| Investigation of Intermetallic Compound Formed from Rapid Solidification of Al- Ti-RE Alloy |
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| 作者姓名： | 杨明珊 王振飞 |
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| 作者单位： | CollegeofInformationEngineering,ZhengzhouUniversity,Zhengzhou450052,China |
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| 基金项目： | ProjectsupportedbyNationalAdvancedMaterialsCommitteeofChina ( 715 2 6 0 2 0 2 ) |
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| 摘 要： | Al-Ti alloy containing rare earth elements can produce fine, uniform dispersion intermetallic phasethrough rapid solidification (RS) technology. RS Al-Ti-RE alloy can be designed for applications at elevated-temperature since the intermetallic compound has good thermal stability. A transmission electron microscopy investigation shows the intermetallic phase has a diamond cubic structure (a=1.47736nm), with space group Fd3m. The chemical stoichiometry is Al20 Ti2La. The particle is formed from the melting directly, prior to other phases, and the nucleus is formed from icosahedrons composed with twenty tetrahedrons. Twin crystal structure plays an important role in the nucleation stage.
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| 关 键 词： | Al-Ti-RE 铝合金 快速凝固 金属间化合物 稀土 高温合金 |
Investigation of Intermetallic Compound Formed from Rapid Solidification of Al-Ti-RE Alloy |
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| Yang Mingshan,Wang Zhengfei.Investigation of Intermetallic Compound Formed from Rapid Solidification of Al- Ti-RE Alloy[J].Journal of Rare Earths,2004,22(2):311-314. |
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| Authors: | Yang Mingshan Wang Zhengfei |
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| Abstract: | Al-Ti alloy containing rare earth elements can produce fine,uniform dispersion intermetallic phase through rapid solidification(RS)technology.RS Al-Ti-RE alloy can be designed for applications at elevated-temperature since the intermetallic compound has good thermal stability.A transmission electron microscopy investigation shows the intermetallic phase has a diamond cubic structure(a=1.47736 nm),with space group Fd3m.The chemical stoichiometry is Al20Ti2La.The particle is formed from the melting directly,prior to other phases,and the nucleus is formed from icosahedrons composed with twenty tetrahedrons.Twin crystal structure plays an important role in the nucleation stage. |
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| Keywords: | metal materials rapid solidification intermetallic compound elevated-temperature alloy rare earths |
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