Abstract
A new method of composite fabrication, called by the authors the internal crystallization method, was invented some years ago. The method is essentially based on growing fibres from a melt within the volume of a matrix. It has been successfully used to obtain a number of composites with a molybdenum matrix and various oxide fibres including those of sapphire, some oxide eutectics, complex oxides or rare earth metals and so on. A fibre can have either a single crystalline structure or a composite structure. The strength description of such fibres needs to take into account a variation of fibre cross-sectional shape with the variation of fibre volume fraction. A strength model of composites of the brittle fibre/metal matrix type suggested earlier is used to obtain statistical strength characteristics of fibres and to relate them to some details of the fabrication process. Creep strength of the composites is also studied and the results show superior performance of composites with eutectic fibres.
Published Version
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