Dry Sliding Wear Property of BN/Ti and BN/Ti-6Al-4V Alloy Composites Prepared by Spark Plasma Sintering

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  • 放電プラズマ焼結法で作製したBN/TiおよびBN/Ti-6Al-4V合金複合材の無潤滑すべり摩耗特性

Abstract

<p>Titanium and its alloys exhibit excellent in light weight, high specific strength and high corrosion resistance. Furthermore, they have good compatibility with CFRP using by aircraft in recent years as compared with aluminum. However, their processing cost and wear resistance are inferior to that of ferrous materials. In this research, to improve these properties, BN powder as the reinforcement material is added to two types of titanium powders (CP-Ti, Ti-6Al-4V alloy) which were used as the matrix materials. The titanium matrix composites (TMCs) were prepared using by a spark plasma sintering process (SPS). The dry sliding wear tests of the TMCs were carried out on a three-ball-on-disk machine using steel ball bearings as the counterpart material. As a result, the solid solution strengthening of nitrogen and the reaction products of TiB, TiN and Ti2N significantly increased the Vickers microhardness of TMCs, and the wear resistance was greatly improved. And it was found that the wear resistance of BN/CP-Ti was superior more than BN/Ti-6Al-4V due to much the solid solution amount of nitrogen and the deposition amount of dry sliding wear powder.</p>

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