Pressure-jump induced rapid solidification of melt: a method of preparing amorphous materials
Pressure-jump induced rapid solidification of melt: a method of preparing amorphous materials
复制标题
跳压诱导熔体快速凝固：一种制备非晶材料的方法
DOI：
10.1088/1361-648x/aab40b
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发表时间：
2018-03
期刊：
影响因子：
--
通讯作者：
邵春光
中科院分区：
文献类型：
--
作者：
Xiuru Liu;Ru Jia;Doudou Zhang;Chaosheng Yuan;邵春光
采用自行设计的跳压装置，研究了元素硫、聚醚酮、聚对苯二甲酸乙酯、La68Al10Cu20Co2和Nd60Cu20Ni10Al10合金等材料在快速压缩过程中的熔体凝固行为。实验结果清楚地表明，它们的熔体在快速压缩过程中可以凝固成非晶态。制备了直径为24 mm、高度为12 mm的块状非晶态PEEK，其尺寸超过了熔体淬火法得到的尺寸。在396 K左右的温度下，首次观察到非晶态硫向液态硫的异常放热转变。此外，非晶相的形成还存在玻璃化转变压力和临界压缩率。这种快速压缩方法不仅是一种制备大块非晶材料的新技术，而且由于在几毫秒或微秒内通过压力跳变固化的非晶材料有望具有新的性能，因此具有很大的吸引力。
By using a self-designed pressure-jump apparatus, we investigated the melt solidification behavior in rapid compression process for several kinds of materials, such as elementary sulfur, polymer polyether-ether-ketone (PEEK) and poly-ethylene-terephthalate, alloy La68Al10Cu20Co2 and Nd60Cu20Ni10Al10. Experimental results clearly show that their melts could be solidified to be amorphous states through the rapid compression process. Bulk amorphous PEEK with 24 mm in diameter and 12 mm in height was prepared, which exceeds the size obtained by melt quenching method. The bulk amorphous sulfur thus obtained exhibited extraordinarily high thermal stability, and an abnormal exothermic transition to liquid sulfur was observed at around 396 K for the first time. Furthermore, it is suggested that the glass transition pressure and critical compression rate exist to form the amorphous phase. This approach of rapid compression is very attractive not only because it is a new technique of make bulk amorphous materials, but also because novel properties are expected in the amorphous materials solidified by the pressure-jump within milliseconds or microseconds.
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影响因子：
4
作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
24.2
作者：
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通讯作者：
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影响因子：
3.4
作者：
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通讯作者：
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影响因子：
64.8
作者：
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通讯作者：
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