Journal of Material Sciences & Engineering

Department of Materials Science and Engineering, The Pennsylvania State University, USA

Publications

• Research   
  Developing a Practical Chemical Process to Prepare Boron-Doped Carbon (CBx) Materials with High Thermal-Oxidative Stability
  Author(s): Joseph Vandy Sengeh, Wei Zhu, Houxiang Li and T. C. Mike Chung*
  
  This paper discusses a new method to prepare boron doped carbon (CBx) material with some substitutional boron atoms homogeneously distributed in the highly graphitic structure. The chemistry involves a mesophase boron-doped pitch (B-Pitch) prepared by mixing a borane reagent (i.e., dichlorophenylacetylborane) with petroleum pitch at 400°C. The resulting mesophase B-Pitch was further diluted with the starting pitch to adjust its softening temperature and melt viscosity, they are essential during the preparation of C/C composites. A resulting B-Pitch/Pitch blended precursor with 3.3 mol% B content and a softening temperature of 300°C was directly converted to CBx CBx CBx CBx B2O3 surface layer to slow down the oxygen diffusion into the matrix and stability. CBx) CBx at 2300°C under argon atmosphere, showing a char yield of 81%. The presence of a small percentage of B atoms i.. Read More»
  

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