Tribological reactions generated on ceramic-stellite couples contaminated by SiO2 particles

Fin Lin Jen Fin Lin, Neng Cheng Yuh Neng Cheng

研究成果: Article同行評審


Stellite alloy to ceramic wear experiments were carried out on a test machine by means of a vanes-on-disk apparatus in which a disk specimen was pressed against three stationary vanes. This set-up was employed to investigate three-body abrasion of a Stellite disk against Si3N4 vanes, using SiO2 powder as the abrasive. The thermal effect on tribological behavior is evaluated in terms of wear loss, friction coefficient, wear mechanisms and the oxides generated at various operating temperatures. The role of SiO2 particles indicates that they have little influence on lowering the friction coefficient, but demonstrates an effect on wear. The experimental results show that wear loss is obviously related to the wear mechanisms exhibited at different temperatures, while the friction coefficient is dependent upon the oxide species and their quantity present in the wear process as well as the hardness of the Stellite, which varies with the specimen's operating temperature. Larger wear loss always results from the wear mechanism with cracking and/or surface delamination, while smaller wear loss is associated with surface grooving. The oxides of nickel and cobalt, which prevail at low temperatures but readily become unstable at high temperatures, favor a lower friction coefficient; the oxides of silicon and chromium, which tend to appear at high temperatures, do not favor a reduction in the friction coefficient. The SiO2 particles which get into the Stellite specimen at high temperatures can greatly improve wear the resistance.

頁(從 - 到)173-184
出版狀態Published - 1994 8月

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學
  • 材料力學
  • 表面和介面
  • 表面、塗料和薄膜
  • 材料化學


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