中国物理B ›› 2017, Vol. 26 ›› Issue (1): 18102-018102.doi: 10.1088/1674-1056/26/1/018102

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

High thermal stability of diamond-cBN-B4C-Si composites

Hong-Sheng Jia(贾洪声), Pin-Wen Zhu(朱品文), Hao Ye(叶灏), Bin Zuo(左斌), Yuan-Long E(鄂元龙), Shi-Chong Xu(徐仕翀), Ji Li(李季), Hai-Bo Li(李海波), Xiao-Peng Jia(贾晓鹏), Hong-An Ma(马红安)   

  1. 1. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping 136000, China;
    2. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • 收稿日期:2016-08-22 修回日期:2016-09-30 出版日期:2017-01-05 发布日期:2017-01-05
  • 通讯作者: Pin-Wen Zhu, Hai-Bo Li E-mail:zhupw@jlu.edu.cn;lihaibo@jlnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51301075) and the Project of Development and Reform Commission of Jilin Province, China (Grant No. 2014Y136).

High thermal stability of diamond-cBN-B4C-Si composites

Hong-Sheng Jia(贾洪声)1, Pin-Wen Zhu(朱品文)2, Hao Ye(叶灏)1, Bin Zuo(左斌)1, Yuan-Long E(鄂元龙)1, Shi-Chong Xu(徐仕翀)1, Ji Li(李季)1, Hai-Bo Li(李海波)1, Xiao-Peng Jia(贾晓鹏)2, Hong-An Ma(马红安)2   

  1. 1. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping 136000, China;
    2. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2016-08-22 Revised:2016-09-30 Online:2017-01-05 Published:2017-01-05
  • Contact: Pin-Wen Zhu, Hai-Bo Li E-mail:zhupw@jlu.edu.cn;lihaibo@jlnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51301075) and the Project of Development and Reform Commission of Jilin Province, China (Grant No. 2014Y136).

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摘要： Improving the thermal stability of diamond and other superhard materials has great significance in various applications. Here, we report the synthesis and characterization of bulk diamond-cBN-B4C-Si composites sintered at high pressure and high temperature (HPHT, 5.2 GPa, 1620-1680 K for 3-5 min). The results show that the diamond, cBN, B4C, BxSiC, SiO2 and amorphous carbon or a little surplus Si are present in the sintered samples. The onset oxidation temperature of 1673 K in the as-synthesized sample is much higher than that of diamond, cBN, and B4C. The high thermal stability is ascribed to the covalent bonds of B-C, C-N, and the solid-solution of BxSiC formed during the sintering process. The results obtained in this work may be useful in preparing superhard materials with high thermal stability.

关键词: high pressure and high temperature, diamond-cBN-B4C-Si, composites, high thermal stability

Abstract: Improving the thermal stability of diamond and other superhard materials has great significance in various applications. Here, we report the synthesis and characterization of bulk diamond-cBN-B4C-Si composites sintered at high pressure and high temperature (HPHT, 5.2 GPa, 1620-1680 K for 3-5 min). The results show that the diamond, cBN, B4C, BxSiC, SiO2 and amorphous carbon or a little surplus Si are present in the sintered samples. The onset oxidation temperature of 1673 K in the as-synthesized sample is much higher than that of diamond, cBN, and B4C. The high thermal stability is ascribed to the covalent bonds of B-C, C-N, and the solid-solution of BxSiC formed during the sintering process. The results obtained in this work may be useful in preparing superhard materials with high thermal stability.

Key words: high pressure and high temperature, diamond-cBN-B4C-Si, composites, high thermal stability

中图分类号:  (Diamond/nanocarbon composites)

  • 81.05.uj
81.20.Ev (Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation) 81.70.Pg (Thermal analysis, differential thermal analysis (DTA), differential thermogravimetric analysis)