Synthesis, microstructure evolution, and mechanical properties of (Cr_1-xV_x)_2AlC ceramics by in situ hot-pressing method
Synthesis, microstructure evolution, and mechanical properties of (Cr_1-xV_x)_2AlC ceramics by in situ hot-pressing method
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DOI：
10.1557/jmr.2014.91
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发表时间：
2014-05
影响因子：
2.7
通讯作者：
Jianfeng Zhu;Hao Jiang;Fen Wang;Q. Ma
中科院分区：
文献类型：
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作者：
Jianfeng Zhu;Hao Jiang;Fen Wang;Q. Ma
Nearly dense and almost single-phase bulk (Cr_1- x V_x)_2AlC ( x = 0, 0.25, 0.5, 0.75, and 1.0) ceramics were successfully fabricated by in situ hot-pressing method using Cr, V, Al, and C powders as raw materials. A possible synthesis mechanism was proposed to explain the formation of (Cr_1- x V_x)_2AlC solid solutions. The lattice parameters, microstructure, and mechanical properties of the (Cr_1- x V_x)_2AlC ceramics were investigated in detail. The results indicated that the lattice parameters increased with the substitution of Cr by V and the aspect ratio of the grain changed from 1.4 to 3.2. The dependence of the mechanical properties on the V content was a single-peak type. The (Cr_0.5V_0.5)_2AlC ceramic possessed the optimal mechanical performance and its Vickers hardness, flexural strength, and fracture toughness reached the maximum values of 5.18 GPa, 402 MPa, 5.91 MPa m^1/2, respectively, due to the solid solution effect. The energy-consuming mechanisms of the material were also discussed.
