| Al-TiO2-B系XD合成铝基复合材料的力学性能 |
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| 引用本文： | 朱和国,王恒志,孙强金,吴申庆.Al-TiO2-B系XD合成铝基复合材料的力学性能[J].材料科学与工程学报,2005,23(1):8-11. |
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| 作者姓名： | 朱和国 王恒志 孙强金 吴申庆 |
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| 作者单位： | 南京理工大学材料科学与工程系,江苏,南京,210094;东南大学材料科学与工程系,江苏,南京,210096 |
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| 摘 要： | 本文主要讨论了Al-TiO2-B系XD合成铝基复合材料的力学性能及其增强机理.研究结果表明:当B/TiO2摩尔比从0增加到2时,棒状物Al3 Ti增强相逐渐减少直至消失,Al2O3颗粒分布的均匀性提高,TiB2粒状弥散分布在合金基体中,材料的抗拉强度明显增强,由224.5MPa上升到354.5MPa,延伸率也由3.2%增加到5.6%.Al2O3和TiB2主要以奥罗万机制强化基体,而Al3 Ti则以位错塞积强化基体.
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| 关 键 词： | 复合材料 力学性能 摩尔比 抗拉强度 |
| 文章编号： | 1004-793X(2005)01-0008-04 |
| 修稿时间： | 2004年3月28日 |
Mechanical Properties of Composites Fabricated by XD Method in Al-TiO2-B System |
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| ZHU He-guo,WANG Hen-zhi,SUN Qiang-jin,WU Shen-qing.Mechanical Properties of Composites Fabricated by XD Method in Al-TiO2-B System[J].Journal of Materials Science and Engineering,2005,23(1):8-11. |
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| Authors: | ZHU He-guo WANG Hen-zhi SUN Qiang-jin WU Shen-qing |
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| Affiliation: | ZHU He-guo1,WANG Hen-zhi1,SUN Qiang-jin1,WU Shen-qing2 |
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| Abstract: | The mechanical properties and strengthing mechanism of the composites fabricated by XD(Exothermic Dispersion) method in Al-TiO_2-B system were studied. It has been found that the amount of Al_3Ti phase decreased and finally disappeared, and that the ultimate strength and elongation rate of the composites increased from 224.5MPa to 354.5MPa and from 3.2% to 5.6% respectively with growth of mole rates of B/TiO_2 from 0 to 2. At same time, the distribution of the particulates Al_2O_3 in matrix was also improved. The strengthening mechanism of the particulates TiB_2 and Al_2O_3 was inorowan mode but the Al_3Ti was in dislocation plug. |
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| Keywords: | composites mechanical properties mole ratio ultimate strength |
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