Fe基非晶纳米晶电弧喷涂层的摩擦学性能  

Tribology Properties of Fe-based Amorphous and Nanocrystalline Coatings Prepared by Automatic Arc Spraying Process

作　　者：王林磊[1] 梁秀兵[1,2] 陈永雄[1] 郭伟[1] 丁华东[1] 

机构地区：[1]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072 [2]装甲兵工程学院科研部,北京100072

出　　处：《摩擦学学报》2011年第6期610-615,共6页Tribology

基　　金：国家自然科学基金项目(50735006;50905185)资助~~

摘　　要：采用自动化高速电弧喷涂技术在AZ91镁合金基体上制备了FeCrBSiMnNbW非晶纳米晶涂层.研究了涂层材料在干摩擦条件下的摩擦学性能.采用配备有能谱分析仪(EDAX)的扫描电子显微镜(SEM)和X射线衍射仪(XRD)对涂层的微观组织结构进行了表征.采用显微硬度计和纳米压痕仪对涂层的力学性能进行了分析,摩擦磨损试验在UMT-2型摩擦磨损试验机上进行,并采用三维白光干涉表面形貌仪(Phase Shift MicroWAM-3D)测定磨损量.结果表明:涂层组织均匀、结构致密、氧化物含量低,涂层主要由非晶相和纳米晶相组成;涂层具有较高的硬度和弹性模量;在相同的试验条件下,非晶纳米晶合金涂层的相对耐磨性是传统3Cr13涂层的3倍;磨损机制主要为典型的脆性剥落.Automatic high velocity arc spraying process was used to deposit the FeCrBSiMnNbW amorphous and nanocrystalline coating on an AZ91 magnesium alloy substrate.The tribological properties of the coating under dry sliding were investigated on a UMT-2 micro tribo-tester.The microstructure of the coating was characterized by using scanning electron microscopy（SEM） equipped with energy dispersive X-ray analysis（EDAX） and X-ray diffraction（XRD）.Mechanical properties were measured on Vickers hardness tester and nanoindenter.The results show that the coating mainly consisted of amorphous phase and α-Fe（Cr） nanocrystals.The coating had low porosity,low amount of oxide,high microhardness and high elastic modulus.The relatively wear resistance of the amorphous and nanocrystalline coating is 3 times as that of the conventional 3Cr13 coating.The main wear mechanism of the coating was typical brittle spalling failure mechanism.

关 键 词：高速电弧喷涂 铁基非晶纳米晶涂层 摩擦磨损性能 

分 类 号：TG174.442[金属学及工艺—金属表面处理]