Formation of self-lubricating PEO coating via in-situ incorporation of PTFE particles

IMR OpenIR

	Formation of self-lubricating PEO coating via in-situ incorporation of PTFE particles
	Chen, Y; Lu, XP; Blawert, C; Zheludkevich, ML; Zhang, T; Wang, FH; Lu, XP (reprint author), Helmholtz Zentrum Geesthacht, Inst Mat Res, Max Planck Str 1, D-21502 Geesthacht, Germany.; Zhang, T (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Corros & Protect Div, Wencui Rd 62, Shenyang 110016, Liaoning, Peoples R China.
	2018-03-15
发表期刊	SURFACE & COATINGS TECHNOLOGY
ISSN	0257-8972
卷号	337 页码:379-388
摘要	Self-lubricating plasma electrolytic oxidation (PEO) coatings have been fabricated on AZ91 magnesium alloy via in-situ incorporation of PTFE particles. Surfactants are used to improve dispersion stability of the particles in aqueous solution and relatively low energy input is applied to ensure the particles are inertly incorporated into the coating. It was found that the porous layer has been sealed significantly and PTFE-enriched ridge-like protrusions can be obtained on the coating surface after sufficient treatment time. 3D surface micro-topography was reconstructed to disclose the uptake of the particles and wear mechanisms of the coatings. The particle containing protrusions can act as lubricant reservoirs, leading to ultra-low and stable friction coefficient between the coating and its counterpart during entire dry sliding wear test. The formation of the ridge-like protrusions is related to micro-sized gas bubbles adherence to the coating surface due to high viscosity of the electrolyte. As a consequence, the intensity of electric field at the edge of the bubbles increases, which could facilitate rapid sintering and accumulation of PTFE particles at the electrolyte/gas/coating interface.; Self-lubricating plasma electrolytic oxidation (PEO) coatings have been fabricated on AZ91 magnesium alloy via in-situ incorporation of PTFE particles. Surfactants are used to improve dispersion stability of the particles in aqueous solution and relatively low energy input is applied to ensure the particles are inertly incorporated into the coating. It was found that the porous layer has been sealed significantly and PTFE-enriched ridge-like protrusions can be obtained on the coating surface after sufficient treatment time. 3D surface micro-topography was reconstructed to disclose the uptake of the particles and wear mechanisms of the coatings. The particle containing protrusions can act as lubricant reservoirs, leading to ultra-low and stable friction coefficient between the coating and its counterpart during entire dry sliding wear test. The formation of the ridge-like protrusions is related to micro-sized gas bubbles adherence to the coating surface due to high viscosity of the electrolyte. As a consequence, the intensity of electric field at the edge of the bubbles increases, which could facilitate rapid sintering and accumulation of PTFE particles at the electrolyte/gas/coating interface.
部门归属	[chen, yan ; lu, xiaopeng ; zhang, tao ; wang, fuhui] northeastern univ, shenyang natl lab mat sci, corros & protect div, 3-11 wenhua rd, shenyang 110819, liaoning, peoples r china ; [chen, yan ; lu, xiaopeng ; blawert, carsten ; zheludkevich, mikhail l.] helmholtz zentrum geesthacht, inst mat res, max planck str 1, d-21502 geesthacht, germany ; [chen, yan ; zhang, tao ; wang, fuhui] chinese acad sci, inst met res, shenyang natl lab mat sci, corros & protect div, wencui rd 62, shenyang 110016, liaoning, peoples r china ; [zheludkevich, mikhail l.] univ kiel, fac engn, kaiserstr 2, d-24143 kiel, germany
关键词	Plasma Electrolytic Oxidation Magnesium Alloy Az31 Mg Alloy Tribological Properties Ceramic Coatings Ti6al4v Alloy Behavior Wear Improvement Composites
学科领域	Materials Science, Coatings & Films ; Physics, Applied
资助者	Young Elite Scientists Sponsorship Program by CAST [2017QNRC001]; National Program for Young Top-notch Professionals; National Natural Science Foundation of China [U1737102, 51531007, 51771050]; Chinese Academy of Sciences; German Academic Exchange Service
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79426
专题	中国科学院金属研究所
通讯作者	Lu, XP (reprint author), Helmholtz Zentrum Geesthacht, Inst Mat Res, Max Planck Str 1, D-21502 Geesthacht, Germany.; Zhang, T (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Corros & Protect Div, Wencui Rd 62, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Chen, Y,Lu, XP,Blawert, C,et al. Formation of self-lubricating PEO coating via in-situ incorporation of PTFE particles[J]. SURFACE & COATINGS TECHNOLOGY,2018,337:379-388.
APA	Chen, Y.,Lu, XP.,Blawert, C.,Zheludkevich, ML.,Zhang, T.,...&Zhang, T .(2018).Formation of self-lubricating PEO coating via in-situ incorporation of PTFE particles.SURFACE & COATINGS TECHNOLOGY,337,379-388.
MLA	Chen, Y,et al."Formation of self-lubricating PEO coating via in-situ incorporation of PTFE particles".SURFACE & COATINGS TECHNOLOGY 337(2018):379-388.