Some tribological properties of a carbon-derived Si 3N 4/SiC nanocomposite
Some tribological properties of a recently developed carbon derived Si 3N 4/SiC nanocomposite have been investigated in the contribution. The material was tested in the pin-on-disc configuration, with Si 3N 4 and diamond pins, under unlubricated sliding conditions. The investigated variables were lo...
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Published in | Journal of the European Ceramic Society Vol. 24; no. 12; pp. 3431 - 3435 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
2004
|
Subjects | |
Online Access | Get full text |
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Summary: | Some tribological properties of a recently developed carbon derived Si
3N
4/SiC nanocomposite have been investigated in the contribution. The material was tested in the pin-on-disc configuration, with Si
3N
4 and diamond pins, under unlubricated sliding conditions. The investigated variables were load, sliding distance, and humidity. The measured friction coefficients at 50% humidity and by using a Si
3N
4 pin were in the range of 0.6–0.7 and 0.05–0.07 when using a diamond pin. The value of this coefficient in vacuum was of about 0.6. A reduction of humidity resulted in lower friction coefficients, but the wear resistance in vacuum was significantly lower than that in air. Increasing the testing temperature (up to 500 °C) increased both, the friction and wear coefficient values. The wear patterns on the Si
3N
4+SiC disc in the pin-on-disc test with Si
3N
4 ball revealed presence of the tribochemical reaction layers formed by SiO
2. Mechanical fracture was the wear controlling mechanism in all tested conditions. |
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ISSN: | 0955-2219 1873-619X |
DOI: | 10.1016/j.jeurceramsoc.2003.10.029 |