Some tribological properties of a carbon-derived Si3N4/SiC nanocomposite
Some tribological properties of a recently developed carbon derived Si3N4/SiC nanocomposite have been investigated in the contribution. The material was tested in the pin-on-disc configuration, with Si3N4 and diamond pins, under unlubricated sliding conditions. The investigated variables were load,...
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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 | Conference Proceeding Journal Article |
Language | English |
Published |
Oxford
Elsevier
2004
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Subjects | |
Online Access | Get full text |
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Summary: | Some tribological properties of a recently developed carbon derived Si3N4/SiC nanocomposite have been investigated in the contribution. The material was tested in the pin-on-disc configuration, with Si3N4 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 Si3N4 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 500NBDGC) increased both, the friction and wear coefficient values. The wear patterns on the Si3N4+SiC disc in the pin-on-disc test with Si3N4 ball revealed presence of the tribochemical reaction layers formed by SiO2. Mechanical fracture was the wear controlling mechanism in all tested conditions. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0955-2219 1873-619X |
DOI: | 10.1016/j.jeurceramsoc.2003.10.029 |