1729 CVD-SiC 被覆 C/C 複合材料の超高温大気中引張強度の評価

概要

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The tensile tests of the non-coated bare and SiC-coated C/C composites were carried out in air at elevated temperatures (RT-1600℃). The specimens were first exposed in air at a testing temperature for 600s under a constant strain of ε=0.13%, and then loaded to the failure. It was shown from the experimental results that the oxidative damage of the SiC-coated substrate at 1200℃ was induced only just below the coating cracks causing a groove with a semi-circular cross-section. This indicates that the residual strength SiC-coated substrate can be predicted from the apparent remaining cross-section. The increase in the oxidative groove radius was also predicted using the decrease in the applied load during the exposure. The predicted oxidative groove radius showed good agreement with the measured value.
一般社団法人日本機械学会の論文
2000-07-31