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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...

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Main Authors:	S., Izman, M. A., Hassan, Mas Ayu, Hassan, Mohammed Rafiq, Abdul Kadir, Mohammed Ruslan, Abdullah, Mahmood, Anwar, A., Shah, R., Daud
Format:	Article
Language:	English
Published:	Trans Tech Publications, Switzerland 2012
Subjects:	T Technology (General) TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/28110/1/Effect%20of%20pretreatment%20process%20on%20thermal%20oxidation%20of%20biomedical%20.pdf http://umpir.ump.edu.my/id/eprint/28110/ https://doi.org/10.4028/www.scientific.net/AMR.399-401.1564
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id	my.ump.umpir.28110
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spelling	my.ump.umpir.281102020-05-05T07:53:22Z http://umpir.ump.edu.my/id/eprint/28110/ Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy S., Izman M. A., Hassan Mas Ayu, Hassan Mohammed Rafiq, Abdul Kadir Mohammed Ruslan, Abdullah Mahmood, Anwar A., Shah R., Daud T Technology (General) TJ Mechanical engineering and machinery 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. Trans Tech Publications, Switzerland 2012 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/28110/1/Effect%20of%20pretreatment%20process%20on%20thermal%20oxidation%20of%20biomedical%20.pdf S., Izman and M. A., Hassan and Mas Ayu, Hassan and Mohammed Rafiq, Abdul Kadir and Mohammed Ruslan, Abdullah and Mahmood, Anwar and A., Shah and R., Daud (2012) Effect of pretreatment process on thermal oxidation of biomedical grade cobalt based alloy. Advanced Materials Research, 399-401. pp. 1564-1567. ISSN 1022-6680 (print), 1662-8985 (online) https://doi.org/10.4028/www.scientific.net/AMR.399-401.1564
institution	Universiti Malaysia Pahang
building	UMP Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaysia Pahang
content_source	UMP Institutional Repository
url_provider	http://umpir.ump.edu.my/
language	English
topic	T Technology (General) TJ Mechanical engineering and machinery
spellingShingle	T Technology (General) TJ Mechanical engineering and machinery S., Izman M. A., Hassan Mas Ayu, Hassan Mohammed Rafiq, Abdul Kadir Mohammed Ruslan, Abdullah Mahmood, Anwar A., Shah R., Daud 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	S., Izman M. A., Hassan Mas Ayu, Hassan Mohammed Rafiq, Abdul Kadir Mohammed Ruslan, Abdullah Mahmood, Anwar A., Shah R., Daud
author_facet	S., Izman M. A., Hassan Mas Ayu, Hassan Mohammed Rafiq, Abdul Kadir Mohammed Ruslan, Abdullah Mahmood, Anwar A., Shah R., Daud
author_sort	S., Izman
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
publisher	Trans Tech Publications, Switzerland
publishDate	2012
url	http://umpir.ump.edu.my/id/eprint/28110/1/Effect%20of%20pretreatment%20process%20on%20thermal%20oxidation%20of%20biomedical%20.pdf http://umpir.ump.edu.my/id/eprint/28110/ https://doi.org/10.4028/www.scientific.net/AMR.399-401.1564
_version_	1669007764800667648
score	13.211869

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

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