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压痕-淬冷技术表征氧化锆/铁铝复合材料的抗热震性能

, PP. 104-109

Keywords: 压痕,抗热震性,复合材料

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Abstract:

采用压痕-淬冷技术研究了单相ZrO2(3Y)及ZrO2(3Y)/Fe3Al复合材料的抗热震性能。研究表明:单相ZrO2(3Y)及ZrO2(3Y)/Fe3Al复合材料的压痕裂纹在热震作用下具有相似的扩展模式:当△T△TU时,裂纹发生失稳扩展。复合材料的△TU明显高于单相ZrO2(3Y)。ZrO2(3Y)/Fe3Al复合材料较高的断裂韧性和导热率、较低的弹性模量和泊松比是导致△TU升高的主要原因。

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