"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Nanomechanical properties evaluation of bioactive glass coatings on titanium alloy substrate

C. Y. TANG1,* , C. P. TSUI1, DJ. JANACKOVIC2, P. S. USKOKOVIC2

Affiliation

  1. Department of Industrial and Systems Engineering, The Hong Kong Polytechnic Unversity, Hung Hom, Kowloon, Hong Kong, P.R. China
  2. Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia and Montenegro

Abstract

Bioinert metallic implants such as titanium and titanium alloys could be coated with bioactive materials with good adhesion to metal and which could be also bonded to the bone. In order to predict the mechanical behavior of coatings during the implant insertion, mechanical properties of the surface and through the thickness of deposited bioglass coatings are necessary to be studied. We report an investigation of the mechanical characteristics of bioglass coatings using the nanoindentation and nanoscratch techniques. The coating topography with residual imprints was analyzed by in situ imaging method. The dependence of the friction coefficient on load in constant and ramped load tests as well as on the scratch speed is compared. Elastic modulus and hardness results after indentation on the coating surface with higher loads showed more consistent results with less pile up around imprints. The nanohardness and reduced elastic modulus of the coating is in the expected boundaries of theoretical values for glass and alloy with a moderate distribution through.

Keywords

Bioglass coating, Nanoindentation, Nanoscratch.

Submitted at: Feb. 12, 2006
Accepted at: May 18, 2006

Citation

C. Y. TANG, C. P. TSUI, DJ. JANACKOVIC, P. S. USKOKOVIC, Nanomechanical properties evaluation of bioactive glass coatings on titanium alloy substrate, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 3, pp. 1194-1199 (2006)