Effect of partial mechanical alloying on the self-propagating high-temperature synthesis of Ni3Si

Self-propagating high-temperature synthesis (SHS) is a new method for economical processing of intermetallic compounds and ceramic materials, as well as composites based on them. On the other hand, mechanical alloying is an effective method for producing highly metastable and, therefore, reactive me...

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Bibliographic Details
Published in:Journal of materials science 1999-04, Vol.34 (7), p.1477-1482
Main Authors: LAGERBOM, J, TIAINEN, T, LEHTONEN, M, LINTULA, P
Format: Article
Language:English
Subjects:
Alloy powders
Alloying effects
Applied sciences
Corrosion resistance
Corrosion tests
Exact sciences and technology
Heat treating
High temperature
Intermetallic compounds
Materials science
Mechanical alloying
Metal powders
Metals. Metallurgy
Oxidation resistance
Particle size distribution
Particulate composites
Production methods
Production of alloys
Production of metals
Production of non ferrous metals. Process materials
Self propagating high temperature synthesis
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Summary:Self-propagating high-temperature synthesis (SHS) is a new method for economical processing of intermetallic compounds and ceramic materials, as well as composites based on them. On the other hand, mechanical alloying is an effective method for producing highly metastable and, therefore, reactive metal powders. In this paper an overview of partial mechanical alloying is given. The effect of partial mechanical alloying on the self-propagating high-temperature synthesis of Ni3Si-compounds is studied. The influence of alloying time on powder characteristics, e.g. particle size distribution, is given. The effect of alloying time on the properties of Ni–Si composite powders and on the characteristics of the SHS process, e.g. propagation rate, is reported. Ni3Si was chosen as the object for this study because of its corrosion and high-temperature oxidation resistance. Like other L12-type compounds, the strength of Ni3Si shows an anomalous behaviour as a function of temperature, therefore, it has potential for high-temperature applications.
ISSN:0022-2461
1573-4803
DOI:10.1023/A:1004535407965