Friction bearing composite material with a metal base layer
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United States of America Patent
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Jul 31, 2007
Grant Date -
Jul 1, 2004
app pub date -
May 31, 2002
filing date -
May 31, 2001
priority date (Note) -
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Abstract
A friction bearing composite material comprises a metal base layer, a porous support layer applied thereto, and a low friction layer made from PTFE forming a bearing surface for a bearing partner. The low friction material forming the sliding surface also fills the pores in the support layer and comprises at least 60 vol. % PTFE and 10-25 vol. % zinc sulphide. In order to achieve a high wear resistance with a low coefficient of friction, the low friction material further comprises 1.5-3.5 vol. % carbon fibers and 1-7 vol. % PFA.
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