高熵氧化物纳米带的弹性、形态和熵转化

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2025-05-29 DOI:10.1126/science.adr5604

Hessam Shahbazi, Pardis Seraji, Husam Farraj, Taimin Yang, Allen Kim, Seyyedfaridoddin Fattahpour, Ilias Papailias, Matthew Diamond, Shahriar Namvar, Alireza Ahmadiparidari, Shuxi Wang, Zhenxian Liu, Shihui Feng, Khagesh Kumar, Muhtar Ahart, Jordi Cabana, Sara Kadkhodaei, Junlan Wang, Zhehao Huang, Russell J. Hemley, Amin Salehi-Khojin

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引用次数: 0

摘要

我们成功合成并表征了一种具有纳米带形态的一维高熵氧化物（1D-HEO）。这些1D-HEO纳米带在高温（至1000°C）、高压（至12千兆帕斯卡）和长期暴露于恶劣的酸或碱化学环境下均表现出高度的结构稳定性。此外，它们表现出显著的机械性能，具有优异的弹性模量，达到每立方米40兆焦耳。高压实验表明，在15千兆帕斯卡的条件下，d - heo纳米带从正交结构转变为立方结构，然后在30千兆帕斯卡以上形成完全无定形的heo，这是可恢复到环境条件下的。除了构型熵之外，这些变换还引入了额外的熵（结构无序）。这一发现提供了一种创造低维、弹性和高熵材料的方法。

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Resiliency, morphology, and entropic transformations in high-entropy oxide nanoribbons

We present the successful synthesis and characterization of a one-dimensional high-entropy oxide (1D-HEO) exhibiting nanoribbon morphology. These 1D-HEO nanoribbons exhibit high structural stability at elevated temperatures (to 1000°C), elevated pressures (to 12 gigapascals), and long exposure to harsh acid or base chemical environments. Moreover, they exhibit notable mechanical properties, with an excellent modulus of resilience reaching 40 megajoules per cubic meter. High-pressure experiments reveal an intriguing transformation of the 1D-HEO nanoribbons from orthorhombic to cubic structures at 15 gigapascals followed by the formation of fully amorphous HEOs above 30 gigapascals, which are recoverable to ambient conditions. These transformations introduce additional entropy (structural disorder) besides configurational entropy. This finding offers a way to create low-dimensional, resilient, and high-entropy materials.

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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