368 results about "Titanium surface" patented technology

The invention discloses a construction method of titanium surface micron-size picture based on super hydrophilic/super hydrophobic peculiarity, which comprises the following steps: pre-processing the surface of base material; allocating electrolytic solution; controlling voltage and temperature; proceeding electro chemical anodic oxidation; getting titanium oxide nanometer structure array film layer; proceeding heat treatment; getting example; soaking in fluorine silicane methanol solution at 10-240 min; getting out; drying at 120-160 deg.c; getting super hydrophobic TiO2 nanometer structure array film layer; covering photomask; irradiating with ultraviolet light; getting the final picture.

A titanium-aluminide turbine wheel (120, 220, 320, 420) is joined to the end of a shaft (110, 210, 310, 410) by utilizing a titanium surface on the end of the shaft to be joined to the wheel, and electron-beam welding the wheel onto the titanium surface on the shaft. A steel shaft (110, 310, 410) can have a titanium-containing end piece (130, 330, 430) mechanically joined (by brazing, bonding, or welding) to the end of the shaft, and the end piece can be directly electron-beam welded to the wheel. Alternatively, the shaft (210) can be formed as a titanium member and the end (212) of the shaft can be directly electron-beam welded to the wheel (220). In another embodiment, a ferrous end piece (330) is mechanically joined to the titanium-aluminide turbine wheel (320) and then the end piece is directly electron-beam welded to the end of a steel shaft (310). Alternatively, a silver-titanium alloy member (430) is sandwiched between the wheel (420) and a steel shaft (410) and is melted to join the parts together.

A catheter for human or animal vascular engagement is provided. The catheter has at least one interior lumen defined by a sidewall having an exterior circumferential. A titanium surface area is positioned along the circumferential surface entirely or at one or both ends to enhance lubricity. Additionally included may be an anti pathogenic and/or anti microbial surface area positioned adjacent to the titanium surface area of the circumferential surface.

The present invention relates to an epoxidation catalyst preparation method and a prepared epoxidation catalyst thereof, and applications of the epoxidation catalyst. According to the present invention, titanium is loaded onto a silica gel by using a chemical vapor deposition method, silanization treatment and hydrolysis are performed, and molybdenum is loaded onto the titanium surface by using a liquid phase ion exchange compounding method so as to achieve the directional loading of molybdenum; the epoxidation catalyst has excellent molybdenum stability; and with the application of the epoxidation catalyst in oxidation of olefins to produce the corresponding epoxy compound, the catalytic activity and the selectivity are high.

The invention discloses the preparation method of black titanium oxide film at titanium surface. The preparation process is: after atmospheric oxidation, anodized or micro-arc oxidation, a titanium oxide film with more than 0.01Mum thickness is generated at the surface of a clean titanium or titanium alloy specimen. After washing and drying, the specimen which generates the titanium oxide film at surface is arranged in vacuum or non-oxidizing atmosphere for heat treatment, and then a black titanium oxide film is formed at the surface of the titanium. The invention is characterized by simple preparation method of generating black titanium oxide film at titanium surface, low cost and no pollution.

Disclosed is micro-arc oxidation process to reduce the friction coefficient of titanium alloy surface, which has the process steps of (1) the chemical degreasing, (2) the micro-arc oxidation that the basic parameters are trisodium phosphate of 1-30g / L, tungsten sodium of 0-10g / L, sodium silicate of 0-50g / L, tartaric acid of 0-20g / L, glycerol of 0-10g / L and sodium hydroxide of 5-10g / L, (3) the post-processing that the hot oil immersion treatment is proceeded for the film after the oxidation. Through the invention, the high-performance ceramic membrane with strong cementing property, high hardness and low coefficient friction can be obtained on the titanium surface. Through the testing of a high-temperature friction and wear testing machine of MM-U5G screen material end surface, the friction coefficient of the titanium micro-arc oxidation film is 0.1 to 0.5. During the observation of the oxidation film after the experiment, the shedding and wear phenomenon is not found.

The invention discloses a method for forming a graded multi-hole shape on the titanium surface, which is used for surface treatment of a pure titanium biological material and comprises the steps of titanium sample polishing and cleaning, shot blasting treatment, acid etching, anodic oxidation and ultrasonic cleaning. The graded multi-hole shape with biological activity and a thick ionic compound TiO2 layer formed by combining ionic bonds and with high biological chemical stability are formed on the pure titanium surface. The method combines the acid etching and anodic oxidation, wherein micron-sized holes and sporadic micron-sized holes are formed through shot blasting treatment, many evenly-distributed micron-sized holes are produced through anodic oxidation reaction, and the thick ionic compound TiO2 layer is formed. The method for forming the graded multi-hole shape on the titanium surface greatly improves the biological activity of the pure titanium surface and the stability of pure titanium.

The invention relates to a modification method for a titanium surface with osteogenic performance and antibacterial performance. The modification method adopts a plasma-immersion ion implantation treatment process to co-implant silver ion and calcium ion to the surface of a titanium base material, wherein the co-implantation simultaneously arouse two cathode impulse arc sources, which respectively adopt pure silver and pure calcium as a cathode, to carry out plasma-immersion ion implantation treatment process. The silver-calcium co-implantation method provided by the invention can be used for improving the osteogenic performance and antibacterial performance of the surface (for example an artificial bone, an artificial joint and a dental implant) which can be implanted to medical equipment. The prepared modified material has a remarkable inhibitory effect to the escherichia coli and staphylococcus aureus, and a remarkable promotion to adhesion and proliferation of relevant osteoblast (BMSCs, MG63 cells).

The invention relates to a method for making a TiO2 nano hole array material and an application thereof. Firstly, a titanium plate undergoes surface treatment and is used as an anode, and in the organic electrolyte solution of hydrofluoric acid or fluoride with the fluorine content of between 0.1 and 10wt%, the titanium plate undergoes the anode oxidation under the voltage of between 10 and 80V for 20 to 100h; after a loose film layer on surface of titanium metals is removed, the titanium based titanium oxide nano hole array materials formed by titanium metals and titanium oxides on titanium surface are obtained with the pore diameter of the materials is between 60 and 400, and the pore depth is between 10 to 250nm; the materials are sintered at the temperature of between 300 and 700DEG C for 0.5 to 1.5h, and the TiO2 nano hole array materials with a certain crystalline phase composition are obtained. The TiO2 nano hole array material of the invention has the advantages that the TiO2 is firmly connected with a matrix, so that the material is strong in withstanding external mechanical acting forces and resisting the stress deformation and cracking caused by the change of ambient temperature; moreover, the material is high in stability, therefore the material is widely applied to such fields as chemical oxygen demand sensors used in photoelectrocatalysis and water pollution monitoring.

The invention relates to an application of femto-second laser in the surface treatment of the pure titanium implanting material, belonging to the technical field of application of laser in the material surface treatment. The application method comprises the following steps: in the air, the femto-laser impulse is in normal incidence and focused right on the top of the lump pure titanium implanting material which is ground and dried, a light spot with a radius of 5um is formed at the surface of the pure titanium implanting material, the femto-laser processing parameters are defined as follows: the impulse repeat frequency is 1 kHz, the single impulse power is from 5 to 200 micro joule, the impulse width is 50 femtosecond, the impulse center wavelength is 800 nanometer, the line interval of the laser processing is between 10 to 100 micron, the laser scanning speed is between 0.5 to 1.2 mm/sec, the laser polarization direction is regulated to be parallel to the laser scanning direction, the femto-laser scans the whole surface of the pure titanium implanting material, a titanium based biomedical material with an oxide layer generated on the titanium surface, even roughness, and a pattern of strips, holes, grooves or the combined pattern thereof formed on the pure titanium implanting material is made.

The invention discloses a method for coating the surface of titanium materials, which comprises the following steps: cooling an alkali heat treated titanium disc, putting the titanium disc in a 12-hole plate, respectively adding 5ml of 1.5 times of bionic liquid to each hole, standing the bionic liquid for 2 to 14 days at a temperature of 37 DEG C, and changing 1.5*CSBF liquid every 12h; taking out the titanium disc for washing with deionized water, and naturally drying the titanium disc to acquire a bioactive coating on the titanium surface. The coating is a composite coating of recombined collagen and hydroxyapatite. The coating formed by the method is a composite of nano-hydroxyapatite crystals and the recombined collagen, has two key components of a natural bone, and has the function of promoting cell adhesion, proliferation and differentiation. The prepared titanium composite materials can be applied in bone tissue engineering as bone repair or substitute materials.

The invention relates to application of pure titanium and titanium alloy (hereinafter called titanium) surface-etched TiO2 nano-porous array appearance in preparing human metal implant which can be a dental implant, a bone implant, a fixing plate and a fixing nail, wherein the appearance is to prepare a TiO2 nano-porous array structure on the titanium surface. The invention also provides an optimal preparation method of the appearance. The preparation method has the advantages that: the preparation can be performed at normal temperature and normal pressure; the prepared TiO2 nano-porous array is regular; and the method is relatively simple in process, convenient for operation, low in cost and short in process flow. The prepared titanium surface nano-porous array structure has selective effect to different types of cells, so that the success rate of implant can be greatly increased; the nano-porous array structure can inhibit fibroblast from adhering or multiplying on the surface of the structure, so that the success rate of bone and dental implant operation and bone internal fixation can be greatly improved; and therefore, the preparation method is a bone implant material and bone fixation material surface appearance modification method with clinical application prospect.

A process for preparing a composite coating of hydroxyapatite and porous titanium dioxide on the biomedical titanium metal surface belongs to the technical field of metal surface modification. Compared with other technologies of coating titanium surface bioactive coating, the process prepares the a composite coating of hydroxyapatite and porous titanium dioxide on the biomedical titanium matrix surface in situ, thereby the adhesion of titanium matrix substitutes implanted into the body and bone tissues is remarkably improved. The process includes the following steps of, firstly, placing titanium or titanium alloy into a stainless steel groove containing an alkaline electrolyte, using a bipolar impulsing power source, controlling micro-arc oxidation electrical parameters and micro-arc oxidation time, enabling the titanium surface to form a porous titanium dioxide coating by a disruptive discharge of the titanium surface; secondly, putting the coating into a reactor containing liquid through a hydro-thermal method, thereby the hydroxyapatite can grow in situ of the biomedical titanium matrix surface in situ. The process for preparing a composite coating of hydroxyapatite and porous titanium dioxide on the biomedical titanium metal surface is simple in operation, high in controllability and low in manufacturing cost, and can introduce non-toxic substances into the coating.

The present invention provides technology for rare metal plating of titanium surfaces. A process such as the following would be carried out when manufacturing a partially gold-plated separator for a fuel cell, for example. First, a titanium component made of titanium or titanium alloy is prepared for use as the fuel cell separator (S10). This titanium component is a titanium component whose surfaces are coated with carbon-containing substance. This titanium component is then subjected to a first heat treatment at a prescribed first temperature of between 300 and 700 degrees Celsius (S20). Gold plating of the surfaces of the heat-treated titanium component is then carried out (S80). In this way it is possible to more easily carry out gold electrolytic plating of titanium surfaces.

The invention discloses titanium or a titanium alloy having a TiO2-HA surface coating and a preparation method thereof. The titanium or the titanium alloy having the TiO2-HA surface coating comprises a TiO2-HA gradient coating and a titanium substrate or a titanium alloy substrate, wherein the TiO2-HA gradient coating is coated on the titanium alloy substrate or the titanium alloy substrate and comprises an HA layer, a TiO2-HA layer and a TiO2 layer sequentially from outside to inside. The preparation method comprises the following steps of: firstly, performing alkali thermal treatment on a titanium surface or a titanium alloy surface subjected to surface pretreatment, and secondly, coating sol of titanium dioxide, compound sol of titanium dioxide and hydroxyapatite, and sol of hydroxyapatite on the titanium surface or the titanium alloy surface. Residual stress caused by the thermal mismatching between the substrate and the coating can be reduced by using the gradient coating, so that the substrate and the coating have high bonding strength; and the preparation method provided by the invention has the advantages of simple operation, easy implementation, low treatment temperature, no damage to the mechanical properties of the titanium or the titanium alloy, and low cost.

The invention discloses a method for preparing a black titanium oxide coating on a titanium surface, which relates to a method for preparing a micro-arc oxidation coating on a titanium surface. The invention solves the problems of complexity, high energy consumption and high cost of the traditional preparation process of forming a black titanium oxide film on the titanium surface. The method is characterized in that a titanium part is taken as the anode after being degreased, stainless steel is taken as the cathode, the anode and the cathode are soaked in an electrolyte, and micro-arc oxidation is carried out after electrical parameters are regulated, thereby the black titanium oxide coating on the titanium surface is obtained. The invention simplifies the process and has simple operation, energy and time saving and low cost by adopting a single-step micro-arc oxidation process; the obtained black titanium oxide coating is even and has high blackness, and the emission coefficient is 0.85 to 1.0 within the infrared wavelength range of 8 to 14mum; and the reflection coefficient of the wavelength of the black titanium oxide coating is 0.02 to 0.15, and thereby, the black titanium oxide coating is used for the field of military thermal control and civil decorative coatings. The invention is not limited by the shape and the dimension of the part, thereby being suitable for industrial mass production.

The invention provides a method for solidly supporting molybdenum disulfide through a porous titanium oxide film, and belongs to the technical field of surface modification of metal materials. The method comprises the following steps: performing in-situ assembling on a porous titanium dioxide film on the metal surface of metallic titanium by an anodizing method; and then introducing a solid lubricant into the porous titanium dioxide film by a magnetron sputtering technology, wherein the minimum frictional coefficient of the titanium surface can reach 0.20 and is far less than the frictional coefficient of 0.46 of pure titanium; the solid lubricant can deposit on the surface of the porous titanium dioxide film and can be recycled in 4305 times; if the porous titanium dioxide film is not used, the lubricant falls off after being recycled in 15 times. According to the method, the technology of solidly supporting a solid lubricant in the porous titanium dioxide film is provided and can greatly decrease the frictional coefficients of the metallic titanium surface, and a novel effective measure is provided to solve the problem of meshing, caused by adhering, of a titanium alloy fastener.

The invention relates to a method for preparing a calcium hydrophosphate micro-nanofiber conversion coating on a pure-titanium surface. A method that under the proper pH-value condition, a chemical conversion solution carries out chemical conversion treatment on the pure-titanium surface is adopted, and a chemical conversion solution is a solution composed of the proper amount of phosphoric acid, compounds containing calcium ions, zinc ions and dihydrogen phosphates, and an accelerant; and according to chemical conversion treatment, a pure-titanium sample obtained after proper activation treatment and surface adjustment is coupled with pure iron, then, ultrasonic field manufacturing and water bath heating are carried out, and the calcium hydrophosphate micro-nanofiber conversion coating on the pure-titanium surface is obtained. A phase of the conversion coating prepared on the pure-titanium surface through the method is a CaHPO4 2H2O crystal, and a crystal aggregate can induce and promote formation of hydroxyapatite (HA) in simulated body fluid; and the formed conversion coating is of a micro-nano fiber-shaped structure close to a human body multi-level micro-nano structure, and the method has the important significance in regulating and controlling cells, the tissue reaction and the like.

The invention relates to a method for improving biological activity of a pure titanium surface by using dopamine to be bonded with graphene oxide. The method comprises the following steps: successively carrying out ultrasonic cleaning on a pure titanium sheet of which the surface roughness Ra is not greater than 1micron by adopting acetone and deionized water; carrying out acid treatment by using a nitric acid, cleaning the pure titanium sheet by the deionized water, and then carrying out alkali treatment on a sample by using sodium hydroxide at 40-80 DEG C; preparing a dopamine-trihydroxymethyl aminomethane solution of which the pH is 8.5; soaking the processed pure titanium sample into the prepared dopamine solution, and standing the sample at room temperature for 12-24 hours; taking out the sample, cleaning the sample by using the deionized water, and drying the sample at room temperature, so as to prepare a titanium/dopamine sample; soaking the titanium/dopamine sample into a graphene oxide water solution and standing the sample at room temperature for 12-24 hours; and cleaning the sample by using the deionized water after taking out the sample, drying the sample at room temperature, so as to prepare a titanium/dopamine/graphene oxide sample. The method is simple to operate, green and pollution-free, mass production can be achieved, and a channel is expanded for surface modification of the titanium material.

The invention discloses a preparation method of a titanium surface porous structure layer bioactive ceramic membrane with low elasticity modulus, and relates to the field of biomedical implant, especially the preparation technology of a biomedical implant made of a titanium or titanium alloy material. The method comprises steps of: first preparing a porous structure layer on a matrix structure of a pure titanium or titanium alloy implant with a solid structure by using a powder metallurgy method; then forming a titanium dioxide membrane containing calcium and phosphorus on a hole surface of the porous structure layer by a micro-arc oxidation method; and finally, preparing a hydroxyl apatite layer on a hole external surface of the porous structure layer by an electrodeposition method. The invention can realize formation of porous structure layer on the surface of the pure titanium or titanium alloy implant with solid structure, and reduce elastic modulus on the implant surface; meanwhile, the implant is endowed with high biological activity through implantation of a hydroxyapatite layer, and can be used in the field of biological medicine.

The invention discloses a titanium and titanium alloy surface carbonitriding device and a method thereof. In a vacuum state, the temperature of titanium and titanium alloy reaches to 700 DEG C to 1100 DEG C, a high purity CO 2 gas with 0.1 Pa to 1000 Pa of pressure is inlet, and after 0.5 hour to 200 hours of processing, a 30Mum to 1000Mum thick of hard coat is formed at the surface of the titanium alloy; the compositions of the hard coat are the oxide and carbide of titanium, with a hardness reaching to 700 to HV 1100. The inexistence of H element which results in the hydrogen embrittlement of titanium in preparation process realizes the non-hydrogen hardening of the titanium surface.