IJE TRANSACTIONS B: Applications Vol. 15, No. 2 (July 2002) 173-182   

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M. Ghorbani, A. Afshar, N. Ehsani and M. R. Saeri

Department of Materials Science and Engineering, Sharif University of Technology
Azadi Avenue, P. O. Box 11365- 9466, Tehran, Iran
ghorbani@sharif.edu.ac.ir - afshar@sharif.edu.ac.ir - msaeri@cc.iut.ac.ir

C. C. Sorrell

School of Materials Science and Engineering, University of New South Wales
Sydney, NSW 2052, Australia, C.Sorrell@unsw.edu.au

( Received: January 30, 2001 – Accepted in Revised Form: April 09, 2002 )

Abstract    Hydroxyapatite (HA), a material proven to be biocompatible within the human body, has been produced to a high level of purity. This material has been applied as a coating on Ti-6Al-4V alloy by using the air plasma spraying technique. The coat was characterizted with SEM, XRD, FTIR and Raman spectroscopy methods to consist of a mixture of calcium phosphates including HA mainly and traces of tricalcium phosphate, tetra calcium phosphate and calcium oxide phases. This HA phase was dehydrated and partially decomposed to oxyapatite and amorphous HA. EPMA method was used cross-sectionally on the interface in order to determine the depth profiles and elemental maps of Calcium, Phosphorous, Oxygen, Titanium, Vanadium and Aluminum elements. The results clearly showed the evidence of interdiffusion at the interface. Ultimately, the diffusion depth of each element was studied and compared with each other.


Keywords    Hydroxyapatite, Coat, Plasma Spraying, Interface



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