Direct nitridation of molten Al(Mg,Si) alloy to AlN
authors Haibo, J; Chen, K; Heping, Z; Agathopoulos, S; Fabrichnaya, O; Ferreira, JMF
nationality International
journal JOURNAL OF CRYSTAL GROWTH
author keywords capillarity; crystal morphology; mass transfer; thermodynamics; growth from melt; alloys; nitrides
keywords MAGNESIUM SILICON ALLOYS; ALUMINUM NITRIDE; AL2O3/METAL COMPOSITES; GROWTH MECHANISMS; OXIDATION; MORPHOLOGIES; WHISKERS; OXIDES
abstract The growth of AIN rod-like crystals, successfully produced via direct nitridation of Al-alloy doped with 5 wt% Mg and 2 wt% Si at 1273 K is predominantly based on capillary niass-transfer phenomena, which occur through a network of micro-channels developed in the empty space among the AIN columnar crystals as well as the hollows inside these crystals. The diffusion of N-2 in the liquid alloy is the rate-determining step of the process. Mg and Mg3N, resulting after nitridation maintain a very low partial pressure of oxygen during the entire process and favour the formation of AIN. (c) 2005 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0022-0248
year published 2005
volume 281
issue 2-4
beginning page 639
ending page 645
digital object identifier (doi) 10.1016/j.jcrysgro.2005.04.024
web of science category Crystallography; Materials Science, Multidisciplinary; Physics, Applied
subject category Crystallography; Materials Science; Physics
unique article identifier WOS:000231011600062
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journal impact factor 1.632
5 year journal impact factor 1.684
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