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Decoupled growth mechanism of Fe_(40)Ni_(40)P_(14)B_6 eutectic alloy

机译：Fe_（40）Ni_（40）P_（14）B_6共晶合金的解耦生长机理

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摘要

Decoupled growth often occurs in the nonfacetted-facetted eutectic systems. And it is generally considered that the nonfacetted solid solution acts as the leading phase in the decoupled growth. In this work, Fe_(40)Ni_(40)P_(14)B_6 eutectic alloys were systematically studied via solidification of undercooled melts and crystallization of amorphous alloys. Upon solidification of melts subjected to different undercoolings, as the undercooling increases, the growth mechanism develops from cooperative growth to decoupled growth. Upon crystallization of amorphous alloys, the partially crystallized sample consists only of strongly faulted intermetallic (Fe,Ni)_3(P,B) with chemical composition deviating from stoichiometry. Formation of supersaturated solid solution γ(Fe, Ni) in the solidification and supersaturated intermetallic (Fe,Ni)_3(P,B) in the amorphous crystallization indicates that decoupled growth results from solute trapping and disorder trapping in rapid growth of solid solution and intermetallic, respectively. Further application of rapidly quenched experiments and theoretical analysis declare that the decoupled growth results from a competition between the growth of γ(Fe, Ni) and (Fe,Ni)_3(P,B), which are controlled by solute trapping and disorder trapping, respectively.
机译：解耦生长通常发生在非多面共晶系统中。通常认为非分面固溶体是解耦增长中的主导阶段。在这项工作中，通过过冷熔体的凝固和非晶态合金的结晶化，系统地研究了Fe_（40）Ni_（40）P_（14）B_6共晶合金。在经受不同的过冷度的熔体凝固后，随着过冷度的增加，生长机理从协同生长发展为解耦生长。在非晶态合金晶化后，部分晶化的样品仅由化学性质偏离化学计量的强断层金属间化合物（Fe，Ni）_3（P，B）组成。凝固过程中过饱和固溶体γ（Fe，Ni）的形成和非晶态结晶中过饱和金属间化合物（Fe，Ni）_3（P，B）的形成表明在固溶体快速生长时溶质俘获和无序俘获导致解耦生长金属间化合物。快速淬火实验和理论分析的进一步应用表明，解耦生长是由溶质俘获和无序俘获控制的γ（Fe，Ni）和（Fe，Ni）_3（P，B）的增长竞争所致。 ， 分别。

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  • 来源
    《Journal of Materials Research》 |2013年第20期|2861-2873|共13页
  • 作者

    Bin Gu; Feng Liu; Xiaoqing Dong; Ke Zhang; Kang Wang;

  • 作者单位

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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