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Adhesion failure behavior of sputtered calcium phosphate thin film coatings evaluated using microscratch testing

It is generally accepted that calcium phosphate (Cap) is one of the most important biomaterials in implant coating applications mainly because of its excellent bioactivity. However, its relatively poor mechanical properties limits its application. This entails that a better understanding of the mech...

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Main Authors: Toque, J.A., Herliansyah, M.K., Hamdi, M., Ide-Ektessabi, A., Sopyan, I.
Format: Article
Published: Elsevier 2010
Subjects:
Q Science (General)
Online Access:http://eprints.um.edu.my/14727/
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spelling my.um.eprints.147272019-03-18T04:45:07Z http://eprints.um.edu.my/14727/ Adhesion failure behavior of sputtered calcium phosphate thin film coatings evaluated using microscratch testing Toque, J.A. Herliansyah, M.K. Hamdi, M. Ide-Ektessabi, A. Sopyan, I. Q Science (General) It is generally accepted that calcium phosphate (Cap) is one of the most important biomaterials in implant coating applications mainly because of its excellent bioactivity. However, its relatively poor mechanical properties limits its application. This entails that a better understanding of the mechanical properties of a CaP coating is a must especially its behavior and the mechanisms involved when subjected to stresses which eventually lead to failure. The mechanical properties of the coating may be evaluated in terms of its adhesion strength. In this study, a radio frequency-magnetron (RF-MS) sputtering technique was used to deposit CaP thin films on 316L stainless steel (SS). The coatings were subjected to series of microscratch tests, taking careful note of its behavior as the load is applied. The adhesion behavior of the coatings showed varying responses. It was revealed that several coating process-related factors such as thickness, post-heat treatment and deposition parameters, to name a few, affect its scratching behavior. Scratch testing-related factors (i.e. loading rate, scratch speed, scratch load, etc.) were also shown to influence the mechanisms involved in the coating adhesion failure. Evaluation of the load-displacement graph combined with optical inspection of the scratch confirmed that several modes of failure occurred during the scratching process. These include trackside cracking, tensile cracking, radial cracking, buckling, delamination and combinations of one or more modes. (C) 2010 Elsevier Ltd. All rights reserved. Elsevier 2010 Article PeerReviewed Toque, J.A. and Herliansyah, M.K. and Hamdi, M. and Ide-Ektessabi, A. and Sopyan, I. (2010) Adhesion failure behavior of sputtered calcium phosphate thin film coatings evaluated using microscratch testing. Journal of the Mechanical Behavior of Biomedical Materials, 3 (4). pp. 324-330. ISSN 1751-6161
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
spellingShingle Q Science (General)
Toque, J.A.
Herliansyah, M.K.
Hamdi, M.
Ide-Ektessabi, A.
Sopyan, I.
Adhesion failure behavior of sputtered calcium phosphate thin film coatings evaluated using microscratch testing
description It is generally accepted that calcium phosphate (Cap) is one of the most important biomaterials in implant coating applications mainly because of its excellent bioactivity. However, its relatively poor mechanical properties limits its application. This entails that a better understanding of the mechanical properties of a CaP coating is a must especially its behavior and the mechanisms involved when subjected to stresses which eventually lead to failure. The mechanical properties of the coating may be evaluated in terms of its adhesion strength. In this study, a radio frequency-magnetron (RF-MS) sputtering technique was used to deposit CaP thin films on 316L stainless steel (SS). The coatings were subjected to series of microscratch tests, taking careful note of its behavior as the load is applied. The adhesion behavior of the coatings showed varying responses. It was revealed that several coating process-related factors such as thickness, post-heat treatment and deposition parameters, to name a few, affect its scratching behavior. Scratch testing-related factors (i.e. loading rate, scratch speed, scratch load, etc.) were also shown to influence the mechanisms involved in the coating adhesion failure. Evaluation of the load-displacement graph combined with optical inspection of the scratch confirmed that several modes of failure occurred during the scratching process. These include trackside cracking, tensile cracking, radial cracking, buckling, delamination and combinations of one or more modes. (C) 2010 Elsevier Ltd. All rights reserved.
format Article
author Toque, J.A.
Herliansyah, M.K.
Hamdi, M.
Ide-Ektessabi, A.
Sopyan, I.
author_facet Toque, J.A.
Herliansyah, M.K.
Hamdi, M.
Ide-Ektessabi, A.
Sopyan, I.
author_sort Toque, J.A.
title Adhesion failure behavior of sputtered calcium phosphate thin film coatings evaluated using microscratch testing
title_short Adhesion failure behavior of sputtered calcium phosphate thin film coatings evaluated using microscratch testing
title_full Adhesion failure behavior of sputtered calcium phosphate thin film coatings evaluated using microscratch testing
title_fullStr Adhesion failure behavior of sputtered calcium phosphate thin film coatings evaluated using microscratch testing
title_full_unstemmed Adhesion failure behavior of sputtered calcium phosphate thin film coatings evaluated using microscratch testing
title_sort adhesion failure behavior of sputtered calcium phosphate thin film coatings evaluated using microscratch testing
publisher Elsevier
publishDate 2010
url http://eprints.um.edu.my/14727/
_version_ 1643689887356944384
score 13.211869

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