Evaluation of Fracture Toughness Distribution in Ceramic-Metal Functionally Graded Materials
Evaluation of Fracture Toughness Distribution in Ceramic-Metal Functionally Graded Materials
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DOI：
10.4028/www.scientific.net/kem.345-346.497
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发表时间：
2007-08
期刊：
影响因子：
--
通讯作者：
K. Tohgo;H. Araki;Y. Shimamura
中科院分区：
文献类型：
--
作者：
K. Tohgo;H. Araki;Y. Shimamura
本文研究了由部分稳定氧化锆 (PSZ) 和奥氏体不锈钢 SUS 304 组成的功能梯度材料 (FGM) 的断裂韧性评估。使用 PSZ 和两种 SUS 304 粉末，通过粉末冶金法制造了具有精细和粗糙微观结构的 FGM 和非梯度复合材料 (non-FGM)。断裂韧性是通过对每种材料成分的几种非 FGM 进行常规测试以及利用 FGM 的稳定裂纹扩展的方法来确定的。根据实验结果，讨论了断裂机制、微观结构对断裂韧性的影响以及FGM 和非FGM 之间断裂韧性的差异。
This paper deals with evaluation of fracture toughness in functionally graded materials (FGMs) consisting of partially stabilized zirconia (PSZ) and austenitic stainless steel SUS 304. FGMs and non-graded composites (non-FGMs) with fine and coarse microstructures are fabricated by powder metallurgy using PSZ and two kinds of SUS 304 powders. The fracture toughness is determined by conventional tests for several non-FGMs with each material composition and by a method utilizing stable crack growth for FGMs. Based on the experimental results, fracture mechanism, influences of microstructure on fracture toughness, and difference in fracture toughness between the FGMs and non-FGMs has been discussed.