Chapter 60. Mechanical Alloying of Mo and Si Powders and Their Sintering
- John B. Wachtman Jr.
Published Online: 26 MAR 2008
Copyright © 1993 The American Ceramic Society
Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10
How to Cite
Yang, X. and Rahaman, M. N. (2008) Mechanical Alloying of Mo and Si Powders and Their Sintering, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314234.ch60
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1993
Print ISBN: 9780470375273
Online ISBN: 9780470314234
- metallic contamination;
The preparation of MoSi2 powders by the mechanical alloying of Mo and Si powders in a high speed ball mill was investigated. The phase composition, crystal structure and powder characteristics were studied as functions of the milling conditions. Single phase MoSi2 powders with a particle size of 0.1–1 μm and a crystallite size of =20 nm were prepared. The free sintering behavior of the compacted powders was studied under controlled heating conditions in a helium atmosphere. The MoSi2 powder reached a density of >95% of the theoretical after heating for 1 hour at 1600° C. Addition of 1 wt% of carbon produced an increase in density to >98%. The phase composition of the sintered body was primarily tetragonal MoSi2 containing a small amount of a Si-rich phase. The grain size of the M0Si2 phase ≈ 1–3 μm.