【摘要】 用熔炼法原位合成了TiB-Nd2O3-Ti复合材料。采用金相显微镜、扫描电镜、透射电镜等对其组织及性能进行了观察和分析。结果显示,原位合成的复合材料中,增强体为TiB与Nd2O3,它们均匀分布在Ti基体中,与基体之间没有发生显著的界面反应。原位合成复合材料的压缩屈服强度及其在500℃和600℃时的高温拉伸强度与基体Ti相比均有大幅度提高,其断裂机理与组织结构及变形温度有关。更多还原

【Abstract】 In situ TiB-Nd2O3-Ti composites were synthesized by ingot metallurgy.With optical microscope,scanning electronic microscope and transonic electron microscope,the microstructure,mechanical properties and failure mechanism of the in situ composites were investigated.It is showed that the reinforcements of composites are TiB and Nd2O3which are distributed uni-formly in the composite.The interfaces between reinforcements of TiB,Nd2O3and Ti matrix are clear without any interfacial reaction.The compress strength at room temperature and the tensile strength at elevated temperature of the TiB-Nd2O3-Ti composite have improved greatly.The fracture mechanism of the composite is affected by the microstructure of composites and testing temperature.更多还原