Staff View: Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy

Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy

Wear on Co-Cr-Mo biomedical implants is still a major issue especially for applications in articulation joints like in total ankle, knee and hip arthroplasty. Generation of excessive wear particles can coagulate in body tissues which later cause inflammation, bone loss and necrosis. Modification of...

Full description

Saved in:

Bibliographic Details
Main Authors:	Izman, Sudin, Hassan, M. A., Abdul Kadir, Mohammed Rafiq, Abdullah, M. R., Anwar, Mahmood, Shah, A., Daud, Rosdi
Format:	Article
Published:	2012
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/46868/ http://dx.doi.org/10.4028/www.scientific.net/AMR.399-401.1564
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my.utm.46868
record_format	eprints
spelling	my.utm.468682017-09-26T03:02:26Z http://eprints.utm.my/id/eprint/46868/ Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy Izman, Sudin Hassan, M. A. Abdul Kadir, Mohammed Rafiq Abdullah, M. R. Anwar, Mahmood Shah, A. Daud, Rosdi TA Engineering (General). Civil engineering (General) Wear on Co-Cr-Mo biomedical implants is still a major issue especially for applications in articulation joints like in total ankle, knee and hip arthroplasty. Generation of excessive wear particles can coagulate in body tissues which later cause inflammation, bone loss and necrosis. Modification of implant surfaces is a common technique for increasing the hardness and thus minimizing these effects. In this study, thermal oxidation method was carried out on the Co-Cr-Mo to investigate the effects of different pretreatment processes and surface roughness on the hardness of oxide layer formed. Prior to oxidation process, all samples were annealed and pickled to remove residual stress and oxide scales respectively. The oxidation process was done inside furnace under atmospheric condition for 3 hours at 1160 °C. The metallic compositions, surface morphology and hardness of the oxide layer formed on the substrate were verified using X-ray diffraction (XRD), scanning electron microscope and micro-Vickers hardness analysis respectively. It is found that mechanical pretreatment provides oxide/carbide layer with higher hardness than chemical pretreatment method. It is believed that remnants of polishing diamond pastes trapped in roughness valleys react with metal matrix and later transform into carbides during oxidation process. In contrast, initial surface roughness of the substrate has no significant effect on the hardness of oxide/carbide layer. 2012 Article PeerReviewed Izman, Sudin and Hassan, M. A. and Abdul Kadir, Mohammed Rafiq and Abdullah, M. R. and Anwar, Mahmood and Shah, A. and Daud, Rosdi (2012) Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy. Advanced Materials Research, 399-40 . pp. 1564-1567. ISSN 1022-6680 http://dx.doi.org/10.4028/www.scientific.net/AMR.399-401.1564
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Izman, Sudin Hassan, M. A. Abdul Kadir, Mohammed Rafiq Abdullah, M. R. Anwar, Mahmood Shah, A. Daud, Rosdi Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy
description	Wear on Co-Cr-Mo biomedical implants is still a major issue especially for applications in articulation joints like in total ankle, knee and hip arthroplasty. Generation of excessive wear particles can coagulate in body tissues which later cause inflammation, bone loss and necrosis. Modification of implant surfaces is a common technique for increasing the hardness and thus minimizing these effects. In this study, thermal oxidation method was carried out on the Co-Cr-Mo to investigate the effects of different pretreatment processes and surface roughness on the hardness of oxide layer formed. Prior to oxidation process, all samples were annealed and pickled to remove residual stress and oxide scales respectively. The oxidation process was done inside furnace under atmospheric condition for 3 hours at 1160 °C. The metallic compositions, surface morphology and hardness of the oxide layer formed on the substrate were verified using X-ray diffraction (XRD), scanning electron microscope and micro-Vickers hardness analysis respectively. It is found that mechanical pretreatment provides oxide/carbide layer with higher hardness than chemical pretreatment method. It is believed that remnants of polishing diamond pastes trapped in roughness valleys react with metal matrix and later transform into carbides during oxidation process. In contrast, initial surface roughness of the substrate has no significant effect on the hardness of oxide/carbide layer.
format	Article
author	Izman, Sudin Hassan, M. A. Abdul Kadir, Mohammed Rafiq Abdullah, M. R. Anwar, Mahmood Shah, A. Daud, Rosdi
author_facet	Izman, Sudin Hassan, M. A. Abdul Kadir, Mohammed Rafiq Abdullah, M. R. Anwar, Mahmood Shah, A. Daud, Rosdi
author_sort	Izman, Sudin
title	Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy
title_short	Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy
title_full	Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy
title_fullStr	Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy
title_full_unstemmed	Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy
title_sort	effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy
publishDate	2012
url	http://eprints.utm.my/id/eprint/46868/ http://dx.doi.org/10.4028/www.scientific.net/AMR.399-401.1564
_version_	1643652164060446720
score	13.211869

Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy

Similar Items