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《Journal of Synthetic Crystals》 2009-S1
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Research on Preparation Process of Boron Carbide Ceramics Sintered by Spark Plasma Sintering

CHEN Gang,ZHANG Song,WANG Chuan-bin,SHEN Qiang,ZHANG Lian-meng(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China)  
Boron carbide ceramics were synthesized and desificated in one step by spark plasma sintering(SPS) technique using boron and graphite powders as raw materials.The impact of sintering temperature,sintering pressure,holding time and heating program,on sintering performance of boron carbide ceramics was studied.The results indicated that the starting temperature of synthesis was at 1100 ℃;higher temperature and pressure,appropriate holding time and heating-up rate,as well as two holding steps were beneficial to densification of boron carbide ceramics.The suitable SPS process conditions were optimized as: sintering temperature of 1800 ℃,pressure of 40 MPa,holding time of 6 min,heating-up rate of 100 ℃/min,and two holding steps,on which boron carbide ceramics of higher density were obtained.
【Fund】: 国家自然科学基金(No.50772082)
【CateGory Index】: TQ174
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