Dry sliding wear behaviour of Ti-TiB-TiN_x in-situ composite synthesised by reactive hot pressing
by J.I. Silva; A.C. Alves; A.M. Pinto; F.S. Silva; F. Toptan
International Journal of Surface Science and Engineering (IJSURFSE), Vol. 10, No. 4, 2016

Abstract: Ti and its alloys are attractive materials for a variety of fields; however, a major problem of Ti and its alloys is their poor wear resistance. It is known that reinforcing Ti with hard ceramic phases can substantially improve the wear resistance. Thus, Ti-TiB-TiN_x in-situ metal matrix composites were synthesised by reactive hot pressing utilising Ti/BN powder blends with 23:1 Ti:BN weight ratio. Ball-on-plate reciprocating dry sliding wear tests were performed against a 10 mm of alumina ball under 10 N normal load, at a frequency of 1 Hz, and with the total stroke length of 3 mm during 1,800 s. Results showed that the total wear volume loss was significantly decreased on the composite (11.4 ± 2.0 × 10⁻³ mm³) as compared to the unreinforced Ti (40.9 ± 4.2 × 10⁻³ mm³) due to the strengthening effect of the in-situ reinforcing phases.

Online publication date: Tue, 05-Jul-2016

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