Recent progresses on designing and manufacturing of bulk refractory alloys with high performances based on controlling interfaces
Recent progresses on designing and manufacturing of bulk refractory alloys with high performances based on controlling interfaces
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基于界面控制的高性能大块耐火合金设计与制造研究进展
DOI：
10.1016/j.jmst.2020.02.046
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发表时间：
2020
影响因子：
10.9
通讯作者：
Y. Xiong
中科院分区：
文献类型：
--
作者：
T. Zhang;H.W. Deng;Z.M. Xie;R. Liu;J.F. Yang;C.S. Liu;X.P. Wang;Q.F. Fang;Y. Xiong
钨、钼等难熔合金具有高强度、导热/导电性、低热膨胀系数和优良的抗蠕变性能，在核设施、航空航天关键部件和国防部件等领域有着广泛的应用前景。然而，严重的脆化限制了一些难熔合金的工程应用。大量的研究结果表明，耐火合金的性能与其物理/化学状态密切相关，如界面尺寸、界面类型、晶界(GB)的界面成分、相界(PBS)等界面特征。这些策略包括GB界面净化/强化、PB界面强化和PB/GB协同强化。详细介绍了GB界面控制、PB界面控制、多尺度界面协同控制等设计与制造策略。从界面的影响方面综述了复合材料的力学性能、导热性能、耐热负荷性能、热稳定性、抗辐照性能和抗氧化性能。此外，还讨论了这些界面与材料性能之间的关系。最后提出了耐火合金的未来发展方向和可能的新研究方向。
Refractory alloys such as tungsten and molybdenum based alloys with high strength, thermal/electrical conductivity, low coefficient of thermal expansion and excellent creep resistances are highly desirable for applications in nuclear facilities, critical components in aerospace and defense components. However, the serious embrittlement limits the engineering usability of some refractory alloys. A lot of research results indicate that the performances of refractory alloys are closely related to the physical/chemical status, such as the interface dimension, interface type, interface composition of their grain boundaries (GBs), phase boundaries (PBs) and other interface features.This paper reviewed the recent progress of simulations and experiments on interface design strategies that achieve high performance refractory alloys. These strategies include GB interface purifying/strengthening, PB interface strengthening and PB/GB synergistic strengthening. Great details are provided on the design/fabrication strategy such as GB interface controlling, PB interface controlling and synergistic control of multi-scaled interfaces. The corresponding performances such as the mechanical property, thermal conductivity, thermal load resistance, thermal stability, irradiation resistance, and oxidation resistance are reviewed in the aspect to the effect of interfaces. In addition, the relationships between these interfaces and material properties are discussed. Finally, future developments and potential new research directions for refractory alloys are proposed.