Effect of Al2O3 Reinforcement and Al2O3–13 wt% TiO2 Bond Coat on Plasma Sprayed Hydroxyapatite Coating

Manoj Mittal; S. K. Nath; Satya Prakash

doi:10.14429/dsj.62.1039

Manoj Mittal Indian Institute of Technology Roorkee, Roorkee
S. K. Nath Indian Institute of Technology Roorkee, Roorkee
Satya Prakash Indian Institute of Technology Roorkee, Roorkee

DOI: https://doi.org/10.14429/dsj.62.1039

Keywords: Bond coat, AISI 316 L stainless steel, microhardness, bond strength

Abstract

In present work an attempt has been made to enhance mechanical properties of plasma sprayed hydroxyapatite coating by addition of 10 wt% aluminum oxide. A bond coat of Al2O3-13TiO2 has been applied to improve strength of hydroxyapatite composite coating. Mechanical properties of coatings with addition of alumina and with incorporation of bond coat have been investigated in accordance with the ASTM C 633-79. Results indicate that the tensile bond strength of hydroxyapatite coating increased by 13 per cent by alumina reinforcement and 25 per cent by both reinforcement and application of bond layer respectively. The area of adhesive failure was found to decrease for hydroxyapatite-alumina composite coating and hydroxyapatite composite coating with bond coat as compared to pure hydroxyapatite coating. The microharness of specimens was found to increase with reinforcement, however the highest hardness was recorded for bond coat. The microhardness was found to decrease with distance from substrate coating interface.

Defence Science Journal, 2012, 62(1), pp.193-198, DOI:http://dx.doi.org/10.14429/dsj.62.1039

Author Biographies

Manoj Mittal, Indian Institute of Technology Roorkee, Roorkee

Dr Manoj Mittal has recently did his PhD from Department of Metallurgical and Materials Engineering, IIT, Roorkee. Presently he is working as professor in Department of Mechanical Engineering, AIET, Faridkot. He has more than 15 years of teaching experience.

S. K. Nath, Indian Institute of Technology Roorkee, Roorkee

Dr S.K. Nath is presently working as Professor in the Department of Metallurgical and Materials Engineering, IIT Roorkee with additional charge of Head of Department of Nanotechnology, IIT Roorkee.

Satya Prakash, Indian Institute of Technology Roorkee, Roorkee

Dr Satya Prakash is presently working as Emeritus Fellow in the Department of Metallurgical and Materials Engineering, Indian Institute of Technology (IIT) Roorkee. He has more than 300 publications in national and international journals and conferences. He had been awarded Nace corrosion award.

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