In situ thermal observation of explosive compound-formation reaction during mechanical alloying

The formation of Al-Ni compounds by ball milling of elemental powders has been investigated by means of in situ thermal analysis, X-ray diffraction, and scanning electron microscopy. The results show that AlNi forms in an explosive, exothermic reaction, driven by the large heat of compound formation...

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Bibliographic Details
Published in:Physical review letters 1990-01, Vol.64 (4), p.487-490
Main Author: ATZMON, M
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metal powders
Metals, semimetals and alloys
Metals. Metallurgy
Physics
Powder metallurgy. Composite materials
Production techniques
Specific materials
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Summary:The formation of Al-Ni compounds by ball milling of elemental powders has been investigated by means of in situ thermal analysis, X-ray diffraction, and scanning electron microscopy. The results show that AlNi forms in an explosive, exothermic reaction, driven by the large heat of compound formation. The mechanism discovered is suggested to explain the mechanical alloying of other systems. (Author)
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.64.487