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Effect of mechanical alloying on combustion synthesis of MoSi2

Published online by Cambridge University Press:  31 January 2011

Hyung-Sang Park ,
Kwang-Seon Shin  and
Yong-Seog Kim
Hyung-Sang Park
Affiliation:
Division of Materials Science and Engineering, Seoul National University, Seoul 151–742, Korea
Kwang-Seon Shin
Affiliation:
Division of Materials Science and Engineering, Seoul National University, Seoul 151–742, Korea
Yong-Seog Kim
Affiliation:
Department of Metallurgy and Materials Science, Hong Ik University, Seoul 121–791, Korea
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Abstract

Characteristics of the combustion synthesis of MoSi2 using elemental Mo and Si powder mixtures prepared by mechanical alloying were investigated. The mechanical alloying resulted in powders of pseudolamellar structure and a partial conversion of the elemental powders to hexagonal MoSi2 phase. Combustion reaction of the mixture was ignited around 670 °C, which is much lower than that with the powder prepared by low-energy ball milling. A mathematical model was developed to demonstrate the possibility of the ignition of the combustion reaction of the lamellar structure via a solid-state diffusional process. On the basis of model, effects of mechanical alloying time on the ignition temperature and combustion temperature are discussed.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 11 , November 2001 , pp. 3060 - 3068
Copyright
Copyright © Materials Research Society 2001

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