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    • Sintering and oxidation in gel-coated SiCw/Al2O3 composites

      V Saraswati

      Volume 13 Issue 4 September 1990 pp 271-282

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/013/04/0271-0282

    • Keywords

       

      Sintering; gel-coating; coated whiskers; composites

    • Abstract

       

      Boehmite gel-coated SiC whiskers have been studied as discs and as dispersed in gel and commercial alumina. The coated whiskers oxidize and react to some extent in alumina-rich composite compacts when heated in vacuum. In the absence of alumina as matrix, discs of coated whiskers turned brittle on heating above 1600°C. A density of 3.7g/cc was obtained for compacts of SiC whiskers in submicron alumina when sintered pressureless for 2 h at 1600°C. A smooth interface, compatible with the matrix, has resulted in good mechanical properties.

    • Author Affiliations

       

      V Saraswati1

      1. Defence Metallurgical Research Laboratory, Kanchanbagh PO, Hyderabad - 500 258, India

    • Dates

       
      Published
      September 1990
      Manuscript received
      20 January 1990

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