首页|放电等离子体烧结Cu/Invar双金属基复合材料的工艺优化、显微结构与力学/热性能

放电等离子体烧结Cu/Invar双金属基复合材料的工艺优化、显微结构与力学/热性能

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采用放电等离子体烧结(SPS)工艺制备(30～50)％Cu/Invar(质量分数)双金属基复合材料.通过设计正交实验方案,系统研究Cu含量、压制压力及烧结温度对复合材料显微结构、力学性能和热性能的影响.结果表明,随着Cu含量由30％增加至50％(质量分数),Cu基体逐渐转变为连续网络分布,复合材料致密度、热导率及热膨胀系数增大,但抗拉强度降低.提高烧结温度,Cu/Invar界面扩散加剧,导致复合材料的热导率降低,抗拉强度增大.压力对复合材料热性能的影响较为复杂.在700℃,60 MPa下制备的50％Cu/Invar(质量分数)复合材料具有最高的热导率,为90.7 W/(m·K),优于以往报道的大多数Cu/Invar复合材料.
Process optimization, microstructures and mechanical/thermal properties of Cu/Invar bi-metal matrix composites fabricated by spark plasma sintering
An orthogonal experiment scheme was designed to investigate the effects of the Cu content, compaction pressure, and sintering temperature on the microstructures and mechanical and thermal properties of (30-50)wt.％Cu/ Invar bi-metal matrix composites fabricated via spark plasma sintering (SPS). The results indicated that as the Cu content increased from 30 to 50 wt.％, a continuous Cu network gradually appeared, and the density, thermal conductivity (TC) and coefficient of thermal expansion of the composites noticeably increased, but the tensile strength decreased. The increase in the sintering temperature promoted the Cu/Invar interface diffusion, leading to a reduction in the TC but an enhancement in the tensile strength of the composites. The compaction pressure comprehensively affected the thermal properties of the composites. The 50wt.％Cu/Invar composite sintered at 700 ℃ and 60 MPa had the highest TC (90.7 W/(m·K)), which was significantly higher than the TCs obtained for most of the previously reported Cu/Invar composites.

spark plasma sintering (SPS)Cu/Invar bi-metal compositemicrostructureinterface diffusionmechanical propertythermal property

聂强强、陈国宏、汪冰、杨磊、汤文明

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合肥工业大学材料科学与工程学院,合肥 230009

国网安徽省电力有限公司电力科学研究院,合肥 230601

中国电子科技集团公司第43研究所,合肥 230088

微系统安徽省重点实验室,合肥 230088

合肥圣达电子科技实业有限公司,合肥 230088

高性能铜合金材料及成形加工教育部工程研究中心,合肥 230009

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放电等离子体烧结(SPS) Cu/Invar双金属基复合材料 显微结构 界面扩散 力学性能 热性能

authors are grateful for the financial support from the International Science&Technology Cooperation Program of China

2014DFA50860

2021

10.1016/S1003-6326(21)65714-X

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(10)
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