| Cr在Ti-Al-Cr合金抗高温氧化过程中的作用研究 |
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| 引用本文： | 周春根,杨颖,宫声凯,徐惠彬.Cr在Ti-Al-Cr合金抗高温氧化过程中的作用研究[J].航空学报,2001,22(1):73-77. |
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| 作者姓名： | 周春根 杨颖 宫声凯 徐惠彬 |
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| 作者单位： | 北京航空航天大学 材料科学与工程系, |
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| 摘 要： | 研究了 Ti-50 Al,Ti-50 Al-1 5Cr,Ti-4 5Al-1 5Cr和 Ti-67Al-8Cr(原子百分数 )合金在 90 0～ 1 0 0 0℃下的高温氧化性能。结果表明 :Ti-50 Al-1 5Cr,Ti-4 5Al-1 5Cr和 Ti-67Al-8Cr均表现出优良的抗氧化性能,氧化后表面主要是 α-Al2O3及少量的 TiO2 组成。Ti-50 Al-1 5Cr,Ti-67Al-8Cr和 Ti-4 5Al-1 5Cr合金良好的抗高温氧化性能归于 Cr在合金抗氧化过程中起到了吸氧效应的作用。另外发现对于 Ti-50 Al-1 5Cr和 Ti-67Al-8Cr均发生了 950℃时的氧化增重比 1 0 0 0℃时的氧化增重大,这是由于 Cr的加入使 Ti的活性降低的缘故。
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| 关 键 词： | Ti-Al-Cr 高温氧化 Cr的作用 TiAl |
| 文章编号： | 1000-6893(2001)01-0073-05 |
| 修稿时间： | 1999年10月20 |
MECHANISM OF Cr EFFECT FOR IMPROVEMENT OF OXIDATION RESISTANCE OF Ti-Al-Cr ALLOYS |
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| ZHOU Chun-gen,YANG Ying,GONG Shen-kai,XU Hui-bin.MECHANISM OF Cr EFFECT FOR IMPROVEMENT OF OXIDATION RESISTANCE OF Ti-Al-Cr ALLOYS[J].Acta Aeronautica et Astronautica Sinica,2001,22(1):73-77. |
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| Authors: | ZHOU Chun-gen YANG Ying GONG Shen-kai XU Hui-bin |
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| Affiliation: | Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | The high temperature oxidized behavior of Ti-50Al, Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr(at.%) alloy at 900～1000℃ was studied. The results showed that Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr have good oxidation resistance. The weight gain at 950℃ for Ti-50Al-15Cr and Ti-67Al-8Cr is more than that at 1000℃, which is due to a decrease in titanium activity in Ti-Al-Cr alloys when Cr is added into Ti-Al alloys. Oxides formed on the surface of Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr after oxidation consist of α-Al2O3 and tiny TiO2. The formation of Al2O3 is attributed to the role of Cr. Effect of Cr can be described by ‘gettering effect’. |
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| Keywords: | Ti Al Cr high temperature oxidation effect of Cr TiAl |
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