Uncovering the Wonders of Champion Metallic Glass

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9月27日2022年审查Skyla baily

关于玻璃形成能力（GFA），PD_42.5你_7.5Cu₃₀P₂₀(PNCP) is regarded as the best bulk metallic glass, although the atomic arrangements that result in its attributes are still unknown.

Researchers compared the atomic configurations of PNCP with other metallic glasses PNP and PCP to find which characteristic atomic configurations of PNCP lend it its excellent glass forming ability. Image Credit: Prof. Shinya Hosokawa from Kumamoto University

A recent analysis of the atomic configurations of PNCP and comparison with earlier alloys by a global team of researchers under the direction of Prof. Shinya Hosokawa ofKumamoto University, Japan, revealed its distinctive configurations and the source of its GFA. This could aid in the improvement of metallic glasses.

金属玻璃是一种突破性的物质，将金属的强度与玻璃的柔韧性混合在一起。这些是通过快速冷却液体金属或合金而产生的，使原子不会以熟悉的金属模式冻结，而是在类似于液体的随机图案中冻结。

玻璃还表现出这种不稳定的液体状图案，从而使该物质的名字命名。由于其出色的玻璃形成能力（GFA），PD_42.5你_7.5Cu₃₀P₂₀(PNCP) is regarded as the champion of metallic glasses.

该合金的性能明显优于其两种父合金PD₄₀你₄₀P₂₀(PNP), which displays a somewhat worse GFA, and Pd₄₀Cu₄₀P₂₀（PCP），显示出比PNCP明显差的GFA。但是，区分PNCP并使其成为优质金属玻璃的原子布置仍然是一个谜。

一群来自日本，德国，法国，匈牙利和英国的科学家最近发表了一篇论文，使我们更接近第596卷中的答案。Journal of Non-Crystalline Solids11月15日^th, 2022.

The study was made available online on August 25^th，2022年。他们成功检查了PNCP的原子结构，并将其与PNP和PCP的原子结构进行了比较，以发现可能有助于PNCP的出色GFA的独特构型。

尽管以前的研究试图制定可以预测金属眼镜GFA的规则，但尚未经过实验验证。我们的发现表明，这些规则可能不是正确的。此外，我们的研究阐明了必须采取的下一步，以了解其他金属眼镜的原子配置如何影响其GFA。

Shinya Hosokawa，云天大学纳米材料研究所教授欧洲杯足球竞彩

The atomic configurations of a PNCP sample with a 3 mm diameter were elucidated using a variety of observation techniques, including anomalous X-ray scattering, X-ray diffraction, and neutron diffraction. Reverse Monte Carlo modeling techniques were used to analyze these. The observations were then compared to those from PNP and PCP that were similar.

该研究发现了PNCP的原子构型与其父合金之间的明确变化。首先，与PNP（镍）和PCP（铜）中的二级金属相比，PNCP的镍和铜二级金属显示出更大的可变性。

In PNCP, copper and nickel were not distributed equally. Additionally, the team noticed that nickel and copper had more icosahedral configurations in PNCP. Last but not least, research using persistent homology (PH), a technique for calculating the topology of compounds, revealed that PNCP contained the largest copper PH rings of all palladium-based bulk metallic glasses.

从这些结果中，研究人员推断了PNCP的上级GFA是由于金属成分（由镍和铜制成）与有点共价部分（由钯和磷或PD-P组成的）的相互作用，这是存在于中的，这些部分存在于PNCP。

Our results can help others understand the origins of excellent glass-forming ability in many metallic glasses, not just PNCP. Further research can build upon ours and help develop better metallic glasses in the future.

Shinya Hosokawa，云天大学纳米材料研究所教授欧洲杯足球竞彩

金属眼镜坚固，柔软和耐腐蚀。结果，这些材料的利用具有巨大的潜力。欧洲杯足球竞彩这种类型的发展可以增加现代社会中金属眼镜的使用，并使意识到这些不寻常材料的希望更近。欧洲杯足球竞彩

Funding

日本科学促进学会（JSP）：变革性研究领域的补助金（a）“超订购结构科欧洲杯线上买球学”（第20H05878和21H05569号）
日本科学促进学会（JSP）：科学研究授予赠款（C）（第22K12662欧洲杯线上买球号）
Japan Science and Technology Agency (JST) CREST (No. JPMJCR1861)
Deutsche Forschungsgemeinschaft (DFG) Mercator Fellowship in FOR 2824
Royal Society–EPSRC Dorothy Hodgkin Research Fellowship

Journal Reference

Hosokawa，S。，et al.(2022) Relationship between atomic structure and excellent glass forming ability in Pd42.5Ni7.5Cu30P20 metallic glass.Journal of Non-Crystalline Solids.doi:10.1016/j.jnoncrysol.2022.121868.

来源：https://ewww.kumamoto-u.ac.jp/en/