demolding. By using the die, the shaping is simple, and stable driving characteristics can be obtained without subsequent cycle training, so that the preparation process of the TiNiCu alloy spring is simplified. Through the synergistic effect of component design, controllable cold deformation and constraint aging, the TiNiCu alloy spring prepared by the application has large driving displacement and high cycle stability, and is especially suitable for application scenarios of long service life, high load and precise driving.

The invention discloses a palladium-platinum-copper ternary alloy nano hollow frame, a preparation method thereof and application of the palladium-platinum-copper ternary alloy nano hollow frame in uric acid degradation catalysis. The preparation method comprises the following steps: synthesizing palladium nano solid cubic particles; depositing platinum atoms on the surface of the palladium-platinum nano cubic particle to form a palladium-platinum nano cubic particle with a core-shell structure; selectively etching a palladium core through an aqueous solution system of ferric chloride, potassium bromide and hydrochloric acid to obtain a palladium-platinum nano hollow frame; the palladium-platinum-copper ternary alloy nano hollow frame is obtained through co-deposition of platinum atoms and copper atoms in different proportions on the palladium-platinum nano hollow frame. The palladium-platinum-copper ternary alloy nano hollow frame material with different element proportions and a complex fine structure is prepared through adjustable and controllable simple preparation steps, and the palladium-platinum-copper ternary alloy nano hollow frame material has an appropriate size and high uric acid degradation catalysis activity and becomes a nano functional mimic enzyme material capable of being applied to biological uric acid degradation.

The invention relates to a carbon-loaded platinum-based ternary alloy catalyst and preparation and application thereof, the preparation method of the catalyst comprises the following steps: S1, dispersing a carbon carrier, a platinum-containing compound solution and a soluble metal salt solution of cobalt and nickel into ethylene glycol to obtain a ternary precursor suspension; and S2, adding a precipitator into the ternary precursor suspension, stirring, reacting in a microwave reactor, separating a product, washing and drying to obtain the carbon-loaded platinum-based ternary alloy catalyst. The preparation method has the characteristics of rapidness, simplicity and convenience, and is convenient for batch production; meanwhile, under the microwave reaction condition, Ni is used for promoting the activity of the Pt catalyst, Co and Ni are used for cooperatively regulating and controlling the particle size and dispersity of the catalyst, and the efficient synergistic effect of ternary metal under the microwave effect is achieved. The prepared PtCoNi ternary alloy catalyst is lower in noble metal content, moderate in particle size, uniform in dispersion, high in catalytic activity, good in stability and suitable for oxygen reduction reaction of fuel cells.

The invention relates to a biodegradable Zn alloy and a preparation method thereof. The preparation method comprises the following steps that (1) a Zn-Cu-Sr ternary alloy melt is prepared, the mass ratio of Cu ranges from 0.5 wt% to 2.5 wt%, and the mass ratio of Sr is smaller than or equal to 0.5 wt%; and 2) pouring the ternary alloy melt at the set temperature in the step 1) onto a base plate, and feeding the base plate into a casting and rolling machine for casting and rolling to obtain the target biodegradable Zn alloy. The biomedical degradable Zn-Cu-Sr ternary alloy is prepared by adopting a liquid casting and rolling technology, alpha-Zn and a second phase CuZn4 and SrZn13 can be remarkably refined by adopting the liquid casting and rolling technology, meanwhile, the mechanical property is remarkably improved, and the mechanical property requirement of a degradable implant can be met through one-time forming. Compared with a traditional method that rolling or extruding is conducted after casting, the technology is simple, the advantages of the casting technology and the rolling technology are integrated, the beneficial effects of being comprehensive, efficient, energy-saving, short in process, low in production cost and capable of achieving near-net-shape forming are achieved, and later-period tedious technologies are reduced.

Freestanding, composite anodes include biphasic Li-Mg-X ternary alloys. The composite anodes feature improved Li-ion transport and reduced dendrite formation. Biphasic Li-Mg-X ternary alloyed anodes may be paired with iron phosphate-containing cathodes. The Li may be present in an amount from about 10 wt% to about 90 wt%. The Mg may be present in an amount from about 5 wt% to about 50 wt%. Ternary alloy component(s) may include calcium (Ca), gallium (Ga), boron (B), tin (Sn), aluminum (Al), indium (In), bismuth (Bi), antimony (Sb), tellurium (Te), carbon (C), silicon (Si), bismuth telluride (BiTe), antimony telluride (SbTe), zinc (Zn), etc., in amounts from about 1 wt% to about 90 wt%. The anodes may include lithium-ion conducting material(s): bismuth telluride (BiTe), antimony telluride (SbTe), lithium-doped tritelluride (LiTe3), lithium titanate (Li4Ti5O12, "LTO"), lithium lanthanum zirconium oxide (Li7La3Zr2O12, "LLZO"), lithium phosphide (Li3P), molybdenum oxide (MoO), molybdenum disulfide (MoS2).

The invention relates to the technical field of material surface treatment, and discloses a metal surface composite coating process and a metal surface composite coating part. According to the metal surface composite coating process, the metal surface is subjected to the steps of pretreatment, nickel pre-plating, copper plating, ternary alloy plating, silver pre-plating, silver plating, nickel plating, nickel plating again, mask positioning, pretreatment again, local gold plating, post-treatment and the like, the appearance of a prepared metal surface composite coating part is qualified, the total coating thickness is 9.3-12 m, and the thickness of the metal surface composite coating is 0.5-1.5 mm. And the thickness of the eighth gold plating layer is 0.76-1.1 m, the binding force of the metal surface composite coating component reaches the 0-level or 1-level level, and after a corrosion resistance test, the surface is not corroded, so that the requirements of good binding force on the metal surface composite coating component, relatively high corrosion resistance in an extreme environment and the like in the application fields of electronics, aerospace and the like are met.

The application relates to the technical field of heat exchange equipment, in particular to a memory alloy frost suppression piece, a preparation method thereof and a finned tube heat exchanger applying the same. The memory alloy frost suppression piece adopts a Ti-Ni-Sn ternary alloy material, and the atomic percentage components are as follows: Ti is 51at.%-53at.%, Ni is 42at.%-46at.% and Sn is 3at.%-5at.%. The finned tube heat exchanger comprises a heat exchange tube group and a frost suppression assembly comprising the memory alloy frost suppression piece; a plurality of heat exchange fins of the heat exchange tube group are sleeved on the outer periphery of a heat exchange coil in the axial direction of the heat exchange coil, and heat exchange gaps are formed between adjacent heat exchange fins; the memory alloy frost suppression piece is spirally wound around the finned tube heat exchanger in the axial direction of the heat exchange coil, the memory alloy frost suppression piece is arranged in the heat exchange gap of the heat exchange coil and has a ventilation gap between adjacent heat exchange fins. The memory alloy frost suppression piece can cover the heat exchange area through phase change deformation and vibration, thereby realizing frost suppression. Through the application of the memory alloy frost suppression piece, the finned tube heat exchanger has an energy-saving effect.

The application relates to a preparation method of a ternary alloy nanoflower and an organic hybrid composite film thereof, and belongs to the technical field of nanometer materials and functional films. BiCl3, SbCl3 and TeO2 are dissolved in ethylene glycol, NaOH and PVP K30 are added, stirring is carried out at room temperature until a clear solution is obtained, the solution is transferred to a reaction kettle, and reaction is carried out in a blast drying oven; after cooling, centrifugal washing is carried out; after drying, a Bi-Sb-Te alloy nanoflower is obtained; the Bi-Sb-Te alloy nanoflower is mixed with a PEDOT:PSS aqueous solution; a conductive enhancer is added, ultrasonic dispersion is carried out to form a uniform slurry; the slurry is deposited on the surface of a glass substrate by using a drying machine through a flow casting method; after annealing, the film is peeled off, vacuum drying is carried out, and a flexible thermoelectric composite film is formed. Through the establishment of a trinity technology of "nanoflower morphology design-in-situ interface optimization-low temperature solution process", the problems of poor flexibility of traditional thermoelectric materials, nanocomposite interface failure and unsustainable high-temperature process are solved.

The application discloses a preparation process of a high-performance Cu-Ni-Fe alloy based on first-principle calculation design, and relates to the technical field of alloy material preparation. The process constructs a precise Cu-Ni-Fe ternary alloy thermodynamic database by combining a first principle with a CALPHAD method, determines a composition range based on database calculation of a multivariate phase diagram, optimizes the composition by calculating a work function, an elastic constant and a thermal expansion coefficient through a first principle, and obtains a finished product through smelting, heat treatment and forming processing. The final alloy has an atomic percentage composition of Cu 30%-75%, Ni 10%-30% and Fe 10%-30%, a tensile strength of greater than or equal to 816.4 MPa, a total elongation at break of greater than or equal to 34.27%, and a thermal expansion coefficient of less than 20*10 ‑6 / K, and has excellent mechanical properties and thermal stability, thereby solving the problems of blind composition design and large performance fluctuation of a traditional process and being suitable for multiple fields such as ocean engineering and electronic packaging.