| Phase selection in highly undercooled Fe-B eutectic alloy melts |
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| 作者姓名： | 杨长林 饧根仓 卢一平 陈豫增 周尧和 |
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| 作者单位： | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi＇an 710072, China |
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| 摘 要： |
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| 关 键 词： | Fe-B合金 共晶合金 过冷度 相位选择 亚稳相 |
| 收稿时间： | 2005-05-23 |
| 修稿时间： | 2005-11-04 |
Phase selection in highly undercooled Fe-B eutectic alloy melts |
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| Chang-lin YANG, Gen-cang YANG, Yi-ping LU, Yu-zeng CHEN,Yao-he ZHOU.Phase selection in highly undercooled Fe-B eutectic alloy melts[J].Transactions of Nonferrous Metals Society of China,2006,16(1):39-43. |
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| Authors: | Chang-lin YANG Gen-cang YANG Yi-ping LU Yu-zeng CHEN Yao-he ZHOU |
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| Affiliation: | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China |
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| Abstract: | The high undercooling technique by molten glass slag purification and cyclical superheating in Ar atmosphere was applied to bulk Fe-B alloy melts. A hypercooling was achieved which suppressed the formation of stable phase and consequently promoted the nucleation of metastable phase. Fe-17%B and Fe-20%B alloys were investigated, respectively. TEM and X-ray powder diffraction analyses verify the formation of metastable phase in the highly tmdercooled Fe-B alloy melts. Besides, the critical nucleation work of Fe2B and Fe3B phases was calculated to predict phase selection in the undercooled melts. The results show that the metastable phase formation is a function of the undercooling achieved prior to nucleation. And the amount of undercooling is an important factor in determining microstructural development by controlling phase selection in the undercooled melts. |
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| Keywords: | Fe-B eutectic alloy metastable phase phase selection hypercooling |
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