混料工艺对稀土添加SiC_(p)/Al基复合材料组织性能的影响  

Effect of mixing processes on microstructure and mechanical properties of SiC_(p)/Al composites with rare earth

作　　者：谢文芳 柳培[2,3] XIE Wenfang;LIU Pei(Luoyang Institute of Electro-Optic Equipment,AVIC,Luoyang 471000,China;College of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Collaborative Innovation Center ofNonferrous Metals of Henan Province,Luoyang 471023,China)

机构地区：[1]中国航空工业集团公司洛阳电光设备研究所,河南洛阳471000 [2]河南科技大学材料科学与工程学院,河南洛阳471023 [3]有色金属新材料及先进加工技术省部共建协同创新中心,河南洛阳471023

出　　处：《粉末冶金工业》2021年第1期51-55,共5页Powder Metallurgy Industry

基　　金：国家自然科学基金资助项目(51771070,U1604251);河南省教育厅科学技术研究重点项目(14A430002)。

摘　　要：以SiC粉末、Al-Si合金粉末及CeO2粉末为原料,采用3种混料方式(机械混合法、球磨干混、球磨湿混)、在球磨干混条件下采用不同混料时间进行混料,并采用粉末冶金法制备了稀土添加SiC_(p)/Al基复合材料,对复合材料进行SEM表征及力学性能测试,研究了混料工艺对稀土添加SiC_(p)/Al基复合材料组织性能的影响。结果表明:球磨干混能够同时细化SiC和Si相颗粒,对提升复合材料力学性能有利。球磨湿混因介质酒精对磨球的阻碍作用,对SiC和Si相颗粒细化效果最差,不利于提升复合材料力学性能。机械混合法则介于二者之间。球磨干混条件下,球磨时间延长有利于SiC颗粒的破碎细化,从而对提升复合材料力学性能有利。但球磨时间超过6 h,SiC细化效果不大,复合材料的性能提升效果不明显。SiC powder,Al-Si alloy powder and CeO2 powder were mixed using three mixing methods(mechanical mixing,dry ball-milling and wet ball-milling)and with different mixing time under the condition of dry ballmilling,the SiC_(p)/Al composites with rare earth were fabricated by powder metallurgy.The samples were tested by SEM,tensile and hardness measurement to study the effects of different mixing method on microstructure and mechanical properties of SiC_(p)/Al composites.The results show that SiC and Si particles in the composite can be simultaneously refined by dry ball-milling,and thus the composite shows the best mechanical properties.The wet ballmilling has the worst refining effect on SiC and Si particles due to the medium alcohol`s obstruction on the ball,and thus the composites have the worst mechanical properties.The refining effect on SiC and Si particles of mechanical mixing and the performance of composites are just between the above two mixing methods.Under the condition of dry ball-milling,the increase of ball-milling time is beneficial to the fragmentation and refinement of SiC particles,but when the mixing time exceeds 6 h,the refining effect of SiC is not significant and the performance can not improve obviously.

关 键 词：混料方式 混料时间 铝基复合材料 微观组织 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]