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http://dx.doi.org/10.14347/kadt.2015.37.4.235

Microstructure and Mechanical Properties of Co-Cr-Mo alloy for CAD/CAM Applications fabricated by Powder Metallurgy Process  

Cha, Sung-Soo (Dept. of Dental Lab Technology, Jinju Health College)
Publication Information
Journal of Technologic Dentistry / v.37, no.4, 2015 , pp. 235-242 More about this Journal
Abstract
Purpose: The aims of this study are compare with microstructure and mechanical properties of Co-Cr-Mo alloys fabricated by powder metallurgy(P/M) process and casting process respectively. Methods: Microstructure and micro-hardness were tested by SEM and Vickers Hardness Tester. The sintered specimen was produced by furnace-coolling after sintering, however the casting specimen were produced thru air-cooling and water-cooling after the casting. For observation of phase transformation during sintering, DSC analyzing was carried out. Results: Mean pore size of sintered Co-Cr-Mo alloy was $4.32{\mu}m$ and that of casting alloy was $1.63{\mu}m$. Hardness of sintered alloy was lower than water-quenched casting alloy. Conclusion: Proper sintering temperature of Co-Cr-Mo alloy was above $1,200^{\circ}C$ and pore size of casting specimen were finer than sintered specimen, but hardness were similar.
Keywords
Co-Cr-Mo alloy; Powder metallurgy; CAD/CAM; Sintering Microstructure; Mechanical Property;
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