微波辅助燃烧合成FeCoNiCuAl高熵合金的组织与性能  

Microstructure and mechanical properties of FeCoNiCuAl high-entropy alloy prepared by microwave-assisted combustion synthesis

作　　者：王腾[1] 孔见[1] 巢昺轩[1] 

机构地区：[1]南京理工大学材料科学与工程学院,南京210094

出　　处：《粉末冶金技术》2011年第6期435-438,442,共5页Powder Metallurgy Technology

摘　　要：基于高熵合金的成分设计理念,利用铝热反应机制,以氧化物粉末为原料,采用微波辅助燃烧合成法,制备了块体FeCoNiCuAl高熵合金,试验了一种高熵合金制备的新方法。研究了该合金的微观结构和性能,结果表明:该合金的组织是典型的树枝晶;该合金具有简单的体心立方和面心立方结构;Fe、Co、Ni、Al四种元素分布比较均匀,Cu倾向于偏聚在枝晶间;该合金显示出良好的室温压缩性能,其压缩屈服强度、压缩断裂强度和极限塑性应变量分别达到了1 116MPa、1 312MPa和11.4%;其显微硬度为517HV。A FeCoNiCuAl high-entropy alloy was prepared by a novel method of microwave-assisted combustion synthesis,taking the oxides as raw materials and composition design of high entropy alloy and aluminum thermal reaction mechanism.The microstructure and room-temperature mechanical properties were investigated.The results show that the alloy forms dendritic structures and has simple FCC＋BCC solid solution structure.Fe,Co,Ni,Al are evenly distributed in the alloy while Cu tends to segregate in the interdendritic structure.The yield stress,compressive strength and plastic strain of the alloy reach 1 116MPa,1 312MPa,and 11.4%,respectively.Besides,the microhardness value is 517HV.

关 键 词：高熵合金 组织结构 性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]