Reaction behaviour, microstructure and mechanical properties of TiC–TiB2/Ni composite fabricated by pressure assisted self-propagating high-temperature synthesis in air and vacuum
Reaction behaviour, microstructure and mechanical properties of TiC–TiB2/Ni composite fabricated by pressure assisted self-propagating high-temperature synthesis in air and vacuum
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DOI：
10.1016/j.matdes.2013.02.036
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发表时间：
2013-08
影响因子：
8.4
通讯作者：
Y. F. Yang;Q. Jiang
中科院分区：
文献类型：
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作者：
Y. F. Yang;Q. Jiang
采用压力辅助自蔓延高温合成(SHS)在625℃下加入空气的简单方法成功制备了致密的TiC-TiB_2/Ni复合材料。空气中的着火温度远低于真空中的着火温度(1040℃)。空气中制备的复合材料与真空中制备的复合材料具有相似的相组成、微观结构和相似的力学性能。空气和真空中的着火温度与Ni含量和反应物颗粒大小密切相关，而反应产物只与Ni含量和B4C颗粒大小有关，而与Ti颗粒大小无关。在空气和真空中制备的复合材料的密度只与Ni含量有关，而在空气和真空中制备的复合材料的力学性能与Ni含量和反应物颗粒尺寸的关系相似。
The dense TiC–TiB2/Ni composite was successfully fabricated via a simple route where the pressure assisted self-propagating high-temperature synthesis (SHS) was directly ignited at 625°C with the incorporation of air. The ignition temperature in air was much lower than that in vacuum (1040°C). The composites made in air possessed the similar phase constituents and microstructure as well as comparable mechanical properties to those made in vacuum. The ignition temperature both in air and vacuum showed a significant dependence on Ni content and reactant particle size while the reaction products only showed a dependence on Ni content and B4C particle size, irrespective of Ti particle size. The density of the composite made in air and vacuum only depended on Ni content while the mechanical properties of the composites made in air and vacuum both showed a similar dependence on the Ni content and reactant particle size.