Microstructure and interfacial characteristics of aluminium–diamond composite materials

This work reports about microstructure, morphology and interfacial characteristics of aluminium-based composites reinforced with micro- and nano-sized diamond particles. Composite samples were produced by pressurized liquid metal infiltration (squeeze casting) of tap-packed diamond powders, and stud...

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Bibliographic Details
Published in:Diamond and related materials 2004-03, Vol.13 (3), p.393-400
Main Authors: Khalid, F.A., Beffort, O., Klotz, U.E., Keller, B.A., Gasser, P.
Format: Article
Language:English
Subjects:
Aluminium–diamond composites
Interfacial structure and Al 4C 3
Microstructure
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Summary:This work reports about microstructure, morphology and interfacial characteristics of aluminium-based composites reinforced with micro- and nano-sized diamond particles. Composite samples were produced by pressurized liquid metal infiltration (squeeze casting) of tap-packed diamond powders, and studied by transmission electron microscopy (TEM) and Raman spectroscopy techniques. The micro-sized diamond particles were observed to be homogeneously dispersed and well bonded in the Al-matrix. However, the nano-sized diamond particles principally appear as large agglomerates in the Al-matrix, even though individual nano-sized diamonds are found to be finely dispersed in the Al-matrix too. The Al–diamond interface is generally clean, i.e. devoid of reaction products. However, an interfacial amorphous disordered carbon layer is occasionally observed, and in the composite with the nano-sized diamonds aluminium carbide phases (Al 4C 3) are randomly formed.
ISSN:0925-9635
1879-0062
DOI:10.1016/j.diamond.2003.11.095