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Effects of BN content on the structural and mechanical properties of a-SiBN ceramics

  • Ningbo Liao , Wei Xue , Hongming Zhou and Miao Zhang
Published/Copyright: August 17, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 104 Issue 2

Abstract

SiBN has the advantages of Si3N4 at high temperature and also presents good mechanical properties. Understanding the structural and mechanical properties of SiBN is essential in order to control the properties under fabrication. In this paper, the effects of BN content on structural and mechanical properties of SiBN ceramics were investigated using atomistic simulation. Phase separation of the SiN-rich region and the BN-rich region was observed for all the three compositions. With BN content increases, the BN-rich regions tend to be larger and the SiN-rich regions become smaller. Interestingly, Si3B3N7 shows different structural and mechanical properties compared with Si3BN5 and Si3B5N9: 1) sharper and narrower peaks for pair distribution functions and angular distribution. 2) larger values but less stability for Young's moduli at high temperatures. The larger Young's modulus of Si3B3N7 is attributed to the network structure of BN and SiN phase.

Keywords: Amorphous materials; Ceramics; Mechanical properties; Molecular dynamics
* Correspondence address, Dr. Ningbo Liao, College of Mechanical & Electrical Engineering, Wenzhou University, Wenzhou 325035, P.R. China, Tel.: +86-577-86689138, Fax: +86-577-86689138, E-mail:

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Received: 2011-7-5
Accepted: 2012-8-2
Published Online: 2013-08-17
Published in Print: 2013-02-15

© 2013, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110851
Keywords for this article
Amorphous materials; Ceramics; Mechanical properties; Molecular dynamics

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Structure of composites consolidated from ball milled 7475 aluminum alloy and ZrO2 powders
  5. Isothermal section of the Al-Tb-V ternary system at 773 K
  6. Development of an atomic mobility database for disordered and ordered fcc phases in multicomponent Al alloys: focusing on binary systems
  7. Effect of additive and current density on microstructure and texture characteristics of copper electrodeposits
  8. Magnetic properties and microwave absorption properties of carbon fibers coated with FeCo alloy
  9. Effects of BN content on the structural and mechanical properties of a-SiBN ceramics
  10. Structural and relaxor characteristics of Ca0.18Sr0.226Ba0.594Nb2O6
  11. Study on the dielectric properties of CaCu3Ti4O12 ceramics using the one-dimensional Ising model
  12. Erosion wear performance of a surface diffusion alloyed coating on pure magnesium
  13. Evaluation of the quality of cladding deposited on continuous steel casting rolls
  14. Investigating the machinability of austempered ductile irons with dual matrix structures
  15. Simple preperation of CuO nanoparticles and submicron spheres via ultrasonic spray pyrolysis (USP)
  16. Fabrication of transparent Nd:YAG ceramic by vacuum sintering with CaF2 additive
  17. Synthesis and characterization of new Bi2FeNiO6 material using a citric acid assisted gel combustion technique
  18. Processing and characterization of up-converting Er3+ doped (Lu0.5Y0.5)2O3 nanophosphor
  19. People
  20. People
  21. DGM News
  22. DGM News
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