What is Nitinol? Pre-alloyed Nitinol powders can be fabricated by inert gas atomization, hydriding, pulverization, or mechanical alloying. The powders are then blended, compacted, and sintered. Reported compaction processes include hot and cold isostatic pressing, hot and cold uniaxial die compaction, direct powder rolling, and consolidation by atmospheric pressure (CAP). The resulting density varies from process to process. While 68% was reported for CAP, 95% density can be achieved by hot isostatic pressing (HIP). Using a PM process, a proper ratio of two Nitinol powders with different transformation temperatures are blended, hot isostatically pressed, and sintered. A desired intermediate transformation temperature of sintered part can be obtained through this approach with good precision.
Finishing of Nitinol Heat-treated Nitinol has a typical oxide finish ranging from straw color to blue color. The black color oxide may appear if the processing oxide was not removed during fabrication. These oxide layers, such as grit blasting and polishing, can be removed mechanically. By proper selection of polishing media, a mirror-like finish can be achieved by mechanical polishing. Chemically etching, also effective in removing surface oxide, produces a silver-looking surface. Electro-polishing of Nitinol has also been demonstrated to produce a highly smooth finish. The corrosion resistance of Nitinol is significantly affected by methods of surface preparation. It is a general belief that the preferential formation of titanium oxide on the surface enhances passivity and corrosion resistance. Mechanically polished surfaces, although they can be highly smooth, appear to be most susceptible to corrosion attack, while chemically etched surfaces appear to be the most passive. Electro-polishing alone does not sufficiently enhance the corrosion resistance of Nitinol. Passivation following the ASTM F86 procedure results in much-improved erosion resistance and biocompatibility.
Coating of Nitinol Ni coating can be deposited onto Nitinol by electrolytic or electroless processes. Other metals,h as Au, can also be applied electrolytically. There are risks associated with the electroplating process that requires careful contcontrolod adhesion and duct flexibility coating to prevent flaking when deformed to large strains. Damages of coating by either flaking or scratching five massive lead to galvanic corrosion. Hydrogen charged into the alloy during plating also must manage to prevent hydrogen embrittlement. Polymeric coatings are applied by co-extrusion, spray coating, or other surface deposition techniques. PTFE is spray-coated and cured at high temperatures greater than 300°C, which can affect the thermomechanical properties of Nitinol. PTFE films can also be applied by plasma polymerization. Other polymers, such as polyurethane and propylene, have been applied with good results.
Price of Nitinol Nitinol particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Nitinol. A large amount of large amount will be lower. The Price of Nitinol is on our company's official website.
Nitinol supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Nitinol, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Nitinol, you are welcome to contact us or inquire at any time.
