Wear behavior and mechanism of B_4C reinforced Mg-matrix composites fabricated by metal-assisted pressureless infiltration technique  

金属诱发无压浸渗技术制备B_4C/Mg复合材料的磨损行为与机制（英文）

作　　者：姚彦桃 姜澜[2] 付高峰[2] 陈礼清[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,沈阳110819 [2]东北大学材料与冶金学院,沈阳110819

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第8期2543-2548,共6页中国有色金属学报（英文版）

基　　金：Project(51271051)supported by the National Natural Sciecne Foundation of China

摘　　要：The B4C/Mg composites fabricated by metal-assisted pressureless infiltration technique were used as experimental material, and the wear behavior and mechanism of this material were studied. A pin-on-disc apparatus was used to evaluate the wear behavior where loads of 20, 40, 60 and 80 N, and a sliding velocity of 250 r/min were exerted. The results show that B4C/Mg composites possess superior wear resistance than pure Mg under various applied loads, and the content of Ti, as infiltration inducer, has an influence on the wear resistance of B4C/Mg composites. The dominant wear mechanism for pure Mg is abrasion, while that for B4C/Mg composites under low loads is adhesion and delamination. Under high loads, the wear mechanism of B4C/Mg composites can be attributed to thermal softening and melting or plastic deformation.利用金属诱发无压浸渗技术制备的B_4C/Mg复合材料为实验材料,研究该材料的磨损行为与磨损机制。在销盘式实验装置上对施加不同载荷(20、40、60和80N)以及磨损速率为250r/min实验条件下的磨损行为进行评价。结果表明:B_4C/Mg复合材料在所施加载荷下均比纯Mg基体表现出更优异的抗磨性能。作为诱发浸渗剂的金属Ti颗粒,其含量对B_4C/Mg复合材料的磨损性能具有一定影响。纯Mg基体的主要磨损机制是磨粒磨损;而对于B_4C/Mg复合材料,当施加载荷较低时,主要磨损机制为粘着和层离;当施加载荷较高时,其磨损机制为加热软化熔化或塑性变形。

关 键 词：B4C Mg-matrix composites B4C metal-assisted infiltration wear behavior wear mechanism 

分 类 号：TB33[一般工业技术—材料科学与工程]