The overall objective of this study is to introduce a wear map of ceramics which shows the regions of dominant wear modes obtained in a wide range of materials and operating conditions by modeling. In this report, wear modes of various ceramic materials observed under a wide range of experimental conditions are classified experimentally. For this purpose, friction and wear tests are carried out on three kinds of ceramics sliding against themselves under various contact pressures, sliding velocities and temperatures. Sliding wear phenomena of ceramics observed in all tests can be classified into two types called 'mild wear' and 'severe wear' based on the ratio of worn surface roughness, Ry, to mean grain size, Dg. Specific wear amount is always less than 10-6 mm3/Nm when worn surface roughness becomes relatively smooth (Ry/Dg<0.2) compared with mean grain size in the mild wear region as a result of running in, nevertheless, relatively rough wear surface (Ry/Dg < 0.5) in the severe wear region gives a wear rate larger than 10-6 mm3/Nm. The transition from the mild wear to the severe wear occurs when normal load, sliding velocity or temperature attain a certain value. The quantitative region of each wear mode is clearly shown in the load-sliding velocity diagram and load-temperature diagram, experimentally.
|Number of pages||9|
|Journal||Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C|
|Publication status||Published - 1997 Jan 1|
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering