Abstract：Cu-MoS2 self-lubricating coatings were prepared on high speed steel by electro-spark deposition (ESD) by electrode with drilled holes at the end of faces. The holes were filled with MoS2. The composition and micro morphology of the coatings were analysed. The effects of capacitance and deposition time on coating thickness were studied, and also the friction performance and wear mechanism were studied. The results show that there is nothing but MoS2 and Cu exist in the coating fabricated by this way. The micrographs show that the coating surface is uneven and many pores existing on the surface, showing typical characteristics of ESD; the surface quality is the best when it was prepared in the 3rd grade capacitance. Coating thickness firstly increases and then decreases with the increase of capacitance and deposition time. The self-lubricating coating prepared in the 3rd-grade capacitance has the lowest friction coefficient. The friction coefficients of the self-lubricating coatings prepared in the 1st and the 3rd grades stay almost constant with the increase of friction time. The friction coefficient of self-lubricating coatings prepared in the 5th grade show a clear upward trend when friction time increases. Scanning electron microscope images show shear-slip phenomenon on the wear surface.
曹同坤, 孙何, 王晓明. 采用端面带孔电极进行电火花沉积制备自润滑涂层[J]. 材料工程, 2017, 45(10): 88-94.
CAO Tong-kun, SUN He, WANG Xiao-ming. Self-lubricating Coating Prepared by Electro- spark Deposition Using Electrode with Drilled Holes at End Face. Journal of Materials Engineering, 2017, 45(10): 88-94.
 王海斗,徐滨士,刘家浚.固体润滑膜层技术与应用[M].北京:国防工业出版社,2009. WANG H D, XU B S, LIU J J. Technology and application of solid lubricating films[M]. Beijing:National Defense Industry Press, 2009.
 NIU M Y, BI Q L, YANG J, et al. Tribological performance of a Ni3Al matrix self-lubricating composite coating tested from 25 to 1000℃[J].Surface & Coatings Technology, 2012, 206(19/20):3938-3943.
 SEGU D Z, KIM J H, SI G C, et al. Application of Taguchi techniques to study friction and wear properties of MoS2 coatings deposited on laser textured surface[J]. Surface and Coatings Technology, 2013, 232(10):504-514.
 ESPALLARGASA N, VITOUXA L, ARMADA S. The wear and lubrication performance of liquid-solid self-lubricated coatings[J]. Surface and Coatings Technology, 2013, 235(11):342-353.
 AOUADI S M, PAUDEL Y, LUSTER B, et al. Adaptive Mo2N/MoS2/Ag tribological nanocomposite coatings for aerospace applicating[J].Tribology Letters,2008,29(2):95-103.
 谭英梅,曹国剑,李双,等.球磨制备轴承珠表面自润滑涂层及其摩擦性能[J].材料工程, 2015,43(9),19-24. TAN Y M, CAO G J, LI S, et al. Preparation and friction properties of self-lubricating layer on bearing balls by ball milling[J]. Journal of Materials Engineering, 2015, 43(9), 19-24.
 DENG J X, LIU J H, ZHAO J L, et al. Friction and wear behaviors of the PVD ZrN coated carbide in sliding wear tests and in machining processes[J].Wear, 2008, 264(3/4):298-307.
 DU J H, LI Z X, LIU G J, et al. Deposition and coating properties on CVD tungsten[J]. Materials Protection, 2004, 37(2):114-115.
 WANG H D, XU B S, LIU J J, et al. The friction-reduction model of the iron sulfide film prepared by plasma source ion sulfuration[J].Surface & Coating Technology, 2007, 201(9/11):5236-5239.
 朴钟宇,徐滨士,王海斗,等.涂层厚度对喷涂层疲劳磨损寿命的影响[J].摩擦学学报,2010, 30(5):448-452. PIAO Z Y, XU B S, WANG H D, et al. Experimental investigation of influence of thickness on contact fatigue lifetime of sprayed coatings[J]. Tribology, 2010, 30(5):448-452.
 杨胶溪,张健全,常万庆,等.激光熔覆WC/Ni基复合涂层高温滑动干摩擦磨损性能[J].材料工程,2016,44(6),110-116. YANG J X, ZHANG J Q, CHANG W Q, et al. High temperature dry sliding friction and wear performance of laser cladding WC/Ni composite coating[J]. Journal of Materials Engineering, 2016, 44(6), 110-116.
 PODCHERNYAEVA I A, PANASHENKO V M, PANASYUKA D, et al. Electric-spark hardening of VT3-1 titanium alloy with tungsten-free composite ceramics[J].Powder Metallurgy & Metal Ceramics, 2007, 46(9/10):442-448.
 罗成,董仕节,熊翔,等.电火花沉积表面处理技术的应用进展[J].表面技术,2009,38(4):53-56. LUO C, DONG S J, XIONG X. Application progress of electrospark deposition surfacing technology[J]. Surface Technology, 2009, 38(4):53-56.
 TKACHENKO Y G, YURCHENKO D Z, BRITUN V F, et al. Structure and properties of wear-resistant spark-deposited coatings produced with a titanium carbide alloy anode[J]. Powder Metallurgy and Metal Ceramics, 2013, 52(5/6):306-313.
 TANG J M. Mechanical and tribological properties of the TiC-TiB2 composite coating deposited on 40Cr-steel by electro spark deposition[J]. Applied Surface Science, 2016, 365(3):202-208.
 吴公一,张占领,孙凯伟,等. TA2表面电火花沉积Zr/WC复合涂层特性及界面行为研究[J].表面技术,2016,45(1):96-100. WU G Y, ZHANG Z L, SUN K W, et al. Coating Characters and interface behavior between TA2 and Zr/WC coating produced by electro-spark deposition[J]. Surface Technology, 2016, 45(1):96-100.
 ZHANG Y S, HAN Z, WANG K, et al. Friction and wear behaviors of nanocrystal-line surface layer of pure copper[J]. Wear, 2006, 260(9/10):942-948.
 STRAFFELINI G, PELLIZZARI M, MOLINARI A. Influence of load and temperature on the dry sliding behaviour of Al-based metal-matrix-composites against friction material[J]. Wear, 2004, 256(7/8):754-763.