IGTC-115 Fundamental Studies on Microscopic Damage Initiation and Growth in Glass Matrix Composites : Towards Optimum Fiber/Matrix Interface/Interphase for Damage Tolerance Design(Organized Session II ADVANCED MATERIALS)

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This paper summarizes some major results obtained through our international joint research program entitled "Fundamental studies on the effects of interfaces on microfracture mechanisms of high temperature CMC" (April 1991-March 1994), supported by NEDO (New Energy and Industrial Technology Development Organization), Japan, which cover (a) composite fabrication, (b) interfacial characterization, (c) measurement of single fiber/matrix interfacial strength, (d) macroscopic mechanical testing of multiple fiber composites, (e) microscopic evaluation of failure process, (f) environmental effects, and (g) analytical modeling of interfaces and composites. Borosilicate (BS) glass matrix composites unidirectionally reinforced by three types of SiC fibers with different carbon coating thickness were chosen for systematic characterization. Material fabrication science, microscopic interfacial structure characterization, and macroscopic material properties were combined to understand the governing microfracture mechanisms and to find the optimum combinations of fibers, matrix, and interfaces/interphases.
公益社団法人日本ガスタービン学会の論文