|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Materials for Transportation and Lightweighting
||PAN-32: Heat Treatment of Reaction Bonded Composites
||Evgeni Ionash, Helen Dilman, Shmulik Hayun, Nachum Frage
|On-Site Speaker (Planned)
Under the conditions of the reaction bonded composites fabrication only limited amount of Si is involved in the interaction and the fraction of new formed SiC is also limited. We suggest to apply an additional thermal treatment of the infiltrated composites within the liquid soda-lime glass at 1400°C, when Si evaporation is completely avoided. We tested the suggested approach using SiC + B4C mixture with 40%wt. of boron carbide. The relative green density of compact was about 65% and the hardness value of the infiltrated composite is about 1300HV. After 24 hours of heat treatment in glass at 1400°C the hardness increased up to 1500HV. SEM analysis of the heat treated specimens confirms that the fraction of SiC increased, while the fraction of residual Si decreased. The suggested conditions of heat treatments may be a promising for hardness increasing and improving a ballistic efficient of reaction bonded SiC composites.
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