In:
Solid State Phenomena, Trans Tech Publications, Ltd., Vol. 186 ( 2012-3), p. 202-205
Abstract:
Microstructure of two types of 7475 aluminum alloy matrix composites with additions of 10 wt.% and 20 wt.% of Al 2 O 3 or AlN were investigated. Pre-alloyed 7475 aluminum powders were mixed with ceramic particles and milled in a high energy planetary Fritsch ball mill for up to 40h. Subsequently, it was compacted at 380°C/600 MPa. The microstructure of the obtained composites was studied using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The performed investigations proved that both types of composites show a good dispersion of ceramic phases. The composite matrix was characterized by fine grain size, i.e. less than 100 nm and contained a high density of even smaller, Zn, Cu or Fe rich precipitates. The EDS chemical analysis indicated local presence of MgO at the metal/ceramic interfaces in both types of composites. The presented approach allowed to produce a composite with AlN or Al 2 O 3 particles in nano-crystalline aluminium alloy matrix.
Type of Medium:
Online Resource
ISSN:
1662-9779
DOI:
10.4028/www.scientific.net/SSP.186
DOI:
10.4028/www.scientific.net/SSP.186.202
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2012
detail.hit.zdb_id:
2051138-3
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