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Non-catalytic nucleation coating for undercooled Cu50Ni50 melt |
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| Authors: | GUO Xuefeng LIU Feng LIU Yongchang YANG Gencang XING Jiandong |
| Institution: | 1 . Slate Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China; 2. School of Mechanical Engineering, Xi' an Jiaotong University, Xi'an 710049, China,Slate Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China,Slate Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China,Slate Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China,School of Mechanical Engineering, Xi' an Jiaotong University, Xi'an 710049, China |
| Abstract: | A non-catalytic nucleation coating (B-F3) was prepared by the high temperature curing process of the sol-gel glass film based on the viscous flow mechanism of the coating. X-ray diffraction technology was adopted to study the crystallization behavior of the coating as a function of treating temperature. It was evident that no crystallization phenomenon happened on the coating which kept stable after the heat treatment of 60 min at 1773 K. The purified melt of Cu50Ni50 was selected to evaluate the effectiveness of undercooling heredity of the coating in the undercooling experiments. The maximum undercooling of the melt solidified in the coated mold could reach 236 K. Based on the solidified microstructural evolution at different undercoolings, a single crystal of the alloy Cu50Ni50 was achieved with no aid of the selection process of the crystal in the mold with the B-F3 coating by means of undercooling technology. |
| Keywords: | undercooled Cu50Ni50 melt non-catalytic nucleation coating single crystal |
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