磁场下W-20Cu复合材料的干摩擦学性能  

Dry-sliding Tribological Characteristics of W-20Cu Composite Under of Magnetic Field

作　　者：王凤梅[1] 谢敬佩[1] 李炎[1] 王爱琴[1] 马窦琴[1] 刘舒[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023

出　　处：《中国表面工程》2014年第3期76-80,共5页China Surface Engineering

基　　金：国家自然科学基金(51371077)

摘　　要：采用水热合成法制得纳米W-Cu复合粉末,并在1 050℃经热压烧结制备出W-20Cu复合材料。利用扫描电子显微镜(SEM)分析了W-20Cu的组织形貌、磨损形貌及磨屑,并在室温下与7075铝合金配副进行磁场干摩擦磨损试验。结果表明:水热合成-热压烧结法制得的W-20Cu复合材料的硬度达215HB,电导率为45%IACS。不加磁场时,W-20Cu复合材料销磨损面黏附较厚的高含Al层,磨屑呈螺旋状,磨损机制主要为粘着磨损;随着磁场强度的增加,黏附层变薄,销的磨损程度略微减弱而环的磨损加剧,摩擦副的摩擦因数有减小趋势,磨屑逐渐呈细小的碎片状及粒状,磨损机制主要为粘着磨损和轻微的氧化磨损。W-20Cu compacts made from powders by hydrothermal synthesis method were prepared at 1 050℃by hot press sintering.Wear tests between W-20Cu compacts and 7075Al in the magnetic field were carried out at room temperature.The microstructure of compacts,wear morphologies and wear debris were analyzed by scanning electron microscopy（SEM）.Test results show that the hardness and conductivity of W-20Cu composite are 215HB and 45%IACS,respectively.Under non-magnetic field conditions,the worn surface of W-20Cu composite is adhered by thick Al layers,wear debris are spiral,and the main wear mechanism is adhesive wear.With increasing magnetic field intensity,the adhesion layer getting thinner,the magnetic field can slightly reduce the wear loss of W-20Cu compacts,however,aggravate the wear loss of 7075Al,and the friction coefficient of the friction pairs is reduced gradually.Wear debris are fragmented and get smaller gradually,and the main wear mechanism is adhesive wear and slightly oxidation wear.

关 键 词：W-20Cu复合材料 磁场 摩擦 磨损 

分 类 号：TG115.58[金属学及工艺—物理冶金] TB331[金属学及工艺—金属学]