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

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    • 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

  • Bulletin of Materials Science | News

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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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