Microstructure and Mechanical Properties Study of CoCrMo Parts Sintered under Control Atmosphere

Mohamad Azmirruddin Ahmad; Fazira Suriani Mohamed Fadzil; Mazlan Mohamad; Mohamad Hasnan Abdul Hamid; Mohd Asri Selamat

doi:10.4028/www.scientific.net/AMR.1133.85

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1133Microstructure and Mechanical Properties Study of...

Microstructure and Mechanical Properties Study of CoCrMo Parts Sintered under Control Atmosphere

Abstract:

Their excellent properties, such as corrosion resistance, fatigue strength and bio-compatibility, made Cobalt-chromium-molybdenum (CoCrMo) were used in total hip and knee replacements and dental devices. The green CoCrMo compacts specimens in rectangle shape were fabricated by powder pressing technique. The effects of sintering temperature and atmosphere on the mechanical properties and microstructure of the CoCrMo compacts which is sintered at 1300°C-1400°C under two different inert gases sintering atmosphere (Ar₂/N₂H₂) were investigated. The experimental results show that the grain boundaries sizes of CoCrMo compact sintered specimen were increased with increasing sintering temperature. The CoCrMo compacts specimens sintered at 1350°C under inert gases N₂H₂ atmosphere possess highest density (8.096 g/cm³) and hardness (327.1Hv). However, when the compacts specimens are sintered at 1400°C, the density (7.596 g/cm³) and hardness (320 Hv) properties of sintered compact were decreased.

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Periodical:

Advanced Materials Research (Volume 1133)

Pages:

85-89

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1133.85

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Online since:

January 2016

Authors:

Mohamad Azmirruddin Ahmad, Fazira Suriani Mohamed Fadzil, Mazlan Mohamad, Mohamad Hasnan Abdul Hamid, Mohd Asri Selamat

Keywords:

CoCrMo Sintered Part, Mechanical Properties, Microstructure, Sintering Atmosphere

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