节点文献

Al-TiO₂-B系XD合成铝基复合材料的力学性能

Mechanical Properties of Composites Fabricated by XD Method in Al-TiO₂-B System

推荐 CAJ下载
PDF下载
不支持迅雷等下载工具，请取消加速工具后下载。

【Author】 ZHU He-guo1, WANG Hen-zhi1, SUN Qiang-jin1, WU Shen-qing2 (1. Dept.of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094; 2. Dept. of Materials Science and Engineering,South East University, Nanjing 210096, China)

【机构】南京理工大学材料科学与工程系；东南大学材料科学与工程系江苏南京210094；江苏南京210094；江苏南京210096；

【摘要】本文主要讨论了Al TiO2 B系XD合成铝基复合材料的力学性能及其增强机理。研究结果表明 :当B TiO2 摩尔比从 0增加到 2时 ,棒状物Al3Ti增强相逐渐减少直至消失 ,Al2 O3颗粒分布的均匀性提高 ,TiB2 粒状弥散分布在合金基体中 ,材料的抗拉强度明显增强 ,由 2 2 4 .5MPa上升到 35 4 .5MPa,延伸率也由 3.2 %增加到 5 .6 %。Al2 O3和TiB2主要以奥罗万机制强化基体 ,而Al3Ti则以位错塞积强化基体。更多还原

【Abstract】 The mechanical properties and strengthing mechanism of the composites fabricated by XD（Exothermic Dispersion） method in Al-TiO₂-B system were studied. It has been found that the amount of Al₃Ti phase decreased and finally disappeared, and that the ultimate strength and elongation rate of the composites increased from 224.5MPa to 354.5MPa and from 3.2% to 5.6% respectively with growth of mole rates of B/TiO₂ from 0 to 2. At same time, the distribution of the particulates Al₂O₃ in matrix was also improved. The strengthening mechanism of the particulates TiB₂ and Al₂O₃ was inorowan mode but the Al₃Ti was in dislocation plug.更多还原