赵齐笑,夏梦佳,刘晓璇,刘丛,李强

• 1:新疆大学物理科学与技术学院

摘要(Abstract)：

通过J-quenching和melt-spinning技术制备Fe_(40)Ni_(40)P_(14)B_6块体非晶态合金和非晶薄带样品。利用差示扫描量热法对这两个不同制备冷速下获得的非晶态合金样品的热力学行为以及晶化过程的非等温晶化动力学行为进行研究。结果表明:两种样品的玻璃转变温度和初始晶化温度没有明显的差别,但非晶薄带总的晶化放热焓要大于块体非晶态合金的。随着制备冷速的降低,样品的表观激活能增加,两种制备技术获得的非晶态合金的局域Avrami指数(n)大部分处于1.5~2.5之间,表明晶化机制为受扩散控制的共晶型长大,且小尺寸晶粒长大的同时还伴有形核,形核率随时间减小。样品的n指数同样随着制备冷速的降低而减小,低制备冷速下获得的样品具有较高程度的短程有序。

关键词(KeyWords)： Fe40Ni40P14B6非晶态合金;制备冷速;表观激活能;非等温晶化动力学;局域Avrami指数

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51561028);; 新疆大学国家级大学生创新创业训练计划项目(201610755050)

作者(Author): 赵齐笑,夏梦佳,刘晓璇,刘丛,李强

DOI: 10.13289/j.issn.1009-6264.2017-0413

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