化学镀镍(SCF-Ni)短炭纤维增强铝基复合材料的显微组织与力学性能  

Microstructure and mechanical property of aluminum matrix composite strengthened by short carbon fiber with Ni-coating(SCF-Ni)

作　　者：蒋文婷 李国栋[1] 杨娟[1] 刘阳[1] 于士杰 JIANG Wenting;LI Guodong;YANG Juan;LIU Yang;YU Shijie(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)

机构地区：[1]中南大学粉末冶金研究院国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2020年第2期148-156,共9页Materials Science and Engineering of Powder Metallurgy

基　　金：GFKL创新特区项目(17-163-**-ZF***-15-01)。

摘　　要：利用化学镀技术在短炭纤维(short carbon fiber, SCF)表面镀镍,制备镍层包覆的炭纤维(SCF-Ni)。采用湿混法将不同含量的镀镍短炭纤维(SCF-Ni)与铝硅合金粉(Al-Si)均匀混合,用放电等离子烧结技术(SPS)制备镀镍炭纤维增强铝基复合材料(SCF-Ni/Al-Si复合材料)。通过SEM观察炭纤维和复合材料的组织与形貌;用XRD分析复合材料界面物相,探究SCF-Ni质量分数对复合材料微观结构及力学性能的影响。结果表明,随SCF-Ni含量增加,SCF-Ni/Al-Si复合材料密度下降,硬度增加,室温抗拉强度先升高后降低,在SCF-Ni质量分数为9%时达到最大值152 MPa,较Al-Si基体的抗拉强度(90 MPa)提升了68%。The short carbon fiber that completely coated with nickel layer by electroless was prepared.The nickel-plated short carbon fibers(SCF-Ni)and the aluminum silicon alloy powder(Al-Si)were uniformly mixed by wet mixing method.The aluminum matrix composites strengthened by SCF-Ni were prepared by the plasma sintering technique(SPS).The surface of the carbon fibers and the morphology of the composites were observed by SEM and the interface of the composites was analyzed by XRD.The effects of the content of SCF-Ni on the microstructure and mechanical properties of the composites were investigated.The experimental results show that with the increase of the mass fraction of SCF-Ni,the density of the composites decreases,the hardness increases,and the room temperature tensile strength increases first and then decreases.When the mass fraction of SCF-Ni reaches 9%,the tensile strength reaches a maximum value(152 MPa),which is 68%higher than the tensile strength(90 MPa)of the substrate.

关 键 词：化学镀镍 短炭纤维 铝基复合材料 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]