等离子喷涂Cr_3C_2-NiCr及其表面化学镀Ni涂层的摩擦学特性  

Tribological Properties of Plasma-Sprayed Cr_3C_2-NiCr Coating without or with Electroless Plated Ni

作　　者：李剑锋[1] 黄静琪[1] 丁传贤[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《无机材料学报》2001年第1期103-109,共7页Journal of Inorganic Materials

摘　　要：考察了等离子喷涂Ｃｒ３Ｃ２－ＮｉＣｒ涂层及其表面化学镀Ｎｉ镀层通过不同配副组成摩擦副的摩擦学特性，并应用ＳＥＭ、ＸＲＤ和ＸＰＳ对磨痕进行了分析．结果发现：等离子喷涂Ｃｒ３Ｃ２－ＮｉＣｒ涂层及其表面化学镀Ｎｉ镀层自配副组成摩擦副，均表现出较大的摩擦系数和磨损系数；但是，Ｃｒ３Ｃ２－ＮｉＣｒ涂层表面化学镀Ｎｉ镀层与Ｃｒ３Ｃ２－ＮｉＣｒ涂层配副组成摩擦副，在于摩擦条件下，能达到０．１２的摩擦系数和接近１０－６ｍｍ３（Ｎｍ）－１的磨损系数．上述结果是由于Ｃｒ３Ｃ２－ＮｉＣｒ涂层的磨损机理从强烈的层状颗粒剥落转变为沿气孔和微裂纹等处的颗粒断裂．Tribological properties of plasma-sprayed Cr3C2-NiCr coatings without or with electroless plated Ni were investigated, and the worn surfaces were analyzed by employing SEM, XRD and XPS. It was found that both the self-mated rubbing pairs consisting of the Cr3C2-NiCr coating and the Cr3C2-NiCr coating electroless plated with Ni displayed higher friction coefficient and wear coefficient. However, The rubbing pair of the Cr3C2-NiCr coating electroless plated with Ni against the Cr3C2-NiCr coating had a friction coefficient of 0.12 and a wear coefficient close to 10-6mm3(Nm)-1 even if under dry sliding. The improvement in tribological properties could be attributed to that the wear mechanism of Cr3C2-NiCr coating transformed to particle fracturing along pores and microcracks from the intensive spalling along splat interfaces.

关 键 词：等离子喷涂 CR3C2-NICR涂层 化学镀镍 摩擦学特性 

分 类 号：TG174.442[金属学及工艺—金属表面处理]