2727 冷却構造を有するセラミックス基複合材料の熱サイクル下における耐久性(S28-1 セラミックスおよびセラミックス系複合材料(1),S28 セラミックスおよびセラミックス系複合材料)

概要

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The 3D-woven SiC/SiC composites with the transpiration cooling structure were evaluated in comparison with the composites without the cooling structure, under high temperature and thermal cycling conditions. A surface of the specimen was heated by burner furnace and cooled by atmospheric air during the thermal cycles. The other side surface was continuously cooled by pressured air during the thermal cycling. The residual bending strength after the tests were measured and compared to the strength of untreated samples. As a result, the SiC/SiC composites with the transpiration cooling structure showed almost no decrease in strength and the other composites showed large decrease in strength with cracks that formed perpendicular to fiber yarns on heated surface. It is concluded the cooling structure in the SiC/SiC composites improves the resistance under thermal cycling.
社団法人日本機械学会の論文
2006-09-15