Ts复合材料组织性能的影响.doc

Ts复合材料组织性能的影响
摘要: 放电等离子烧结(SPS)工艺可以实现快速烧结成型,且制备出的复合材料致密度高、硬度高、导电和导热性能好、(CVD)Ts复合粉末的基础上,、偏光显微镜、数字金属导电率测试仪、微拉伸试验机、,当烧结温度为750 ℃,烧结压力为45 MPa,烧结时间为10 min,升温速率为80 ℃/min时,Ts复合材料的组织和性能较佳,导电率、%IACS、(HV)、178 MPa.
关键词:
Ts复合材料; 放电等离子烧?Y; 导电率; 组织性能
中图分类号: TG 文献标志码: A
SPS Impacts on Microstructures and Properties of
posite Materials
FU Shaoli, LIU Ping, CHEN Xiaohong, LIU Xinkuan
(School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)
Abstract:
Spark plasma sintering(SPS) process has the advantage of rapid sintering molding,high density,high hardness,good electrical conductivity,excellent thermal conductivity and uniform grain size posite manuscript reports that different SPS processes were used to prepare posite materials from well-distributed posite powder which is synthesized in-situ by chemical vapor deposition its microstructure and performance were characterized by using SEM,polarizing microscope,digital metallic conductivity tester,micro tensile testing machine and microhardness is found that the best microstructure and property were achieved when the sintering temperature is 750 ℃,sintering time is 10 min,sintering pressure is 45 MPa and heating rate is 80 ℃/,the electrical conductivity,hardness and tensile strength are %IACS,(HV)and 170 MPa,respectively.
Keywords:
posite materials; spark plasma sintering; electrical conductivity; microstructure and property
自1991年碳纳米管(carbon Ts)[1]被发现以来,,且制备工艺对复合材料组织性能的影响很大[2],与传统的制备复合材料的工艺相比,放电等离子烧结(spark plasma sintering,SPS)工艺可以实现在相对较低的温度下使材料快速烧结成型,且材料的致密度较高,因而采用SPS工艺制备的复合材料具有致密度高、硬度高、导电和导热性能良好、晶粒尺寸均匀等优点[3],Ts增强Cu基复合材料的常用工艺.
SPS工艺的制备流程是把粉末放入石墨等材质的模具内,通过上、下压头及产生的电流的作用,把烧结压力和温度施加到待烧结的粉末上,经过一系列烧结流程,:材料内部颗粒的密集期、颈部的形成期、颈部组织的成长期、材料