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Abstract: The load dependency of sliding friction behavior in SiC-particulate
reinforced 6061 aluminum alloy against carbon matrix composite is
investigated, on a disk-block type friction tester, under sliding
velocity 30 m/s and normal load (pressure) range from 0.1 MPa to 0.8 MPa.
Effects of pressure on the randomly undulating behavior of friction
coefficient, the transition behavior in initial stage of friction
process as well as the state of frictional surface are observed and
analyzed. Discussions are focused on laws with respected to pressure pn
of the mean mav, the normal deviation s of friction coefficient in
relatively steady period, as well as the time of transition period t*
and the initial value m0. The results showed that with pn increasing t*
linearly reduces, m0 essentially remains constant, mav changes with
non-monotone form, which quickly increasing in range of pn < 0.25 MPa
and slowly reducing when pn larger than this pressure, and s appears
similar tendency changing with mav.
Key words: Aluminum matrix composite Sliding friction Load dependency
CLC No: TH117
国家自然科学基金(59672029)和清华大学新型陶瓷与精细工艺国家重点实验室开放课题基金资助项目.
Received 20011012, received in revised form 20020610
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