SPS温度对NbC/Cu复合材料微观结构和性能的影响  

Effect of SPS Sintering Temperature on Microstructure and Properties of NbC/Cu Composites

作　　者：孙长飞 翟振杰 王喆[1] 李登辉 陈聪 雷前[2] SUN Changfei;ZHAI Zhenjie;WANG Zhe;LI Denghui;CHEN Cong;LEI Qian(College of Physics and Electronic Information Engineering,Qinghai Minzu University,Xining 810007,China;State Key Laboratory for Powder Metallurgy,Central South University,Changsha 410083,China)

机构地区：[1]青海民族大学化学与材料科学学院,青海西宁810007 [2]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《金属材料与冶金工程》2024年第6期3-8,共6页Metal Materials and Metallurgy Engineering

基　　金：青海省科学技术厅自然科学基金(2021-ZJ-706)。

摘　　要：采用火花等离子烧结(SPS)工艺制备了NbC/Cu复合材料,研究了SPS温度对ω(NbC)=5%的Cu复合材料微观结构和性能的影响。复合材料的扫描电镜和元素分布图分析表明,NbC颗粒弥散且均匀地分布在铜基体中。随着SPS温度的升高,NbC/Cu复合材料的相对密度逐渐增大,电导率先增大后减小,维氏硬度和抗压屈服强度逐渐减小。当SPS温度为850℃时,ω(NbC)=5%的Cu复合材料抗压屈服强度、抗压应变、硬度和电导率分别为270 MPa、40.43%、121.8 HV和9.09 MS/m,复合材料性能得到明显改善,这主要是基于弥散强化机制和细晶强化机制的协同效应。In this study,NbC/Cu composites were prepared using the Spark Plasma Sintering(SPS)process,and the influence of SPS temperature on the microstructure and properties of the 5wt%NbC/Cu composites was investigated.Scanning Electron Microscope(SEM)and elemental distribution maps of the composites indicated that NbC particles were dispersed uniformly within the Cu matrix.As the SPS temperature increased,the relative density of the NbC/Cu composites gradually rose,while the electrical conductivity initially increased and then decreased.The Vickers hardness and compressive yield strength gradually decreased with rising temperature.At an SPS temperature of 850℃,the 5wt%NbC/Cu composites exhibited a compressive yield strength of 270 MPa,a compressive strain of 40.43%,a hardness of 121.8 HV,and an electrical conductivity of 9.09 MS/m.The properties of the composites were significantly improved,primarily due to the synergistic effect of the dispersion strengthening mechanism and the fine-grain strengthening mechanism.

关 键 词：铜基复合材料 硬质合金颗粒 高能球磨 SPS 

分 类 号：TU512.1[建筑科学—建筑技术科学]