Synthesis and Mechanical Properties of (Ti,V)2AlC/Al2O3 In Situ Solid Solution Composites by Reactive Hot Pressing

Synthesis and Mechanical Properties of (Ti,V)2AlC/Al2O3 In Situ Solid Solution Composites by Reactive Hot Pressing
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反应热压合成(Ti,V)2AlC/Al2O3原位固溶体复合材料及其力学性能

DOI:
10.1111/j.1551-2916.2012.05393.x
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发表时间:
2012-10
期刊:
J.Am.Ceram.Soc.
影响因子:
--
通讯作者:
Na Han
Na Han
中科院分区:
其他
文献类型:
--
作者:
Jianfeng Zhu;Na Han

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采用原位热压工艺,在Ti、Al和炭黑体系中引入Al和V2 O 5的铝热反应,成功地合成了(Ti,V)2AlC/Al 2 O3固溶体复合材料。研究了(Ti,V)2AlC/Al 2 O3固溶体复合材料在500°C ~ 1350°C温度范围内的相演变过程,并提出了一种可能的反应机理。当Al 2 O3含量为10wt%时,复合材料的硬度、弯曲强度和断裂韧性分别提高了53.2%、140%和180%。并对复合材料的强韧化机理进行了探讨。
Solid solution composites of (Ti,V)2AlC/Al2O3 were successfully synthesized using the in situ hot-pressing process by the incorporation of the thermit reaction of Al with V2O5 in Ti, Al, and carbon black system. The phase evolution during the formation of the composites was examined from 500°C to 1350°C, and a possible reaction mechanism was proposed to explain the formation of (Ti,V)2AlC/Al2O3 solid solution composites. The composite with 10 wt% Al2O3 possesses the best mechanical properties and the hardness, flexural strength, and fracture toughness of the composites are enhanced by 53.2%, 140%, and 180%, respectively. The strengthening and toughening mechanisms were also discussed.
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