TiC_p/ZA43复合材料的热膨胀行为研究  

Study of Thermal Expansion Behavior of TiC Particulate Reinforced ZA43 Matrix Composite

作　　者：谢贤清[1] 张荻[1] 蔡建国[2] 刘金水[2] 

机构地区：[1]上海交通大学金属基复合材料国家重点实验室,上海200030 [2]湖南大学机械与汽车工程学院,长沙410082

出　　处：《材料工程》2001年第8期3-6,共4页Journal of Materials Engineering

基　　金：机械工业部资助项目 (9686)

摘　　要：采用 XDTM法与搅拌铸造法相结合的工艺制备了 Ti Cp/ ZA43复合材料 ,研究了 Ti Cp/ ZA43复合材料的微观组织 ,测定了 Ti Cp/ ZA43复合材料 5 0～ 2 5 0℃间的热膨胀系数值 ,并运用理论模型对该温度区间的热膨胀系数进行了计算 ,分析了热膨胀性能的影响因素。结果表明 ,Ti C颗粒增强相的加入使 ZA43合金的微观组织和热膨胀性能显著改善。运用 Kerner模型和 Turner模型对 Ti Cp/ ZA43复合材料的热膨胀系数的计算值与实测值能很好地吻合。研究发现 Ti Cp/ ZA43复合材料的界面热应力随温度的升高而显著地增加 ,但随 Ti C颗粒含量的增加只稍有增长。TiC p/ZA43 composite was fabricated by XD TM and stirring casting techniques The microstructure was investigated, and the coefficient of thermal expansion (CTE) of TiC p/ZA43 composite was measured in the range of 50～250℃ with a dilatometer Theoretical models were employed to calculate the CTE of TiC p/ZA43 in the same temperature range The influence factors on thermal expansion property were analyzed It is shown that TiC particles can improve microstructure and thermal expansion property of ZA43 alloy, and the CTE of the composites decreases with the increase of particle volume fraction The theoretically calculated CTEs are very close to the experimental values Interfacial thermal stress of TiC p/ZA43 increases rapidly with temperature and slightly with TiC particles content increasing The influence of thermal stress on CTEs depends on temperature range

关 键 词：热膨胀性能 TiCp/ZA43复合材料 理论模型 热应力 碳化钛陶瓷颗粒 ZA43合金 

分 类 号：TB332[一般工业技术—材料科学与工程]