Microstructure and Mechanical Properties of Microwave Sintered Ti(C,N)-WC-Al2O3/Ti(C,N)-WC Laminated Ceramics

被引：0
作者：
Zhang G. [1 ]
Ji W. [1 ]
Dai S. [1 ]
Wu X. [1 ]
机构：
[1] State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, School of Mechanical Engineering, Hebei University of Technology, Tianjin
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2022年 / 50卷 / 12期
关键词：
Laminated composites; Mechanical properties; Microstructure; Microwave sintering; Titanium carbonitride;
D O I：
10.14062/j.issn.0454-5648.20220602
中图分类号：
学科分类号：
摘要：
Ti(C,N)-WC-Al2O3/Ti(C,N)-WC laminated ceramic materials with different layers and layer thickness ratios were prepared via microwave sintering. The variation of residual stress with layer number and layer thickness ratio was revealed by a finite element method, and the effects of layer number and layer thickness ratio on the macro-mechanical properties and micro-structural characteristics of the material were investigated. The results show that compared with the homogeneous material, the fracture toughness of the laminated material increases to 11.42 MPa•m1/2, which is 2.5 times greater than that of the homogeneous material, indicating a superior toughening effect. The main reason is a combined effect of macroscopic residual compressive stress and massive microscopic crack deflections. The fracture mode of the laminated material is an effective mixed fracture mode. In such a mode, the transgranular fracture of the surface layer and the intergranular fracture of the matrix layer alternate, which is conducive to the increase of fracture toughness and to the improvement of the overall strength of the material. © 2022, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：3212 / 3221
页数：9
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