| 铝合金直接氧化合成Al／Al2O3研究现状 |
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| 引用本文： | 周正.铝合金直接氧化合成Al／Al2O3研究现状[J].重庆大学学报(自然科学版),2002,25(6):139-142. |
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| 作者姓名： | 周正 |
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| 作者单位： | 重庆大学,材料科学与工程学院,重庆,400044 |
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| 摘 要： | 评述了Al-Mg-Si合金直接氧化合成Al/Al2O3的工艺、组织结构、性能，认为其中问题主要为：熔体表面Al/Al2O3氧化生长的不均匀性及Al/Al2O3复合材料组织中的孔隙给其在结构方面应用带来了限制。归纳了机制研究的显微通道假说、Mg作用模型、Si作用模型及诱发机制，指出了其中有待重视的几方面问题：氧在Al熔体中的扩散和传递过程；熔体表氧化物MgO和MgAl2O4的作用；Al-Mg-Si合金氧化组织中的固－气反应特征；Al-Mg-Si合金中Si的SiO2诱发机制以及它与Mg作用机制之间的关联性。
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| 关 键 词： | 金属直接氧化 三氧化二铝基复合材料 氧化机理 |
| 文章编号： | 1000-582X(2002)06-0139-04 |
| 修稿时间： | 2002年2月25日 |
Current Status of DIMOX in Synthesizing Al/Al2O3 by Aluminum Alloy |
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| ZHOU Zheng.Current Status of DIMOX in Synthesizing Al/Al2O3 by Aluminum Alloy[J].Journal of Chongqing University(Natural Science Edition),2002,25(6):139-142. |
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| Authors: | ZHOU Zheng |
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| Abstract: | The processes, microstructures, properties and mechanisms of DIMOX in synthesizing Al/Al 2O 3 by Al-Mg-Si alloy are reviewed and their problems are considered mainly as following:non_homogeneous oxidation growth of Al/Al 2O 3 at the surface of melts and the porosity of Al/Al 2O 3 limites structural application of Al/Al 2O 3 composite. The mechanisms and models of microchannel,magnesium action,silicon action,and induction are outlined. Several problems which need to be noticed are pointed out,which are diffusion and transfer of oxygen in aluminium melts;the role of MgO and MgAl 2O 4 at outer layer;the reaction feature of solid_gas in the oxidation microstructures of Al_Mg_Si alloy;SiO 2 induction mechanism of silicon and its correlation with the mechanism of magnesium action in Al_Mg_Si alloy. |
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| Keywords: | directed metal oxidation alumina matrix composite oxidation mechanism |
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