Interfacial characteristics of diamond/aluminum composites with high thermal conductivity fabricated by squeeze-casting method

Journal Article · Sat Aug 15 00:00:00 EDT 2015 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2015.06.023· OSTI ID:22476141

Jiang, Longtao ^[1]; Wang, Pingping ^[1]; Xiu, Ziyang ^[2]; Chen, Guoqin ^[1]; Lin, Xiu ^[3]; Dai, Chen; Wu, Gaohui ^[1]

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1. Department of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001 (China)
2. Skate Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001 (China)
3. Heilongjiang Academy of Industrial Technology, Harbin 150001 (China)

In this work, aluminum matrix composites reinforced with diamond particles (diamond/aluminum composites) were fabricated by squeeze casting method. The material exhibited a thermal conductivity as high as 613 W / (m · K). The obtained composites were investigated by scanning electron microscope and transmission electron microscope in terms of the (100) and (111) facets of diamond particles. The diamond particles were observed to be homogeneously distributed in the aluminum matrix. The diamond{sub (111)}/Al interface was found to be devoid of reaction products. While at the diamond{sub (100)}/Al interface, large-sized aluminum carbides (Al{sub 4}C{sub 3}) with twin-crystal structure were identified. The interfacial characteristics were believed to be responsible for the excellent thermal conductivity of the material. - Graphical abstract: Display Omitted - Highlights: • Squeeze casting method was introduced to fabricate diamond/Al composite. • Sound interfacial bonding with excellent thermal conductivity was produced. • Diamond{sub (111)}/ aluminum interface was firstly characterized by TEM/HRTEM. • Physical combination was the controlling bonding for diamond{sub (111)}/aluminum. • The growth mechanism of Al{sub 4}C{sub 3} was analyzed by crystallography theory.

• OSTI ID: 22476141
• Journal Information: Materials Characterization, Vol. 106; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
ALUMINIUM CARBIDES
COMPOSITE MATERIALS
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
DIAMONDS
INTERFACES
SCANNING ELECTRON MICROSCOPY
SOUND WAVES
THERMAL CONDUCTIVITY
TRANSMISSION ELECTRON MICROSCOPY