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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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TiB_2-B_4C陶瓷复合材料的微观组织和机械性能
, PP. 107-112
Keywords: TiB_2-B_4C复合材料,裂纹偏转,裂纹分叉
Abstract:
研究了TiB_2/B_4C复合材料的显微组织和力学性能,发现含有20-30wt-％B_4C的TiB_2材料,强度和硬度均有显著地提高,而原有较高的K_(IC)值保持不变。TiB_2-30wt-％B_4C抗弯强度达到782MPa,维氏硬度达到26.2GPa,断裂韧性为7.2MPam~(1/2);而单相TiB_2材料的强度、硬度和断裂韧性分别为450MPa,21GPa和7.0MPam~(1/2)。本文还对强化及裂纹扩展机理进行了探讨。
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