模拟深海环境下超高分子量聚乙烯及其复合材料的摩擦磨损行为研究
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摘要
使用自行设计的高压摩擦磨损试验机考察超高分子量聚乙烯及其碳纤维、玻璃纤维填充复合材料在模拟深海环境下的摩擦磨损性能,并研究海水静压对材料吸水率、化学稳定性以及塑化作用的影响规律。研究表明,海水静压对边界润滑段的摩擦因数影响很小,但显著增大了弹流段的摩擦因数;吸水过程增大了超高分子量聚乙烯及其复合材料在静压下的磨损率,其原因可能在于静压增大了材料的吸水率,影响了材料的化学稳定性并加速了材料的塑化;碳纤维、玻璃纤维均有助于提升超高分子量聚乙烯在海水静压下的耐磨性能,其中,碳纤维填充高分子量聚乙烯在海水静压下的耐磨性能优于玻璃纤维填充高分子量聚乙烯,其磨损率基本不受海水静压影响。
The friction and wear behaviors of UHMWPE and its composites filled by carbon fiber and glass fiber respectively were investigated by a self-designed friction test,by which the deep sea environment was simulated. The influence of seawater hydrostatic pressure on seawater absorption,chemical stability and plastication effect was further studied. The results show that hydrostatic pressure significantly increases the friction coefficient of the hydrodynamic region,while it has little influence on that of the boundary lubrication region. After saturated in seawater under specific hydrostatic pressure,the wear rate of UHMWPE and its composites is increased. The decreased anti-wear performance is possibly a combined effect of increased seawater absorption,damaged chemical stability and accelerated plastication effect. Both carbon fiber and glass fiber can improve the anti-wear performance of the UHMWPE matrix. The wear rate of the composite filled by carbon fiber is almost unaffected by the applied hydrostatic pressure,which is much lower than that of the composite filled by glass fiber.
The friction and wear behaviors of UHMWPE and its composites filled by carbon fiber and glass fiber respectively were investigated by a self-designed friction test,by which the deep sea environment was simulated. The influence of seawater hydrostatic pressure on seawater absorption,chemical stability and plastication effect was further studied. The results show that hydrostatic pressure significantly increases the friction coefficient of the hydrodynamic region,while it has little influence on that of the boundary lubrication region. After saturated in seawater under specific hydrostatic pressure,the wear rate of UHMWPE and its composites is increased. The decreased anti-wear performance is possibly a combined effect of increased seawater absorption,damaged chemical stability and accelerated plastication effect. Both carbon fiber and glass fiber can improve the anti-wear performance of the UHMWPE matrix. The wear rate of the composite filled by carbon fiber is almost unaffected by the applied hydrostatic pressure,which is much lower than that of the composite filled by glass fiber.
引文
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[3]马晓峰,刘昊,王建章.赛龙SXL在海水环境下的吸湿和摩擦学行为[J].润滑与密封,2016,41(5):91-96.MA X F,LIU H,WANG J Z.Water absorption and tribological properties of thordon SXL under sea water condition[J].Lubrication Engineering,2016,41(5):91-96.
[4]陈松,高万振,段海涛.水深对POM摩擦学性能的影响[J].摩擦学学报,2014,34(3):225-232.CHEN S,GAO W Z,DUAN H T.Effect of water depth on the tribological properties of polyoxymethylene[J].Tribology,2014,34(3):225-232.
[5]董从林,白秀琴,严新平,等.海洋环境下的材料摩擦学研究进展与展望[J].摩擦学学报,2013,33(3):311-320.DONG C L,BAI X Q,YAN X P,et al.Research status and advances on tribological study of materials under ocean environment[J].Tribology,2013,33(3):311-320.
[6]DAVIES P,EVRARD G.Accelerated ageing of polyurethanes for marine applications[J].Polymer Degrab Stab,2007,92(8):1455-1464.
[7]WANG J,CHEN J,CHEN B,et al.Wear behaviors and wear mechanisms of several alloys under simulated deep-sea environment covering seawater hydrostatic pressure[J].Tribology International,2012,56:38-46.
[8]BRISCOE B J,PARRY E J,TABOR D.The friction of polymers under hydrostatic pressure[J].Wear,1974,30(1):127-134.
[9]EDIDIN A A,KURTZ S M.Influence of mechanical behavior on the wear of 4 clinically relevant polymeric biomaterials in a hip simulator[J].Journal of Arthroplasty,2000,15(3):321-331.
[10]ELLIOTT A.Infra-red spectra and structure of organic longchain polymers[M].London:St.Martin,1969.
[11]BRAITHWAITE G,SPIEGELBERG S,KOZAK A.Characterization of physical,chemical,and mechanical properties of UHMWPE[M].Amsterdam:Elsevier Inc.,2004.
[12]YAMAMOTO Y,TAKASHIMA T.Friction and wear of water lubricated PEEK and PPS sliding contacts[J].Wear,2002,253(7):820-826.
[13]YAMAMOTO Y,HASHIMOTO M.Friction and wear of water lubricated PEEK and PPS sliding contacts:Part 2.composites with carbon or glass fibre[J].Wear,2004,257(1):181-189.