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    • Effect of microstructure on the high temperature strength of nitride bonded silicon carbide composite

      J Rakshit P K Das

      Composites Volume 25 Issue 5 October 2002 pp 387-390

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/025/05/0387-0390

    • Keywords

       

      Nitride bonded silicon carbide composite; nitridation; microstructure.

    • Abstract

       

      Four compositions of nitride bonded SiC were fabricated with varying particle size of SiC of ∼ 9.67, ∼ 13.79, ∼ 60 𝜇 and their mixture with Si of ∼ 4.83 𝜇 particle size. The green density and hence the open porosity of the shapes were varied between 1.83 to 2.09 g/cc and 33.3 to 26.8 vol.%, respectively. The effect of these parameters on room temperature and high temperature strength of the composite up to 1300°C in ambient condition were studied. The high temperature flexural strength of the composite of all compositions increased at 1200 and 1300°C because of oxidation of Si3N4 phase and blunting crack front. Formation of Si3N4 whisker was also observed. The strength of the mixture composition was maximum.

    • Author Affiliations

       

      J Rakshit1 P K Das1

      1. Central Glass and Ceramic Research Institute, Kolkata 700 032, India

    • Dates

       
      Published
      October 2002
      Manuscript received
      15 March 2002
      Manuscript revised
      3 August 2002

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