Abstract：Using molded-leaching and high temperature vacuum melting technologies, the self-sweating lubrication wear-resistance porous CF/PTFE/PEEK composites were prepared. The effects of porogen (NaCl), PTFE content and the distance between each of two CF layers on porous PEEK composite material structure and tribological behavior were investigated. The results show that the porous CF/PTFE/PEEK composite material contains 20% (mass fraction,the same below) PTFE, 30% NaCl and the distance between two CF layers of 0.4mm has the lowest friction coefficient and wear rate. When load is 200N, comparing with classic CF/PEEK composites, the friction coefficient of the porous CF/PTFE/PEEK composite decreases 9 times and wear resistance increased by 25 times. PTFE in the porous composites can form continuous transfer films which reduce the friction coefficient, and the porous structure can store certain lubricant grease which results in stable lubricating oil film during sliding. Thereby, above mentioned advantages significantly reduce the friction and wear rate of porous sweating composite. In addition, the carbon fiber cloth shows the role of skeleton supporting effect, and also cooperating with PTFE, NaCl to improve the wear resistance of porous PEEK composite material.
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