Effect of Na2O on Mechanical Properties of MoSi2/Oxide Composites for Heating Elements

Journal of Inorganic Materials

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Effect of Na₂O on Mechanical Properties of MoSi₂/Oxide Composites for Heating Elements

WANG Gang¹; JIANG Wan¹; ZHAO Shi-Ke²

1.State Key Lab of High Performance Ceramics and Superfine Microstructure; Chinese Academy of Sciences; Shanghai 200050; China; 2.Department of Materials Science and Engineering Tsinghua University; Beijing 100081; China

Received:2001-11-26 Revised:2002-06-25 Published:2003-01-20 Online:2003-01-20

Abstract

Abstract: The effect of Na₂O on mechanical properties of MoSi₂/oxide composites for heating elements
was investigated. The results obtained show that the specimens with low Na₂O content possess higher bending strength and Weibull modulus after
heat treatment at 1773K for 100h. Furthermore, removed Na composites have better creep resistance and higher BDTT. Their creep strain rate is 2/5
and 1/3 or less than that of the unremoved Na composites at 1243K and 1303K, respectively, and their BDTT is increased 100K.

Key words: MoSi2 heating element, Na₂O, weibull modulus, creep, BDTT

CLC Number:

TQ174

WANG Gang,JIANG Wan,ZHAO Shi-Ke. Effect of Na₂O on Mechanical Properties of MoSi₂/Oxide Composites for Heating Elements[J]. Journal of Inorganic Materials.

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Effect of Na₂O on Mechanical Properties of MoSi₂/Oxide Composites for Heating Elements

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