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

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.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [3] ; ;  [1]
  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)
Publication Date:
OSTI Identifier:
22476141
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 106; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; ALUMINIUM CARBIDES; COMPOSITE MATERIALS; CRYSTAL STRUCTURE; CRYSTALLOGRAPHY; DIAMONDS; INTERFACES; SCANNING ELECTRON MICROSCOPY; SOUND WAVES; THERMAL CONDUCTIVITY; TRANSMISSION ELECTRON MICROSCOPY