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Metal injection moulding of hip stem CoCrMo alloy powder using palm stearin binder system

Omar, Mohd Afian and Abdullah, Noorsyakirah and Sauti, Rosliza and Mohd Zainon, Nurazilah and Johari, Nurhaslina and Zulkifly, Ahmad Hafiz and Baharuddin, Mohd Yusof (2016) Metal injection moulding of hip stem CoCrMo alloy powder using palm stearin binder system. Advanced Materials Research, 1133. pp. 334-338. ISSN 1662-8985

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Metal Injection Moulding (MIM) has undergone development of various binder systems with the aims of shortening the overall debinding time duration. In the present work, binder system based on biopolymer has been utilised in injection moulding of hip stem CoCrMo alloy powder. The feedstock consisted of CoCrMo powder with mean diameter particle size of 16 μm and binder which comprised of major fraction of wax and minor fraction of polyethylene. The moulded part was immersed into n-heptane at 60 °C in order to remove the palm stearin, followed by sintering in a controlled vacuum atmosphere. Results showed that solvent extraction debinding technique allowed complete removal of palm stearin from the injection moulded part within 5 hours without swelling or distortion of the debound part. Lower heating rate is needed during thermal pyrolysis in order to retain the shape due to the thickness of the part.

Item Type: Article (Journal)
Additional Information: 2397/49242
Uncontrolled Keywords: CoCrMo, MIM, wax, debinding, sintering
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: 28 Mar 2016 11:40
Last Modified: 16 Oct 2017 17:09
URI: http://irep.iium.edu.my/id/eprint/49242

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