Surface Engineering to Improve Tribological Performance of Gamma Based Titanium Aluminides

  1. Prof. Dr. G. Müller
  1. Ahmad Reza Rastkar and
  2. Tom Bell

Published Online: 27 APR 2006

DOI: 10.1002/3527607293.ch69

Ceramics - Processing, Reliability, Tribology and Wear, Volume 12

Ceramics - Processing, Reliability, Tribology and Wear, Volume 12

How to Cite

Rastkar, A. R. and Bell, T. (2000) Surface Engineering to Improve Tribological Performance of Gamma Based Titanium Aluminides, in Ceramics - Processing, Reliability, Tribology and Wear, Volume 12 (ed G. Müller), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607293.ch69

Editor Information

  1. Fraunhofer-Institut für Silicatforschung, Neunerplatz 2, 97082 Würzburg, Germany

Author Information

  1. School of Metallurgy and Materials, The University of Birmingham, Birmingham, UK

Publication History

  1. Published Online: 27 APR 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301942

Online ISBN: 9783527607297

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Keywords:

  • ceramics;
  • plasma nitriding;
  • titanium aluminides;
  • TiN;
  • Ti2AlN

Summary

Titanium aluminide with the composition of Ti-48Al-2Nb-2Mn was plasma nitrided to modify the surface conditions. The effects of nitriding temperature, nitriding time and H2/N2 gas ratio were investigated. The microstructure and phases of the nitrided layers on the surface were studied by optical and electron microscopy, X-ray diffraction (XRD) and glow discharge spectroscopy (GDS). The samples were wear tested using a ball-on-disc configuration. Experimental results indicated that nitriding temperature and time control the thickness, and the H2/N2 ratio is responsible for the crystal structure of the nitrided layers. The nitrided compound layers consist of TiN and Ti2AlN phases. The diffusion zone, in most cases is comprised of recrystallised gamma grains beneath the compound layer.