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| INFLUENCE OF Sr AND Sb ON SOLIDIFICATION OF Al-Si ALLOYS |
| by WANG Yucong; HUANG Liangyu; ZHAI Chunquan; DING Wenjiang (Shanghai Jiaotong University) (Manuscript received 4 November; 1985; revised manuscript; 3 May; 1986) |
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Cite this article:
by WANG Yucong; HUANG Liangyu; ZHAI Chunquan; DING Wenjiang (Shanghai Jiaotong University) (Manuscript received 4 November; 1985; revised manuscript; 3 May; 1986). INFLUENCE OF Sr AND Sb ON SOLIDIFICATION OF Al-Si ALLOYS. Acta Metall Sin, 1987, 23(6): 498-502.
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Abstract The influence of Sr and Sb on the solidification process of Al-Si alloys. was investigated by differential thermal analysis(DTA). The contact angles between the melt and silicon substrates were measured, and the interfacial energies were calculated. It was obtained that Sr and Sb in the melt raised the Al-Si eutectic nucleation temperature and retarded the eutectic crystallization. Sr and Sb in the melt had no thermodynamic tendeney to absorb on silieon crystals, which was contrary to the traditional point of view. But Sr and Sb might accumulate on silicon crystals and affect the growth of Al-Si eutectics because the partition coefficients were less than 1.
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Received: 18 June 1987
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