Naslov
Effects of Ni and Mo on the microstructure and some other properties of Co-Cr dental alloys

Autori
Matković, Tanja ; Matković, Prosper ; Malina, Jadranka

Izvornik
Journal of Alloys and Compounds (0925-8388) 366 (2004), 1-2; 293-297

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Co-Cr alloys; implant alloys; mechanical properties; corrosion resistance

Sažetak
Influences of adding Ni and Mo on the microstructure of as-cast Co-Cr base alloys have been investigated in order to determine the region of their optimal characteristics for biomedical application. The alloys were produced by arc-melting technique under argon atmosphere. Using optical metalography and scanning electron micro analyser has been established that among then samples of Co-Cr-Ni alloys only samples 5 and 9 with the composition Co55Cr40Ni5 and Co60Cr30Ni10 have appropriate dendritic solidification microstructure. This microstructure, typical for commercial dental alloys, appers and beside greater number of as-cast Co-Cr-Mo alloys.The results of hardness and corrosion resistance measurements revealed the stron influence of different alloy chemistry and of as-cast microstructure. Hardness of alloys decreases with nickel content, but increases with chromium content. Therefore all Co-Cr-Ni alloys have significantly lower hardness than Co-Cr-Mo alloys. Superior corrosion characteristics have the samples with typical dendritic microstructure and higher chromium content, until nickel content have not significant effect.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija

POVEZANOST RADA