| 原位生成棒晶增强Ti-B-C复相陶瓷的研究 |
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| 引用本文： | 李世波,温广武,张宝生. 原位生成棒晶增强Ti-B-C复相陶瓷的研究[J]. 无机材料学报, 2001, 16(6): 1243-1249 |
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| 作者姓名： | 李世波 温广武 张宝生 |
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| 作者单位： | 1. 哈尔滨工业大学材料科学与工程学院 哈尔滨 150006; 2. 西北工业大学凝固技术国家重点实验室, 西安 710072 |
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| 摘 要： | Ｂ４Ｃ与Ｔｉ在１８００°Ｃ×３５ＭＰa×１ｈ的烧结条件下反应生成了TiB2 棒晶，棒晶长度在１０～３０μｍ，其长径比在２～８范围．原位生成的棒晶赋予了材料具有极高的力学性能，材料的弯曲强度和断裂韧性分别为 ６８０ＭＰａ和 １２ＭＰａ·ｍ１／２．通过 Ｘ射线衍射检测了材料的物相组成，利用扫描电镜及透射电镜观察了材料的显微结构．最后讨论了温度及金属Ｔｉ含量对棒晶ＴiＢ2的生成及发育的影响．
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| 关 键 词： | 原位生成 TiB2棒晶 显微结构 棒晶发育 影响因素 |
| 文章编号： | 1000-324(2001)06-1243-07 |
| 收稿时间： | 2000-12-25 |
| 修稿时间： | 2000-12-25 |
Study of In Situ Formation of Rod-Like Phases Reinforced Ti-B-C Ceramics |
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| LI Shi-Bo,WEN Guang-Wu,ZHANG Bao-Sheng. Study of In Situ Formation of Rod-Like Phases Reinforced Ti-B-C Ceramics[J]. Journal of Inorganic Materials, 2001, 16(6): 1243-1249 |
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| Authors: | LI Shi-Bo WEN Guang-Wu ZHANG Bao-Sheng |
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| Affiliation: | 1. SChool of Material Science and Engineering; Harbin Institution of Technology; Harbin 150006; China; 2. State Key Laboratory of Solidification Processing; Northwestern Polytechnical University; Xi an 710072 |
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| Abstract: | The rod-like phases TiB2 were formed by the reaction of B4C and Ti under 1800℃×35MPa×1h sintering condition, the length of particle TiB2 was 10～30μm, some over 40μm; and the aspect ratio was 2～8. These rod-like phases endowed the composites with high mechanical properties. The bending strength and the fracture toughness of the composites were 680MPa and 12MPa·m1/2, respectively. The phases were examined by XRD; the microstructure of the composites was observed by SEM and TEM. The influence of sintering temperature and Ti content on the growth and development of rod-like phases TiB2 was discussed. |
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| Keywords: | in situ formation rod-like phase TiB2 microstructure phase growth infiuence factors |
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