Microstructures and Dry Sliding Wear Properties of ZrB_2/A356 Composites Synthesized by Magneto-chemistry in situ Reaction  

作　　者：陈登斌 赵玉涛 ZHU Haiyan CHEN Gang 

机构地区：[1]School of Materials Science and Engineering, Jiangsu University [2]Silicon Lake College

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第2期384-388,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.50971066);the Jiangsu Provincial'333'Project of training the Highlevel Talents Foundation(No.2008-46);the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)

摘　　要：In situ A356-x%PVF （particle volume fraction） ZrB2 （ x=1, 3, 5） composites were prepared via magneto-chemistry in situ reaction and the dry sliding wear properties of the composites were investigated. The experimental results show that ZrB2 reinforcement particle is obtained and its morphology mainly present in spherical and regular hexagon. Wear test results show that the values of wear weight loss of the composites decrease with the increase of value under a given sliding time and a certain load of 60 N. Especially, when x=5, the weight loss of the as-prepared composite is 43.1 mg, which is only 36.4% to that ofA356 alloy, 118 rag. The wear mechanism is changed from adhesion wear to adhesion wear and abrasive wear and then to abrasive wear with the increase of x value.In situ A356-x%PVF （particle volume fraction） ZrB2 （ x=1, 3, 5） composites were prepared via magneto-chemistry in situ reaction and the dry sliding wear properties of the composites were investigated. The experimental results show that ZrB2 reinforcement particle is obtained and its morphology mainly present in spherical and regular hexagon. Wear test results show that the values of wear weight loss of the composites decrease with the increase of value under a given sliding time and a certain load of 60 N. Especially, when x=5, the weight loss of the as-prepared composite is 43.1 mg, which is only 36.4% to that ofA356 alloy, 118 rag. The wear mechanism is changed from adhesion wear to adhesion wear and abrasive wear and then to abrasive wear with the increase of x value.

关 键 词：magneto-chemistry ZrB2/A356 composite microstructure wear properties 

分 类 号：TB33[一般工业技术—材料科学与工程] TG174.442[金属学及工艺—金属表面处理]