Triboemission, tribochemical reaction, and friction and wear in ceramics under various n-butane gas pressures |
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Authors: | Keiji Nakayama Hiroshi Hashimoto |
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Affiliation: | aMechanical Engineering Laboratory, Namiki 1-2, Tsukuba, Ibaraki 305 Japan;bComtec, Inc., 3-22-10, Shimorenjyaku, Mitaka, 181 Japan |
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Abstract: | The triboemission behaviour of negatively and positively charged particles and photons generated by scratching a Si3N4 disc with a conical diamond stylus was studied under various gas pressures of n-butane as a model compound of typical paraffinic lubricating oil. The triboemission behaviour of photon emission in a frictional system of an Al2O3 ball sliding on Al2O3 and Si3N4 discs was also measured under various n-butane gas pressures. Further, the friction and wear in the frictional system of an Al2O3 ball sliding on an Si3N4 disc were studied under various n-butane gas pressures. The triboemission intensities of three kinds of energetic particles, negatively and positively charged particles and photons, become a maximum at a particular n-butane gas pressure. When the n-butane gas pressure is such that triboemission is a maximum, the formation of friction polymer-like high molecular weight products is at a maximum, and friction and wear of the ball decreases to a minimum. It has been concluded that the friction polymer-like high molecular weight products are formed through tribochemical reactions triggered by triboemission phenomena and help reduce the friction and wear of the solids. |
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Keywords: | Author Keywords: triboemission charged particle electron ion photon friction wear Al2O3 Si3N4 tribochemical reaction friction polymer |
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