Influence of Features of Interphase Boundaries on Mechanical Properties and Fracture Pattern in Metal–Ceramic Composites
Influence of Features of Interphase Boundaries on Mechanical Properties and Fracture Pattern in Metal–Ceramic Composites
复制标题
相界面特征对金属陶瓷复合材料力学性能和断裂模式的影响
DOI：
10.1016/j.jmst.2013.08.002
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发表时间：
2013
影响因子：
10.9
通讯作者：
A. A. Mokhovikov
中科院分区：
文献类型：
--
作者：
S. Psakhie;S. Psakhie;V. Ovcharenko;B. B. Yu;E. Shilko;S. Astafurov;Y. Ivanov;A. Byeli;A. A. Mokhovikov
本文从理论上研究了金属-陶瓷复合材料中相界面强度对复合材料响应的宏观特性，如强度、变形能力、断裂能和断裂模式的影响。该研究是通过计算机辅助模拟，通过移动元胞自动机方法考虑到一个发达的“细观”结构模型的颗粒增强复合材料。研究表明，界面相的强度不仅决定了金属陶瓷复合材料的强度性能，而且也决定了复合材料的断裂方式和断裂速率。讨论了在金属-陶瓷组合物中由于在相间边界处形成宽过渡区（化学成分可变的区域）而实现颗粒/粘结剂界面的高强度值的原理。模拟结果证实，这种过渡区提供了断裂机制的变化，并使金属陶瓷复合材料的高强度和高变形能力的实现成为可能。
The results of a theoretical study on the influence of strength of interphase boundaries in metal–ceramic composite on macroscopical characteristics of composite response such as strength, deformation capacity, fracture energy and fracture pattern are presented. The study was conducted by means of computer-aided simulation by means of movable cellular automaton method taking account of a developed “mesoscopical” structural model of particle-reinforced composite. The strength of interphase boundaries is found to be a key structural factor determining not only the strength properties of metal–ceramic composite, but also the pattern and rate of fracture. The principles for achievement of the high-strength values of particle/binder interfaces in the metal–ceramic composition due to the formation of the wide transition zones (areas of variable chemical composition) at the interphase boundaries are discussed. Simulation results confirm that such transition zones provide a change in fracture mechanism and make the achievement of a high-strength and a high deformation capacity of metal–ceramic composite possible.