ZL101表面电火花沉积Zr基非晶涂层的组织结构  

Microstructure of Electro-spark Deposition Zr-based Amorphous Coating on ZL101

作　　者：何艳玲[1] 王彦芳[1] 司爽爽 宋增金 孙旭[1] 石志强[1] HE Yan-ling;WANG Yan-fang;SI Shuang-shuang;SONG Zeng-jin;SUN Xu;SHI Zhi-qiang(Department of Materials Science and Engineering,China University of Petroleum(East China),Qingdao 266580,China;Shandong Special Equipment Inspection Institute Rizhao Branch,Rizhao 276826,China)

机构地区：[1]中国石油大学(华东)材料科学与工程系,山东青岛266580 [2]山东省特检院日照分院,山东日照276826

出　　处：《表面技术》2018年第7期236-240,共5页Surface Technology

基　　金：山东省自然科学基金(ZR2014EMM006);广西大学广西有色金属及特色材料加工重点实验室开放基金(GXKFJ16-09)~~

摘　　要：目的提高铝合金材料的表面性能,开拓非晶涂层的应用。方法以直径为2 mm的Zr55Al10Ni5Cu30非晶合金棒为电极,采用电火花沉积技术在氩气保护下沉积两遍,在ZL101A铝合金表面制备非晶沉积层。通过X射线衍射仪(XRD)、光学显微镜(OM)、扫描电子显微镜(SEM)、能谱仪(EDS)和共聚焦显微镜等,分析研究了沉积层的相组成、表面形貌、组织结构、微区成分和界面特性。结果沉积层表面呈银灰色橘皮状,表面较致密、均匀,为典型的"火山坑"和"溅射状"花样形貌。涂层表面凸凹不平,表面粗糙度均方根偏差Rq约为3μm,沉积层厚度约为40μm,主要由非晶、ZrO_2、Cu_8Zr_3和ZL101基体Al(Si)相等组成,非晶以团块状或条状分布在晶体相之间。结论由于元素互扩散,非晶涂层与基材在界面处形成了3~4μm厚的过渡层,且呈良好的冶金结合。The work aims to improve the surface properties of aluminum alloy and extent the application of amorphous coating.A Zr55Al10Ni5Cu30 amorphous rod in the diameter of 2 mm was used as electrode to prepare amorphous alloy coatings on ZL101 alloy surface by electro-spark deposition technique,argon protection and double-deposition technology.The phase compositions,microstructures,surface morphology and interface characteristics of the deposited coatings were analyzed by X-ray diffraction(XRD),optical microscope(OM),scanning electron microscopy(SEM),energy dispersive spectrometer(EDS)and confocal microscope.From the results,the deposited coatings were dense and uniform with silver gray orange peel and the surface morphologies were typical“splash and sputter”and“crater”features.The root-mean-square deviation of unevenness and roughness on the coating was about 3μm and thickness was approximately 40μm.The Zr-based deposition coating was mainly composed of amorphous,ZrO2,Cu8Zr3 and ZL101 substrate phase Al(Si).The amorphous was distributed among crystal phases in form of block or strip.Electro-spark deposition technique is an amorphous coating preparation technology with extremely splendid potential due to high discharging frequency,small discharging area,concentrated energy and fast heating and cooling speed.A 3~4μm thick transition layer is formed owing to the diffusion of element at the interface of prepared amorphous coating and substrate to guarantee the metallurgical bonding.

关 键 词：电火花沉积 非晶沉积层 ZL101 组织 界面特征 

分 类 号：TG174.4[金属学及工艺—金属表面处理]