烧结温度对SiC增强铝基复合材料组织和性能的影响  

Effect of Sintering Temperatures on the Microstructure and Properties of SiC Reinforced Aluminum Matrix Composites

作　　者：张波[1] 但文德 吴广新[2] 

机构地区：[1]贵阳产业技术研究院贵阳产业技术研究院有限公司贵阳职业技术学院,贵州贵阳550081 [2]省部共建高品质特殊钢冶金与制备国家重点实验室上海市钢铁冶金新技术开发应用重点实验室和上海大学材料科学与工程学院,上海200072

出　　处：《上海金属》2016年第6期32-37,48,共7页Shanghai Metals

基　　金：贵阳国家高新技术产业开发区管理委员会科技型中小企业技术创新项目(No.GXCX2015-017)

摘　　要：SiC／ZL109复合材料中增强体SiC分别在不同的氧化温度（800、900、1000、1100℃）下高温氧化5h，并通过搅拌铸造法制备复合材料。结果表明，SiC氧化温度在800℃时，SiC颗粒氧化层基本形成；在800℃以上，SiC颗粒被氧化层全部覆盖。在800-1100℃，SiO2层厚度的变化范围在0．096-0．5425μm，其中在1000℃时，SiC增厚0．383μm。在1000℃氧化5h条件下，SiC／ZL109复合材料的界面存在MgAl2O4相，但无脆性相Al4C3存在，这有利于界面结合，且此条件下材料的密度最大，孔隙率和磨损率最小。SiC/ZL109 composites were prepared by SiC particles oxidation at different temperatures of 800,900, 1 000, 1 100 ℃ for 5 h with stirring casting technology. Results indicated that at the temperature of 800 ℃, the oxidation layer of SiC particles was basically formed ; and above 800 ℃, the SiC particles was completely covered with the oxide layer. At the temperatures between 800 ℃ and 1 100 ℃, the SiO2 layer thickness ranged from 0. 096 to 0. 542 5 μm, and at I 000 ℃, the SiC thickened to 0. 383 μm. When oxidation at 1 000 ℃ for 5 h, the new phase MgA12 04 was formed at the interfaces of SiC/ZL109, no harmful brittle phase Al4C3 existed, which was beneficial to the interface combination, and the density of the material was the highest, the porosity and wear rate were the least in this condition.

关 键 词：SiC/ZL109复合材料 烧结温度 搅拌铸造法 组织 性能 

分 类 号：TG161.8[金属学及工艺—热处理]