ISSN:
1573-2711
Keywords:
alumina matrix composites
;
high temperature
;
friction and wear
;
sintering aids
;
solid lubricants
;
self-lubricating
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Ten kinds of self-lubricating composites with different amounts of sintering aids and solid lubricants in Al2O3 matrix were fabricated by hot-pressed sintering. Their friction and wear behaviours in unlubricated sliding against Al2O3 were tested by using a pin-on-disk wear tester at 650°C. It was shown that the amount of sintering aids strongly affected friction coefficient and wear rate of the Al2O3–20Ag20CaF2 composite, the appropriate amount of sintering aids was 10 wt% for beneficial effect on the reduction of wear at 650°C. Also it was shown that the addition of equal quantities of Ag and CaF2 in Al2O3 matrix can promote the formation of the well-covered lubricating film, and effectively reduce the friction and wear. The composite with 40 wt% of lubricants (20 wt% Ag, 20 wt% CaF2) presented an optimum tribological behavior at 650°C (friction coefficient μ is about 0.3, wear rates are about 4 x 10-6 mm3/N,m and 5 x 10-7 mm3/N,m for the disk and pin, respectively).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1019195120042
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