摘要
以TC4钛合金球形粉和石墨烯纳米片为原料,通过低温高能球磨使石墨烯均匀分散于钛合金粉末基体上,采用热等静压工艺使复合材料烧结致密.研究了热等静压温度对复合材料显微组织、力学性能和热导率的影响.结果表明:随着热等静压温度的升高,材料的拉伸强度降低,而塑性提高,900℃热等静压时热导率取得最大值;与未添加石墨烯的纯钛合金相比,复合材料强度和热导率提高而塑性大幅度下降.
In the paper,graphene reinforced titanium matrix composites(TMCs)were prepared by HIP(hot isostatic pressing)method with powder mixture of spherical Ti6Al4V and graphene nanoflakes.The powder mixture was made by high energy and low temperature ball milling.The microstructure,mechanical property and thermal conductivity of TMCs had been investigated by SEM,static tensile tests and thermal conductivity tests.The results show that the HIP temperature has great influence on the microstructure and properties.With the increase of the HIP temperature,the strength of the composites gradually drops off,while the plasticity raises up.At 9000C,thermal conductivity of composites obtains maximum value.Compared to pure titanium alloy without added graphene,the strength and thermal conductivity of TMCs increase,while the plasticity decreases sharply.
作者
刘文彬
伍玩秋
裴新军
曾宏
陈伟
王铁军
LIU Wenbin;WU Wanqiu;PEI Xinjun;ZENG Hong;CHEN Wei;WANG Tiejun(Department of Electric Engineering,Yangjiang Polytechnic,Yangjiang 529566,China;Advanced Technology&Materials Co.,Ltd.(AT&M),Beijing 100081,China)
出处
《材料研究与应用》
CAS
2020年第4期267-273,共7页
Materials Research and Application
关键词
钛合金
石墨烯
热等静压
力学性能
热导率
titanium matrix composite
graphene
hot isostatic pressing
thermal conductivity
mechanical property
