固溶时效对Al6092/SiC_(p)/β-LiAlSiO_(4)复合材料力学性能和微观形貌的影响  

Effects of Solution Aging on Mechanical Properties and Microstructure of Al6092/SiC_(p)/β-LiAlSiO_(4) Composites

作　　者：张诗浩 蒋海云[1] 符智翔 侯清麟[1] ZHANG Shihao;JIANG Haiyun;FU Zhixiang;HOU Qinglin(College of Packaging and Materials Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学包装与材料工程学院,湖南株洲412007

出　　处：《包装学报》2022年第5期22-27,共6页Packaging Journal

基　　金：国家自然科学基金资助项目(21978076);湖南省科技创新团队项目(2021RC4065);湖南省重点研发计划基金资助项目(2022GK2037);国家大学生创新创业培训计划项目(202111535001S)。

摘　　要：以6092铝合金(Al6092)为金属基体,碳化硅(SiC_(p))和β-锂霞石(β-LiAlSiO_(4))作为陶瓷颗粒增强相,采用粉末锻造工艺制备Al6092/SiC_(p)/β-LiAlSiO_(4)复合材料。探究固溶时效处理对Al6092/SiC_(p)/β-LiAlSiO_(4)复合材料力学性能的影响,揭示固溶时效处理对复合材料微观结构、析出相和位错的强化机制。结果表明,固溶时效处理能提高Al6092/SiC_(p)/β-LiAlSiO_(4)复合材料的刚度和强度,还能促进试样中高位错密度区和Mg_(2)Si析出相的产生,提高复合材料塑性变形所需的应力。此外,微米级SiC_(p)的高模量特性可以自发地承载载荷,β-LiAlSiO_(4)的引入则促进了增强相的分散。总之,固溶时效处理和二元陶瓷颗粒增强相可以共同提高Al6092的抗变形能力。Al6092/SiC_(p)/β-LiAlSiO_(4) composites were prepared by a powder forging process using Al6092 as the metal matrix and SiC_(p) andβ-LiAlSiO_(4) as the ceramic particle reinforcement phases.The effects of solution aging on the mechanical properties,the microstructure,precipitation phases,and dislocations of the composites were revealed.The results showed that the solution aging treatment improved the stiffness and strength of Al6092/SiC_(p)/β-LiAlSiO_(4) composites,and the solution aging promoted the generation of high dislocation density zones and Mg_(2)Si precipitation phases in the samples,which increased the stress required for plastic deformation of the composites.In addition,the high modulus property of micron-sized SiC_(p) could spontaneously carry loads,and the introduction ofβ-LiAlSiO_(4) promoted the dispersion of the reinforcing phase.In conclusion,the solution aging treatment and the particle-reinforced phase can jointly improve the deformation resistance of Al6092.

关 键 词：固溶时效 陶瓷颗粒 铝基复合材料 微观结构 析出相 

分 类 号：TG156.1[金属学及工艺—热处理]