Microstructure and thermal properties of diamond/aluminum composites with TiC coating on diamond particles
Microstructure and thermal properties of diamond/aluminum composites with TiC coating on diamond particles
复制标题
金刚石颗粒上TiC涂层金刚石/铝复合材料的显微组织和热性能
DOI：
10.1016/j.matchemphys.2010.08.003
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发表时间：
2010-11-01
影响因子：
4.6
通讯作者：
Tan, W.
中科院分区：
文献类型：
--
作者：
Feng, H.;Yu, J. K.;Tan, W.
为改善金刚石/铝复合材料中金刚石颗粒与铝合金之间的界面结合，提出在金刚石颗粒表面涂覆碳化钛涂层。采用气压浸渗法制备了金刚石颗粒表面包覆TiC的金刚石/铝复合材料。用光学显微镜和扫描电子显微镜对复合材料进行了表征，并测量了复合材料的热性能，包括导热系数和热膨胀系数。结果表明，由于TiC涂层的存在，增强了金刚石颗粒与铝基体之间的界面结合，复合材料的断裂机制为基体的延性断裂和界面脱粘相结合。通过在金刚石颗粒上涂覆TiC涂层，获得了良好的界面，从而改善了金刚石的热性能，包括降低了热膨胀和提高了导热系数。(C)2010爱思唯尔B.V.保留所有权利。
A titanium carbide coating on the surface of diamond particles was proposed to improve the interfacial bonding between diamond particles and aluminum alloy for diamond/aluminum composites. The diamond/aluminum composites with the TiC coating on diamond particles were fabricated by gas pressure infiltration. The composites were characterized with optical microscope and scanning electron microscopy and by measuring thermal properties, including thermal conductivity and coefficient of thermal expansion. The results show that the interface adhesion between the diamond particles and the aluminum matrix is strengthened due to the existence of the TiC coating, and the fracture mechanism of the composites is a combination of matrix's ductile fracture and interfacial debonding. Improvements in thermal properties, including a reduced thermal expansion and a high thermal conductivity, have been achieved by the TiC coating on diamond particles to get the good interface. (C) 2010 Elsevier B.V. All rights reserved.