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Physical and mechanical properties of injection molded co-cr-mo alloy powder for orthopedic applications

Johari, Nurhaslina and Sauti, Rosliza and Abdullah, Noorsyakirah and Mohd Zainon, Nurazilah and Meh, Bakar and Abd Jalil, Mohd Nizam and Mohd Hijazi, Mohd Bakri and Omar, Ahmad Zahid and Omar, Mohd Afian and Baharuddin, Mohd Yusof and Zulkifly, Ahmad Hafiz (2016) Physical and mechanical properties of injection molded co-cr-mo alloy powder for orthopedic applications. Advanced Materials Research, 1133. pp. 80-84. ISSN 1662-8985

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Cobalt-chromium alloys are commonly used for surgical implants because of their high strength, superior corrosion resistance, non-magnetic behavior, and biocompatibility. Cobalt- Chromium-Molybdenum (Co-Cr-Mo) applications include prosthetic replacements of hips. This paper presents the attempt to produce metallic implant using Co-Cr-Mo powder by MIM process, focusing on the effects of different heating rate during sintering process at 1380 oC. Co-Cr-Mo powder was mixed homogeneously with palm oil based binder with powder loading of 65 vol% and was injection molded using vertical injection molding machine with the nozzle temperature of 160 °C to produce green compacts. The binders were then removed by solvent extraction process and sintered in vacuum condition at 10-5 mbar at 1380 °C. Results indicated that sintered density and tensile strength varies from 8.1 g/cm3 to 8.2 g/cm3 and 546 MPa to 797 MPa respectively. The mechanical properties comply with the international standard (ASTM F75).

Item Type: Article (Journal)
Additional Information: 2397/49243
Uncontrolled Keywords: MIM, Co-Cr-Mo, feedstock, sintering, physical and mechanical properties
Subjects: R Medicine > RD Surgery > RD701 Orthopedics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Medicine > Department of Department of Orthopaedics, Traumatology & Rehabilitation
Depositing User: Sr. Syazwani Othaman
Date Deposited: 29 Mar 2016 17:03
Last Modified: 22 Jul 2016 15:49
URI: http://irep.iium.edu.my/id/eprint/49243

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