Effect of B4C size on the fabrication and compression properties of in situ TiB2-Ti2AlC/TiAl composites
Effect of B4C size on the fabrication and compression properties of in situ TiB2-Ti2AlC/TiAl composites
复制标题
B4C尺寸对原位TiB2-Ti2AlC/TiAl复合材料制备和压缩性能的影响
DOI：
10.1016/j.jallcom.2012.09.123
复制
发表时间：
2013-02-25
影响因子：
6.2
通讯作者：
Jiang, Qichuan
中科院分区：
文献类型：
--
作者：
Shu, Shili;Qiu, Feng;Jiang, Qichuan
加入粗B_4C颗粒（40 μ m和20 μ m）后，Ti-Al-B_4C系的燃烧合成反应不完全。复合材料中存在较大的B4 C颗粒，导致压缩强度和塑性降低。当B_4C颗粒尺寸减小到3.5 μ m时，首次成功地制备了纯TiB_2-Ti_2Al_C/TiAl复合材料。原位合成的TiB 2和Ti 2AlC微粒（500-700 nm）可以在不牺牲塑性的情况下提高TiAl合金的抗压强度。添加3.5 μ mB 4C颗粒制备的TiB 2-Ti 2AlC/TiAl复合材料的平均屈服强度、极限压缩强度和断裂应变分别比纯TiAl合金提高259 MPa、174 MPa和0.3%。(C)2012年爱思唯尔B。V.保留所有权利。
With the addition of coarse B4C particles (40 mu m and 20 mu m), combustion synthesis reactions in Ti-Al-B4C systems are incomplete. Some large B4C particles exist in the composites, leading to lowering of the compression strength and ductility. When the size of the B4C particles is reduced to 3.5 mu m, pure TiB2-Ti2AlC/TiAl composite has been successfully fabricated for the first time. The in situ synthesized fine TiB2 and Ti2AlC particles (500-700 nm) could enhance the compression strength of the TiAl alloy without sacrificing ductility. The average yield strength, ultimate compression strength, and fracture strain of the pure TiB2-Ti2AlC/TiAl composite fabricated with the addition of 3.5 mu m B4C particles are, respectively, 259 MPa, 174 MPa and 0.3% higher than those of pure TiAl alloy. (C) 2012 Elsevier B. V. All rights reserved.