Reactive hot pressing and mechanical properties of TiAl3/Ti3AlC2/Al2O3 in situ composite
Reactive hot pressing and mechanical properties of TiAl3/Ti3AlC2/Al2O3 in situ composite
复制标题
TiAl3/Ti3AlC2/Al2O3原位复合材料的反应热压及力学性能
DOI：
10.1016/j.matdes.2013.02.053
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发表时间：
2013-08
影响因子：
8.4
通讯作者：
Zhu, Dezhi
中科院分区：
文献类型：
--
作者：
Xiao, Huaqiang;Fu, Zhiqiang;Fang, Sicong;Zhu, Dezhi
以Al、tio2和TiC粉末混合物为原料，在1250℃、50MPa、10min条件下，采用原位反应/热压法制备了致密TiAl3/Ti3AlC2/ al2o3复合材料。研究了复合材料的反应动力学、微观结构、力学性能和增韧机理。发现TiO是过渡相，并提出了Al/TiO2/TiC体系的反应路径。该复合材料的维氏硬度、三点抗弯强度和断裂韧性分别为~ 8.4GPa、~ 658.9MPa和~ 7.9MPa/m1/2。显微组织/裂纹扩展路径相互作用分析表明，裂纹偏转、裂纹桥接和ti3alc2颗粒的拉出是ti3alc2增韧的主要机制。原位复合材料的抗压强度远高于铸态tial3，即使在1000℃下也能保持抗压强度。这主要是ti3alc2和Al2O3的协同强化所致。
Dense TiAl3/Ti3AlC2/Al2O3composite was synthesized from Al, TiO2and TiC powder mixture at 1250°C and 50MPa for 10min using an in situ reaction/hot-pressing method. The reaction kinetic, microstructure, mechanical properties and toughening mechanism of the fabricated composite were investigated. TiO was found to be the transitional phase, and the reaction path for the Al/TiO2/TiC system was proposed. The composite achieved Vickers Hardness, three-point bending strength and fracture toughness of ∼8.4GPa, ∼658.9MPa and ∼7.9MPa/m1/2, respectively. Analysis of microstructure/crack propagation paths interaction revealed that crack deflection, crack bridging, and pull-out of the Ti3AlC2particles were the main mechanism responsible for the toughening. The compressive strength of the in situ composite was much higher than that of as-cast TiAl3and could be maintained even at 1000°C. This was mainly attributed to the cooperative strengthening introduced by Ti3AlC2and Al2O3.
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影响因子：
8.4
作者：
Shouren Wang;P. Guo;Liying Yang;Fang Zhao;Yanjun Wang
通讯作者：
Shouren Wang;P. Guo;Liying Yang;Fang Zhao;Yanjun Wang
影响因子：
4.4
作者：
Toshio Matsubara;T. Shibutani;K. Uenishi;K. Kobayashi
通讯作者：
Toshio Matsubara;T. Shibutani;K. Uenishi;K. Kobayashi
单质粉末机械活化烧结Ti3AlC2的合成及微观结构
影响因子：
5.2
作者：
Zhang, Zhi-Li;Zhou, Yang;Li, Shi-Bo;Bei, Guo-Ping;Zhai, Hong-Xiang
通讯作者：
Zhai, Hong-Xiang
DOI：
10.1016/s1359-835x(99)00041-x
发表时间：
2000-01-01
影响因子：
8.7
作者：
Feng, CF;Froyen, L
通讯作者：
Froyen, L
影响因子：
6
作者：
Peng, LM;Wang, JH;He, LH
通讯作者：
He, LH