29. Study of the Relationship Between the Young's Modulus and Microstructure of Vacuum Plasma Sprayed Boron Carbide

  1. Edgar Lara-Curzio
  1. H. R. Salimi Jazi,
  2. Fardad Azarmi,
  3. Thomas. W. Coyle and
  4. Javad. Mostaghimi

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291221.ch29

Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2

Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2

How to Cite

Jazi, H. R. S., Azarmi, F., Coyle, Thomas. W. and Mostaghimi, Javad. (2005) Study of the Relationship Between the Young's Modulus and Microstructure of Vacuum Plasma Sprayed Boron Carbide, in Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2 (ed E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291221.ch29

Author Information

  1. University of Toronto, Centre for Advanced Coating Technologies 40- St George Street, Room- 8292 Toronto, ON, M5S 3G8

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982329

Online ISBN: 9780470291221

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Keywords:

  • vacuum plasma sprayed;
  • elastic modulus;
  • thermal sprayed deposits;
  • ceramic coatings;
  • pore morphology

Summary

The influence of the structure of Vacuum Plasma Sprayed (VPS) boron carbide on the elastic modulus of the deposit was studied. Thermal sprayed structures consist of individual splats along with unmelted and partially melted particles, pores, microcracks, and splat boundaries. Thermal sprayed deposits exhibit anisotropic properties parallel and perpendicular to the splat plane. In the present study, micro-indentation hardness tests were performed on the vacuum plasma sprayed B4C to determine the elastic modulus parallel and perpendicular to the coating surface. Nano-indentation hardness tests were also performed on the cross-sectional microstructure to measure the elastic modulus parallel to the coating surface to compare with the values obtained from micro-indentation tests. A developed object oriented finite-element method also was performed to estimate the elastic modulus. The elastic modulus of the as-sprayed structure decreased significantly compared to the conventionally processed B4C materials. Due to an anisotropic microstructure, the perpendicular elastic modulus was lower than that parallel to the spray plane. Numerical simulations using finite element method confirmed anisotropic elastic behavior of the structure and highlighted the effect of splat boundaries on the elastic modulus in the as-sprayed structure.