| B4C－TiB2－W2B5复合材料研究 |
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| 引用本文： | 唐国宏,陈昌麟,张兴华. B4C－TiB2－W2B5复合材料研究[J]. 航空学报, 1994, 15(6): 761-764 |
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| 作者姓名： | 唐国宏 陈昌麟 张兴华 |
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| 作者单位： | 北京航空航天大学１０１教研室 |
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| 摘 要： | 通过热压和热等静压反应烧结,从相复合角度探索了改善碳化硼机械性能及发展新型碳化硼基超硬材料的可行性,并给出了最新研究结果。
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| 关 键 词： | 碳化硼 化学反应－烧结 机械性能 |
RESEARCH ON B4C-TiB2-W2B5 COMPOSITE |
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| Tang Guohong, Chen Changqi, Zhang Xinghua. RESEARCH ON B4C-TiB2-W2B5 COMPOSITE[J]. Acta Aeronautica et Astronautica Sinica, 1994, 15(6): 761-764 |
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| Authors: | Tang Guohong Chen Changqi Zhang Xinghua |
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| Affiliation: | Faculty 101, Beijing University of Aeronautics and Astronautics,Beijing,100083 |
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| Abstract: | The poor sinterability of B4C limits its widespread application because both high temperature and high pressure are required for a complete densification. Moreover,B4C suffers from a low strength and fracture toughness,but possesses a high potential use in hiqh temperature region because of its superb hardness and corrosion resistance. Hot press reaction sintering of B4C-Si-WC/TiC-Co mixtures results in B4C-TiB2-W2B5 composite with a high density and much improved mechanical properties. The iufluence of hot isostatic pressing(HIP)on the im-provement of mechanical properties is also investigated and related to the strengthening and toughening mechanisms. In comparison to single phase B4C ceramics,bending strength is im-proved to 1030MPa(HIP),K(IC) to 5. 6MP3·,hardness is comparable with HV=38GPa,and of practical importance, sintering temperature is lowered to 1700～1800℃. |
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| Keywords: | Boron carbides chemical reactions-sintering mechanical properties |
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