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Molecular Dynamics Simulation of High Temperature Mechanical Properties of Nano-Polycrystalline Beryllium Oxide and Relevant Experimental Verification

Author

Listed:
  • Ming-Dong Hou

    (Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)

  • Xiang-Wen Zhou

    (Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)

  • Malin Liu

    (Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)

  • Bing Liu

    (Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)

Abstract

This article investigated the deformation behavior of nano-polycrystalline beryllium oxide under tensile and compressive stress using the molecular dynamics simulation method. Both the tensile and compressive test results indicate that beryllium oxide breaks mainly along grain boundaries. At low temperature, there is little internal deformation of beryllium oxide grains. When the temperature is above 1473 K, the internal deformation of beryllium oxide grains also occurs, and the phenomenon becomes more obvious with the increase in temperature. This deformation within the grain should be plastic. The flexural strength fracture morphology of beryllium oxide also shows that the fracture mode of beryllium oxide is a brittle fracture at low temperature, while the slip bands appear at 1773 K. This indicates that beryllium oxide, as a ceramic material, can also undergo plastic deformation under high temperature and stress.

Suggested Citation

  • Ming-Dong Hou & Xiang-Wen Zhou & Malin Liu & Bing Liu, 2023. "Molecular Dynamics Simulation of High Temperature Mechanical Properties of Nano-Polycrystalline Beryllium Oxide and Relevant Experimental Verification," Energies, MDPI, vol. 16(13), pages 1-9, June.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:13:p:4927-:d:1178586
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    Cited by:

    1. Evgeniy Prikhodko & Alexandr Nikiforov & Akmaral Kinzhibekova & Alexandr Paramonov & Nazgul Aripova & Amangeldy Karmanov, 2023. "Analysis of the Effect of Temperature on the Ultimate Strength of Refractory Materials," Energies, MDPI, vol. 16(18), pages 1-12, September.

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