Formation of Alumina Layer on Ti Alloy for Artificial Hip Joint

Rohit Khanna; Tomiharu Matsushita; Tadashi Kokubo; Hiroaki Takadama

doi:10.4028/www.scientific.net/KEM.614.200

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 614Formation of Alumina Layer on Ti Alloy for...

Formation of Alumina Layer on Ti Alloy for Artificial Hip Joint

Abstract:

The purpose of this research is to form a layer of alumina on Ti-6Al-4V alloy for hip joint by deposition of Al layer on the Ti alloy and its subsequent oxidation. In this work, a thick layer of Al was deposited onto the Ti alloy by cold spraying. The reaction layer of Al₃Ti was formed by heat treatment of cold sprayed Al at 640°C in air/Ar atmosphere to ensure a good adhesion between cold sprayed Al layer and the Ti alloy. A thick Al₃Ti layer formed by heat treatment of Al layer at 640°C for 12 h in air, was subjected to heat treatment at 850°C for 96 h in air to form a-alumina and Al₂Ti. Thus, alumina scales can be formed on the top surface of the Ti alloy and can be densified by increasing the time duration of heat treatment.

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Periodical:

Key Engineering Materials (Volume 614)

Pages:

200-205

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.614.200

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Online since:

June 2014

Authors:

Rohit Khanna*, Tomiharu Matsushita, Tadashi Kokubo, Hiroaki Takadama

Keywords:

Alumina, Heat Treatment, Hip Joint, Ti6Al4V

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