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高熵玻璃

High entropy glass

  • 摘要: 熵代表了体系的混乱程度。高熵材料中的熵来自于形成固溶体的构型熵,而高熵实际反映了材料中元素种类多、混合比例接近的特点。在结构无序的传统玻璃中增加复杂成分的修饰,就形成了高熵玻璃,同时也引发了玻璃结构与性能的变化。高熵玻璃的出现打破了传统单个主元素的设计理念,灵活的元素置换极大地拓宽了材料的创新空间。经历 20年的发展,不仅发现了大量高熵玻璃材料,还出现了高熵引起的新结构和新现象,催生了利用熵来调控玻璃性能的新方法。文章将从几个典型案例出发,介绍高熵玻璃在材料设计、结构特征、动力学现象、性能调控等方面取得的进展,并给出高熵金属玻璃可能存在的发展机会。

     

    Abstract: Entropy represents the degree of chaos in a system, and in high-entropy materials it originates from the configuration entropy when a solid solution is formed. Highentropy actually signifies the presence of many elements with a roughly even composition. Adding complex components to traditional structurally disordered glass creates a high-entropy glass, which leads to changes in its structure and properties. The emergence of high-entropy glass has transcended the traditional single element design concept, and the flexibility of element replacement has greatly broadened the scope of material innovation. After 20 years of development, not have only a large number of high-entropy glass materials been discovered, but also new structures and new phenomena have emerged, giving birth to new methods of using entropy to control the properties of glass. Starting from several typical cases, this paper reviews the progress in the development of high-entropy glass with regard to material design, structural characteristics, dynamic phenomena, performance regulation, etc., and describes the opportunities for high-entropy metallic glass.

     

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