CAJ | 학술논문

选择不同粒径的6061Al粉末和SiC颗粒,采用真空热压法制备含35%SiC体积分数的SiCp/6061Al复合材料,研究不同级配比对复合材料显微组织和抗拉强度的影响.结果表明:复合粉末的粒径级配比可影响复合材料的微观组织和力学性能;当增强体颗粒粒径为15μm时,随基体6061粉末与SiC颗粒粒径比降低,SiC颗粒在复合材料中的分布越来越均匀,抗拉强度提高;当基体6061Al粒径为10 μm时,随SiC颗粒粒径减小,复合材料微观组织的均匀性降低,但抗拉强度提高.并建立了理想的复合粉末颗粒分布模型,模型的理论计算结果与Slipenyuk公式计算结果接近.
선택불동립경적6061Al분말화SiC과립,채용진공열압법제비함35%SiC체적분수적SiCp/6061Al복합재료,연구불동급배비대복합재료현미조직화항랍강도적영향.결과표명:복합분말적립경급배비가영향복합재료적미관조직화역학성능;당증강체과립립경위15μm시,수기체6061분말여SiC과립립경비강저,SiC과립재복합재료중적분포월래월균균,항랍강도제고;당기체6061Al립경위10 μm시,수SiC과립립경감소,복합재료미관조직적균균성강저,단항랍강도제고.병건립료이상적복합분말과립분포모형,모형적이론계산결과여Slipenyuk공식계산결과접근.
The 35%SiCp/6061Al composites were fabricated by powder metallurgy (PM). SiC particle with the sizes of 40, 25, 15 and 7.5 μm, and Al powder with the particle sizes of 60, 30 and 10 μm were used. The effect of ratio between reinforcement particle and matrix sizes on microstructure and mechanical properties of the composite was investigated. The tensile strength for different size match was studied, and microstructure was also observed by SEM. The results demonstrate that SiC particle distributes more uniformly and tensile strength increases with decreasing the size ratio of 6061Al powder to SiC particle when SiC size is 15μm; and SiC particle distributes more nonuniformly but the tensile strength increases with decreasing the size ratio of 6061Al powder to SiC particle when 6061Al size is 10μm. Size match of composite powders has great influence on the distribution of SiC particulates in the composites, and therefore on the mechanical properties. The ideal distribution model of composite powders is built and the modeling is similar with Slipenyuk's equation.