快速压致凝固法制备块体亚稳材料的研究进展  

Progress in Preparation of Bulk Metastable Materials by Rapid Compression-Induced Solidification

作　　者：刘秀茹[1] 王明友[1] 张豆豆[1] 张晨然[1] 何竹[1] 陈丽英[1] 沈如[2] 洪时明[1] 

机构地区：[1]西南交通大学物理科学与技术学院、材料先进技术教育部重点实验室,四川成都610031 [2]西南交通大学分析测试中心,四川成都610031

出　　处：《高压物理学报》2014年第4期385-393,共9页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(11004163,10774123);中央高校基础科研业务费(SWJTU12CX083,2682014ZT31)

摘　　要：综述了快速增压使熔体凝固以获取非晶等亚稳相的方法和研究进展。介绍了自行研制的快速增压装置,展示了制备单质硫的大块非晶材料、单质硒的块体密实纳米材料、两种镧系基合金玻璃的块体材料,以及聚对苯二甲酸乙二醇酯(PET)、聚醚醚酮(PEEK)、等规聚丙烯(iPP)大块高分子亚稳材料的实验结果,证明了快速压致凝固法是制备块体亚稳材料的一种普遍可行的方法。最近的实验结果表明:快速压致凝固法获得的块体亚稳材料尺寸不受热传导率的限制;在快速压致凝固过程中,存在形成亚稳相的临界压力和临界增压速率两个限制条件。The method of preparing metastable materials（e.g.amorphous materials）by rapid compression-induced solidification and related research progress are reviewed in this paper.The authors prepared successfully bulk amorphous polymer PET（ethylene terephthalate）,amorphous polymer PEEK（polyetheretherketone）,mesomorphic phase of polymer iPP（isotactic polypropylene）,amorphous sulfur,nanophase selenium,and two metallic glass La68Al10Cu20Co2 and Nd60Cu20Ni10Al10using a rapid compression apparatus.These results indicate that the rapid compression is an effective method to prepare bulk metastable materials of many substances.It has been clearly demonstrated by recent experimental results that the size of metastable materials prepared by this method is not restricted by thermal conductivity,and furthermore it has been found that there exist a critical pressure and a critical compression rate of obtaining metastable phase during the rapid compression-induced solidification.

关 键 词：压致凝固 快速增压 大块非晶材料 临界增压速率 

分 类 号：O521.3[理学—高压高温物理] O521.2[理学—物理]