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Toshiba Corp
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Toshiba Corp
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Application filed by Toshiba CorpfiledCriticalToshiba Corp
Priority to JP62233929ApriorityCriticalpatent/JP2726419B2/en
Publication of JPS6476971ApublicationCriticalpatent/JPS6476971A/en
Application grantedgrantedCritical
Publication of JP2726419B2publicationCriticalpatent/JP2726419B2/en
PURPOSE:To enable formation of silicon nitride-based ceramic having high fracture strength and fracture toughness, by blending a silicon nitride matrix with fibers consisting essentially of silicon carbide in a specific ratio of long fibers and short fibers thereof. CONSTITUTION:Fiber reinforced silicon nitride-based ceramic wherein fibers consisting essentially of silicon carbide are dispersed into a silicon nitride matrix, using the fibers having the following constitution. Namely 10-60wt.% sum of long fibers having >=200mum length and >=10mum diameter and short fibers having <=200mum length and <=10mum diameter is added to the matrix and the ratio of the long fibers in the fibers is adjusted to 20-80wt.%.
Fiber reinforced cementitious materials with improved toughness and ductility with the fibres of one component having a Youngs Moudulus of at least 30 gigapascals