Synthesis and Structure of Aluminum Substituted $MoSi_2$

Dasgupta, T and Bhattacharya, AK and Umarji, AM (2003) Synthesis and Structure of Aluminum Substituted $MoSi_2$. In: Solid State Communications, 126 (10). pp. 573-578.

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Abstract

$Mo(Si_1-_xAl_x)_2$ compositions have been prepared by a modified SHS route under pressure. The compositional phase analysis indicates a body centered tetragonal $C11_b$ phase below x<0.05 substitution, above which a biphasic region of $C11_b$ and C40 structure coexists. Occurrence of pure hexagonal C40 phase is observed for x >0.1. The aluminum substitution leads to a continuous increase in the lattice parameters in both these structures. In the biphasic region, redistribution of aluminum concentration takes place with the evolution of aluminum rich C40 phase as indicated by energy dispersive X-ray analysis and supported by micro-hardness measurements.

Item Type:	Journal Article
Publication:	Solid State Communications
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	A. Structural material;B. Chemical synthesis;B. SHS;C. Crystal structure and symmetry
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	06 Jun 2006
Last Modified:	19 Sep 2010 04:29
URI:	http://eprints.iisc.ac.in/id/eprint/7533

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