| 反应自生Al2O3-Al3Ti-Al 复合材料的抗弯曲性能 |
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| 引用本文： | 彭华新,崔岩,耿林,孙祖庆,王德尊,姚忠凯.反应自生Al2O3-Al3Ti-Al 复合材料的抗弯曲性能[J].复合材料学报,1998,15(4):48-52. |
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| 作者姓名： | 彭华新 崔岩 耿林 孙祖庆 王德尊 姚忠凯 |
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| 作者单位： | 1.北京科技大学材料科学与工程学院, 北京 100083; |
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| 基金项目： | 国家自然科学基金,中国博士后科学基金,中科院上硅所开放室基金 |
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| 摘 要： | 将压力铸造(Squeeze-Casting) 与燃烧合成(Combustion-Synthesis) 相结合, 利用TiO2与Al 之间的反应, 成功地制备了金属相Al 含量不同的Al2O3-Al3Ti-Al 原位复合材料系列。运用三点弯曲方法测试了复合材料的抗弯曲强度和弹性模量。结果表明: 复合材料具有较高的弯曲强度(410～ 490M Pa) 和弹性模量(156～ 216GPa) , 随着金属相Al 含量的增加, 弯曲强度开始有所升高,当A l 体积百分数超过40% 后便明显下降。而弹性模量始终呈降低趋势, 复合材料的高强度源于反应生成细小的Al2O3颗粒及Al3Ti 相的增强作用。
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| 关 键 词： | 反应自生 弯曲强度 Al2O3-Al3Ti-Al 复合材料 |
| 收稿时间： | 1997-12-03 |
| 修稿时间： | 1998-03-28 |
FLEXURAL STRENGTH OF IN SITU REACTION PROCESSED Al2O3-Al3Ti-Al COMPOSITES |
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| Peng Hua-xin,Cui Yan,Geng Lin,Sun Zu-qing,Wang De-zun,Yao Zhong-kai.FLEXURAL STRENGTH OF IN SITU REACTION PROCESSED Al2O3-Al3Ti-Al COMPOSITES[J].Acta Materiae Compositae Sinica,1998,15(4):48-52. |
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| Authors: | Peng Hua-xin Cui Yan Geng Lin Sun Zu-qing Wang De-zun Yao Zhong-kai |
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| Affiliation: | 1.Beijing University of Science and Technology, Beijing 100083;2.Beijing Institute of Aeronautical Materials, Beijing 100095;3.Harbin Institute of Technology, Harbin 150001 |
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| Abstract: | Fully dense Al2O3-Al3Ti-Al composites were in situ reaction processed by combining squeeze casting technique with combustion synthesis utilizing the reaction between TiO2 and pure Al. The in situ reaction formed spherical Al2O3 particles with a size of 0.1μm to 1μm are uniformly distributed in the matrix. The composites possess high flexural strength (410～490MPa) and elastic modulus (156～216GPa). With increasing content of Al in the composite, the bending strength begins to increase slightly and then decreases when the volume fraction of Al exceeds 40%. The elastic modulus of the composites decreases with increasing content of Al. The high flexural strength of the in situ composites is mainly attributed to the dispersion strengthening of fine Al2O3 particles and Al3Ti phase. |
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| Keywords: | Al2O3-Al3Ti-Al |
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