Processing Condition and Mechanical Properties of Blended Elemental P/M Particulate-reinforced Ti3Al Intermetallics Matrix Composite
Processing Condition and Mechanical Properties of Blended Elemental P/M Particulate-reinforced Ti3Al Intermetallics Matrix Composite
复制标题
共混元素 P/M 颗粒增强 Ti3Al 金属间化合物基复合材料的加工条件和力学性能
DOI：
10.2497/jjspm.43.433
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Y. Kawabe
中科院分区：
文献类型：
--
作者：
S. Emura;M. Hagiwara;Y. Kawabe
为了改善Ti3Al金属间化合物的高温性能，采用混合元素(Be)粉末冶金方法制备了10wt%TiB陶瓷颗粒增强Ti-24Al-11Nb(at%)基复合材料。以纯钛粉、Nb-Al中间合金粉和TiB_2陶瓷粉为原料。在真空烧结过程中，TiB颗粒增强相在基体中原位弥散分布。使用较细的起始粉(45μm)，在较高温度(1823K)下烧结，可获得均匀分散的TiB颗粒。随着起始粉末尺寸的减小和烧结温度的升高，复合材料的密度也随之增加。高温拉伸和蠕变试验结果表明，Ti-24Al-11Nb/TiB复合材料的高温力学性能优于未增强的Ti-24Al-11Nb。
To improve the high temperature performance of Ti3Al intermetallics, 10wt% TiB ceramic particulate reinforced Ti-24Al-11Nb(at%) matrix composites have been produced by blended elemental (BE) powder metallurgy method. Pure titanium powder, Nb-Al master alloy powder and TiB2 ceramic powder were used as the starting materials. TiB particulate reinforcements were dispersed in-situ in the matrix during the vacuum sintering. By using finer starting powder (45μm) and sintering at higher temperature (1823K), homogeneous dispersion of TiB particulates was attained. The density of the composite was also increased with the decrement of the size of starting powders and the increment of the sintering temperature. The results of high temperature tensile and creep tests indicated that high temperature mechanical properties of Ti-24Al-11Nb/TiB composites were superior to those of the unreinforced Ti-24Al-11Nb.