229 C/C 複合材料の圧縮強度

概要

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Carbon fiber reinforced carbon matrix composite materials (C/Cs) possess excellent properties at extremely high temperatures. Among them, the most advantageous is to hold the high strength-to-weight ratio at extremely high temperatures. However, we can hardly say that mechanical properties of C/Cs are well understood. The compressive strength of C/Cs is one of such properties. Concerning to compressive failure, even the test method has not been established. The object of the present paper is to establish testing method of compressive strength from room temperature to extremely high temperatures. Thus, compressive tests of C/Cs were performed using various shapes of specimens without supporting jigs so as to find effective specimen type for high temperature tests. Then, using optimized specimen, the compressive strength of a 3-D C/C was determined as a function of temperature up to 2000℃. It was found that the compressive strength of the C/C monotonically increased with temperature. This enhancement was shown to be brought by enhancement of the fiber/matrix interface.
一般社団法人日本機械学会の論文
2003-10-17