J. Mater. Sci. Technol.

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Influence of Features of Interphase Boundaries on Mechanical Properties and Fracture Pattern in MetaleCeramic Composites

Sergey Psakhie1,2), Vladimir Ovcharenko1), Baohai Yu3), Evgeny Shilko1), Sergey Astafurov1),Yury Ivanov4), Alexey Byeli5), Alexey Mokhovikov6)   

  1. 1) Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, Tomsk 634021, Russia
    2) Institute of High Technology Physics, Tomsk Polytechnic University, Tomsk 634050, Russia
    3) Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences,Shenyang 110016, China
    4) Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences, Tomsk 634055, Russia
    5) Physical-Technical Institute, National Academy of Sciences of Belarus, Minsk 220141, Belarus
    6) Yurga Technological Institute, Tomsk Polytechnic University, Yurga 652055, Russia
  • Received:2012-07-04 Revised:2012-10-31 Online:2013-11-30 Published:2013-11-06
  • Contact: E. Shilko
  • Supported by:

    SB RAS Program III.20.2 for Basic Research and at partial financial support of the RFBR Grant No. 11-08-12069-ofi-m-2011

Abstract:

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.

 

Key words: Metaleceramic composites, Particle-reinforced composite, Interphase boundaries, Discrete element based analysis, Strength and fracture energy, Fracture pattern