Chromium Cobalt Alloy Powder
Cobalt-chrome or cobalt-chromium (CoCr) is a metal alloy of cobalt and chromium. Scientist have noticed that cobalt-chromium powders are capable of resisting oxidation and corrosive fumes and exhibited no visible sign of tarnish even when subjecting the alloy to boiling nitric acid. The hardness of Co-Cr alloys varies ranging 550-800 MPa, and tensile strength varies ranging 145-270 MPa. Recently, due to excellent resistant properties, biocompatibility, high melting points, and incredible strength at high temperatures, Co-Cr alloy powder is used for the manufacture of many artificial joints including hips and knees, dental partial bridge work, gas turbines, and many others. Co-Cr alloy powders show high resistance to corrosion due to the spontaneous formation of a protective passive film composed of mostly Cr2O3, and minor amounts of cobalt and other metal oxides on the surface. As its wide application in biomedical industry indicates, Co-Cr alloys are well known for their biocompatibility.