Microstructure and mechanical properties of pressureless sintered B4C-C composite using phenolic resin

A. Nikravan; H. R. Baharvandi; F. B. Jebelli; H. Abdizadeh; N. Ehsani

doi:10.1117/12.780337

27 November 2007 Microstructure and mechanical properties of pressureless sintered B₄C-C composite using phenolic resin

A. Nikravan, H. R. Baharvandi, F. B. Jebelli, H. Abdizadeh, N. Ehsani

Proceedings Volume 6423, International Conference on Smart Materials and Nanotechnology in Engineering; 64235M (2007) https://doi.org/10.1117/12.780337
Event: International Conference on Smart Materials and Nanotechnology in Engineering, 2007, Harbin, China

Abstract

Boron carbide is an extremely promising material for a variety of applications that require high hardness and good wear resistance. However, due to the very high sintering temperatures which are required for B₄C densification, wide spread use of that is limited. Various solutions have been studied to modifying densification behavior of B₄C. Pressureless sintering in the presence of different additives has been tried by researchers. The effect of additives such as TiB₂, SiC, Al, B, ZrO₂, talc and Si have been evaluated. It was shown that the densification and mechanical properties may be improved with sintering aids. The Effects of phenolic resin additive on the microstructure and mechanical properties of B₄C were explained in this study. Experimental composition was batched corresponding from 0 to 10 wt% of the additive. All samples were sintered for 60 minutes at 2150°C. The heating and cooling rates were 10°C/min for all samples. It was found that below 7.5 wt% of phenolic resin additive, the density increased with additive increasing and above that, decreased by phenolic resin addition. Mechanical properties such as fracture toughness, strength and hardness increased as a result of densification enhancement.

Citation Download Citation

A. Nikravan, H. R. Baharvandi, F. B. Jebelli, H. Abdizadeh, and N. Ehsani "Microstructure and mechanical properties of pressureless sintered B₄C-C composite using phenolic resin", Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64235M (27 November 2007); https://doi.org/10.1117/12.780337

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