PSEUDO-COUPLED ZONE AND NUCLEATION OF Ni-Sn ALLOY UNDER DEEP UNDERCOOLING

Acta Metall Sin

1995, Vol. 31

Issue (7): 304-308 DOI:

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PSEUDO-COUPLED ZONE AND NUCLEATION OF Ni-Sn ALLOY UNDER DEEP UNDERCOOLING

LI Shunpu;ZHAO Deqian;CHEN Xichen(Institute of phesics;Chinese Academy of Sciences;Beijing 100080)(Manuscript received 1994-08-25)

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LI Shunpu;ZHAO Deqian;CHEN Xichen(Institute of phesics;Chinese Academy of Sciences;Beijing 100080)(Manuscript received 1994-08-25). PSEUDO-COUPLED ZONE AND NUCLEATION OF Ni-Sn ALLOY UNDER DEEP UNDERCOOLING. Acta Metall Sin, 1995, 31(7): 304-308.

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Abstract

The deep undercooling of the Ni-Sn alloy was achieved by means of the cyclic overheating to high temperature and rapid quenching in a mixed inorganic sail flux,so the pseudo-coupled zone of the alloy was obtained.Under deep undercooling,the nucleations of eutectic phases are both in dependent and heterogeneous.although the Ni3Sn phase is easy to grow nuclei.The inherent impurities in Ni-Sn alloy are favourable to nucleation of α-Ni phase.Correspondent.LI(Shunpu,Institute of physics,Chinese Academy of Sciences,Beijing 100080)

Key words: :undercooling eutectic alloy pseudo-coupled zone nucleation

Received: 18 July 1995

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