MoSi2 and MoSi2 - Based Materials as Structural Ceramics

Sheela, K Ramasesha and Srikari Tantri, P and Bhattacharya, Anup K (2000) MoSi2 and MoSi2 - Based Materials as Structural Ceramics. Metals Materials And Processes, 12 (2 & 3). pp. 181-190.

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    Abstract

    MoSi2, because of its mixed covalent-metallic atomic bonding, is a borderline intermetallic compound which has many attractive properties that can be exploited in high temperature structural applications . Foremost amongst these is its stability in corrosive atmospheres up to about 1600 C . However, there are a few undesirable prooperties that need to be addressed before it can become a viable material in high temperature applications . Since MoSi2 forms thermodynamically stable composites with both metals and ceramics, many reinforcing materials are incorporated into the matrix to improve the fracture toughness and creep properties . The low temperature oxidation can be controlled by compaction to high density . Mo(Al, Si)2, a related ceramic, which also has good high temperature properties besides having better low temperature toughness . However, presence of Mo5Si3 phase, which has low oxidation resistance, needs to be controlled . This is being achieved by synthesizing Mo(Al, Si)2 at as low a temperature as 1300 C. This article summarizes important attempts that are made in improving the properties of MoSi2 by reinforcement with other materials .

    Item Type: Journal Article
    Uncontrolled Keywords: ceramics, MoSi2, reinforcement, mechanical properties
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Materials Science Division, Materials Science Division, Materials Science Division
    Depositing User: Ms Indrani V
    Date Deposited: 30 Jan 2012 11:08
    Last Modified: 30 Jan 2012 11:08
    URI: http://nal-ir.nal.res.in/id/eprint/10280

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