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.
[1] PEI X Q, FRIEDRICH K. Sliding wear properties of PEEK, PBI and PPP[J]. Wear, 2012, 274-275(27):452-455.
[2] TANG Q G, CHEN J T, LIU L P. Tribological behaviours of carbon fibre reinforced PEEK sliding on silicon nitride lubricated with water[J]. Wear, 2010, 269(7-8):541-546.
[3] WANG H Y, ZHU Y J, FENG X, et al. The effect of self-assembly modified potassium titanate whiskers on the friction and wear behaviors of PEEK composites[J]. Wear, 2010, 269(1-2):139-144.
[4] BRISCOE B J, YAO L H, STOLARSKI T A. The friction and wear of PTFE-PEEK composites: an initial appraisal of the optimum composition[J]. Wear, 1986, 108(4):357-374.
[5] LU Z P, FRIEDRICH K. On sliding friction and wear of PEEK and its composites[J]. Wear, 1995, 181-183(2):624-631.
[6] FERNANDEZ R E, MINONDO I, GARCIA C D. The effectiveness of PTFE nanoparticle powder as an EP additive to mineral base oils[J]. Wear, 2007, 262(11-12):1399-1406.
[7] WANG Y J, LIU Z M. Tribological properties of high temperature self-lubrication metal ceramics with an interpenetrating network[J]. Wear, 2008, 265(11-12):1720-1726.
[8] WONG J C H, TERVOORT E, BUSATO S, et al. Controlling phase distributions in macroporous composite materials through particle-stabilized foams[J]. Langmuir, 2011, 27(7):3254-3260.
[9] GEBHARD A, BAYERL T, SCHLARB A K, et al. Increased wear of aqueous lubricated short carbon fiber reinforced polyetheretherketone (PEEK/SCF) composites due to galvanic fiber corrosion[J]. Wear, 2010, 268(7-8):871-876.
[10] SURESH A, HARSHA A P, GHOSH M K. Solid particle erosion of unidirectional fibre reinforced thermoplastic composites[J]. Wear, 2009, 267(9-10):1516-1524.
[11] CHU X X, WU Z X, HUANG R J, et al. Mechanical and thermal expansion properties of glass fibers reinforced PEEK composites at cryogenic temperatures[J]. Cryogenics, 2010, 50(2):84-88.
[12] EVANS S L, GREGSON P J. Composite technology in load-bearing orthopaedic implants[J]. Biomaterials, 1998, 19(15):1329-1342.
[13] ALMAJID A, FRIEDRICH K, FLOECK J, et al. Surface damage characteristics and specific wear rates of a new continuous carbon fiber (CF)/polyetheretherketone (PEEK) composite under sliding and rolling contact conditions[J]. Appl Compos Mater, 2011, 18(3):211-230.
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