石墨相尺寸与分布对镍-石墨可磨耗封严涂层摩擦学性能影响
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摘要
本文采用普通等离子喷涂(APS)与高效能超音速等离子喷涂(SAPS)两种工艺在2Cr13基体上制备75wt.%Ni+25wt.%石墨(Ni-C)可磨耗封严涂层,对涂层的摩擦学性能进行评价。结果表明:APS Ni-C涂层中石墨相的平均长度与宽度分别为11.4μm和5.4μm,而SAPS Ni-C涂层则分别为10.1μm和4.6μm,且分布更为均匀。石墨相尺寸对涂层性能具有显著的影响作用,表现为细小的石墨相更利于在涂层表面形成石墨润滑膜,使得SAPS涂层在60N载荷下与1Cr18Ni9Ti对磨90min过程中平均摩擦因数与APS涂层相比下降约28%,对磨材料1Cr18Ni9Ti单位时间磨损率降低了57%。
In this study, 75 wt.%Ni+25 wt.%graphite(Ni-C) abradable seal coatings were deposited by general atmospheric plasma spraying system(APS) and a high-efficiency supersonic atmospheric plasma spraying system(SAPS). The tribological properties of the coatings was then studied. The result showed that the average length and width of the graphite phase were 11.4μm and 5.4μm for the APS Ni-C coating, 10.1μm and 4.6μm for the SAPS Ni-C coating, respectively. The size of the graphite a prominent effect on the tribological property of coatings. The fine graphite phase was beneficial for the formation of lubricating film on the surface of the coating during friction and wear. Compared to APS Ni-C coating, the average friction coefficient of SAPS Ni-C coating was decreased by 28 %, and the wear rate of friction couple(1 Cr18 Ni9 Ti) was decreased by 57 % under a load of 60 N in 90 min.
In this study, 75 wt.%Ni+25 wt.%graphite(Ni-C) abradable seal coatings were deposited by general atmospheric plasma spraying system(APS) and a high-efficiency supersonic atmospheric plasma spraying system(SAPS). The tribological properties of the coatings was then studied. The result showed that the average length and width of the graphite phase were 11.4μm and 5.4μm for the APS Ni-C coating, 10.1μm and 4.6μm for the SAPS Ni-C coating, respectively. The size of the graphite a prominent effect on the tribological property of coatings. The fine graphite phase was beneficial for the formation of lubricating film on the surface of the coating during friction and wear. Compared to APS Ni-C coating, the average friction coefficient of SAPS Ni-C coating was decreased by 28 %, and the wear rate of friction couple(1 Cr18 Ni9 Ti) was decreased by 57 % under a load of 60 N in 90 min.
引文
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[15]C.H.Ding,C.H.Liu,Z.M.Yang,et al.Effect of size refinement and distribution of lubricants on friction coefficient of high temperature self-lubricating composites[J].Composites Science and Technology,2010,70:1000-1005.
[2]于方丽,白宇,吴秀英,等.等离子喷涂镍基可磨耗封严涂层抗腐蚀及耐磨性能分析[J].无机材料学报,2016,31(7):687-693.
[3]邢丕臣,刘建明,王志伟,等.可磨耗封严涂层抗中性盐雾腐蚀性能研究[J].热喷涂技术,2015,7(4):36-41.
[4]Maozhong Yi,Jiawen He,Baiyun Huang,et al.Friction and wear behaviour and abradability of abradable seal coating[J].Wear,1999,231:47-53.
[5]刘夙伟,李曙,刘阳.封严涂层材料及其可刮削性的评价[J].中国表面工程,2009,22(1):12-24.
[6]王刚,滕佰秋,王志宏,等.航空发动机上可磨耗封严涂层的应用及需求[J].热喷涂技术,2012,4(1):20-23.
[7]刘夙伟,高禩洋,李曙,等.Ni Cr W-BN气路封严涂层的可刮削性评价[J].材料研究学报,2010,24(4):406-410.
[8]章德铭,任先京,腾佰秋,等.可磨耗封严涂层性能评价技术研究进展[J].热喷涂技术,2009,1(2):19-22.
[9]Y.M.Zhong,B.Y.Huang,J.He Erosion wearbehaviour and model of abradable seal coating[J].Wear,2002,252:9-5.
[10]无九岭,李增喜,张伟刚.镍/石墨复合粉体及其热喷涂涂层新材料[J].过程工程学报,2007,7(6):1221-1228.
[11]尹春雷,陈美英,占佳,等.可磨耗封严涂层研究进展[J].航空制造技术,2008(20):92-94.
[12]欧献,邓畅光,王日初,等.超音速等离子喷涂涂层耐磨性能研究进展[J].材料导报,2013,27(21):104-114.
[13]J.J.Tang,K.Liu,Q.Z.Yang,et al.The influence of size and distribution of graphite on the friction and wear behavior of Nigraphite coatings[J].Surface&Coatings Technology,2014,252(252):48-55.
[14]C.H.Liu,C.H.Ding.Microstructure and tribological characterizations of Ni-basedself-lubricating coating[J].Wear,2009,268(2010):599-604.
[15]C.H.Ding,C.H.Liu,Z.M.Yang,et al.Effect of size refinement and distribution of lubricants on friction coefficient of high temperature self-lubricating composites[J].Composites Science and Technology,2010,70:1000-1005.