Microstructure and mechanical properties of a three-layer B4C/Al–B4C/TiB2–B4C composite
Microstructure and mechanical properties of a three-layer B4C/Al–B4C/TiB2–B4C composite
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DOI：
10.1016/j.matdes.2012.10.035
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发表时间：
2013-04
影响因子：
8.4
通讯作者：
X. Yue;Jianjun Wang;Shang-Hua Yu;W. Wang;H. Ru
中科院分区：
文献类型：
--
作者：
X. Yue;Jianjun Wang;Shang-Hua Yu;W. Wang;H. Ru
采用热压和真空渗铝两步法制备了B4C/Al、B4C/ tib2和B4C复合材料的三层结构材料。三层B4C/ Al-B4C / TiB2-B4C复合材料界面结合良好。在铝渗透之前，三层预制件中的B4C多孔层看起来像一个相互连接的毛细血管的三维网络。渗铝前后，B4C/ tib2和B4C层的显微组织均无明显变化。三层复合材料的断裂韧性高于B4C材料，综合硬度高于B4C/Al材料。
A three-layer structure material, consisting of B4C/Al, B4C/TiB2and B4C composites, was obtained using a two-step method for both hot pressing and aluminum infiltration in vacuum. The three-layer B4C/Al–B4C/TiB2–B4C composite showed good interfacial bonding. Before aluminum infiltration the B4C porous layer in the three-layer preform looked like a three-dimensional network of interconnected capillaries. The microstructures of both B4C/TiB2and B4C layers showed no apparent changes before and/or after aluminum infiltration. The three-layer composite showed improved fracture toughness than that of B4C material and higher comprehensive hardness than that of B4C/Al material.