Paper Title:

Bridging Toughening Mechanism of Fiber Eutectics and Transformation Particles Composite Ceramic

Periodical Advanced Materials Research (Volume 177)
Main Theme Testing and Evaluation of Inorganic Materials I
Edited by Yiwang Bao, Li Tian and Jianghong Gong
Pages 178-181
DOI 10.4028/www.scientific.net/AMR.177.178
Citation Xin Hua Ni et al., 2010, Advanced Materials Research, 177, 178
Online since December, 2010
Authors Xin Hua Ni, Xie Quan Liu, Bao Hong Han, Guo Hui Zhong, Tao Sun
Keywords Bridging Stress, Bridging Toughening, Fiber Eutectic, Transformation Particle
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Abstract

Based on the microstructure of fiber eutectics and transformation particles composite ceramic, the bridging stress of the fiber eutectic is determined. The bridging load that makes crack closure to reduce the stress concentration of crack tip is calculated. The energy dissipative value of the bridging load is obtained by considering the random orientation of the fiber eutectic. Finally, according to the relationship of the fracture toughness and energy dissipation, the bridging toughening mechanism is established. Analysis shows that the bridging toughening value is enhanced with the increasing of volume fraction and fracture strength of fiber eutectic, and enhanced with the decreasing of interface bonding strength and length-diameter ratio.