Metastable Liquid Properties and Surface Flow Patterns of Ultrahigh Temperature Alloys Explored in Outer Space
© 2024 Wiley‐VCH GmbH..
The metastable liquid properties and chemical bonds beyond 2000 K remain a huge challenge for ground-based research on liquid materials chemistry. We show the strong undercooling capability, metastable liquid properties and surface wave patterns of refractory Nb-Si and Zr-V binary alloys explored in space environment. The floating droplet of Nb82.7Si17.3 eutectic alloy superheated up to 2338 K exhibited an extreme undercooling of 437 K, approaching the 0.2TE threshold for homogeneous nucleation of liquid-solid reaction. The microgravity state endowed alloy droplets with nearly perfect sphericity and thus ensured the high accuracy to determine metastable undercooled liquid properties. A special kind of swirling flow was induced for liquid alloy owing to Marangoni convection, which resulted in the spiral microstructures on Zr64V36 alloy surface during liquid-solid phase transition. The coupled impacts of surface nucleation and surface flow brought in a novel olivary shape for these binary alloys. Furthermore, the chemical bonds and atomic structures of high temperature liquids were revealed to understand the liquid properties in outer space circumstances.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:63 |
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| Enthalten in: |
Angewandte Chemie (International ed. in English) - 63(2024), 15 vom: 08. Apr., Seite e202400312 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Wang, Haipeng [VerfasserIn] |
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| Links: |
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| Themen: |
Alloys |
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| Anmerkungen: |
Date Revised 01.04.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/anie.202400312 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM367957094 |
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| 520 | |a The metastable liquid properties and chemical bonds beyond 2000 K remain a huge challenge for ground-based research on liquid materials chemistry. We show the strong undercooling capability, metastable liquid properties and surface wave patterns of refractory Nb-Si and Zr-V binary alloys explored in space environment. The floating droplet of Nb82.7Si17.3 eutectic alloy superheated up to 2338 K exhibited an extreme undercooling of 437 K, approaching the 0.2TE threshold for homogeneous nucleation of liquid-solid reaction. The microgravity state endowed alloy droplets with nearly perfect sphericity and thus ensured the high accuracy to determine metastable undercooled liquid properties. A special kind of swirling flow was induced for liquid alloy owing to Marangoni convection, which resulted in the spiral microstructures on Zr64V36 alloy surface during liquid-solid phase transition. The coupled impacts of surface nucleation and surface flow brought in a novel olivary shape for these binary alloys. Furthermore, the chemical bonds and atomic structures of high temperature liquids were revealed to understand the liquid properties in outer space circumstances | ||
| 650 | 4 | |a Journal Article | |
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| 700 | 1 | |a Hu, Liang |e verfasserin |4 aut | |
| 700 | 1 | |a Xie, Wenjun |e verfasserin |4 aut | |
| 700 | 1 | |a Chang, Jian |e verfasserin |4 aut | |
| 700 | 1 | |a Zheng, Chenhui |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Mingxing |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Qing |e verfasserin |4 aut | |
| 700 | 1 | |a Liao, Hui |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Dingnan |e verfasserin |4 aut | |
| 700 | 1 | |a Wei, Bingbo |e verfasserin |4 aut | |
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