Chapter 34. Wear Performance of Ceramics in Ring/Cylinder Applications
- John B. Wachtman Jr
Published Online: 26 MAR 2008
Copyright © 1988 The American Ceramics Society, Inc.
12th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 9/10
How to Cite
Dufrane, K. F. (1988) Wear Performance of Ceramics in Ring/Cylinder Applications, in 12th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310502.ch34
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1988
Print ISBN: 9780470374818
Online ISBN: 9780470310502
- plasma-sprayed coatings;
- valve mechanisms
In support of efforts to apply ceramics to advanced heat engines, a study was performed of the wear mechanisms of ceramics at the ring/cylinder interface. A laboratory apparatus was constructed to reproduce most of the conditions of an actual engine, but used simple ring and cylinder specimens to facilitate their fabrication. Attempts to operate three zirconias, αSiC, Si3N4, and several plasma-sprayed coatings without lubrication were unsuccessful because of high friction and wear rates. The ceramics responded well to liquid lubricants at a temperature of 260°C. Plasma-sprayed coatings of Cr2O3 and hypersonic flame-sprayed coatings of cobalt-bonded WC performed particularly well as ring coatings. Similar performance was obtained with these coatings operating against SiC, Si3N4, SiC whisker-reinforced Al2O3, and Cr2O3 coatings. The study demonstrated the critical need for lubrication.