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超高温合金的超稳定液体特性和表面流动模式在外太空中探索

Haipeng Wang¹, Liang Hu¹, Wenjun Xie¹

¹Shaanxi Key Laboratory of Space Materials Science and Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, China.

Angewandte Chemie (International ed. in English)

|February 2, 2024

概括

太空研究使耐火合金的极度低温成为可能,揭示了新的特性和微观结构. 这项研究促进了对微重力中高温液体材料化学的理解.

科学领域:

材料科学材料科学材料科学
物理化学物理化学
太空科学太空科学

背景情况:

在地球上,研究极端温度 (超过2000 K) 的液体材料化学是具有挑战性的.
超稳定的液体特性和在高温下化学结合需要先进的研究环境.

研究的目的:

在太空中研究耐火Nb-Si和Zr-V二元合金的低冷却能力和转移稳定的液体特性.
在微重力条件下分析表面波形状和微结构演变.
揭示太空中高温液体的化学键和原子结构.

主要方法:

在太空环境中使用Nb-Si和Zr-V合金的浮滴进行实验.
实现过热到高温的合金极度低冷.
分析合金液滴球性,马兰戈尼对流和表面流动模式.
通过先进的分析来研究微观结构特征和化学键.

主要成果:

证明了强大的低冷能力,Nb-Si合金达到437K的低冷,接近同质核化值.
在微重力条件下观察到合金滴的近乎完美的球形性,使得准确的属性确定.
通过马兰戈尼对流引发的旋转流,导致Zr-V合金表面上螺旋式微观结构和新的橄树形状.
揭示了太空中高温液体的化学键和原子结构的洞察力.

结论:

太空探索为研究耐火合金的超稳定液体特性提供了独特的机会.
微重力和马兰戈尼对流显著影响合金固化和微观结构的形成.
这项研究提高了在极端条件下对液体材料化学的理解.

关键词:

合金合金的合金计算化学计算化学液体的特性是液体的特性.外层空间的外层空间.

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