自支撑Ti/Al纳米多层膜激光诱发自蔓延行为*
安荣, 男, 1980年生, 讲师, 博士
收稿日期: 2013-12-17
修回日期: 2014-05-05
网络出版日期: 2014-08-25
基金资助
*国家自然科学基金项目51005055和中央高校基本科研业务费专项资金项目HIT.NSRIF.2015066资助
LASER-IGNITED SELF-PROPAGATING BEHAVIOR OF SELF-SUPPORTING NANO-SCALED Ti/Al MULTILAYER FILMS
Received date: 2013-12-17
Revised date: 2014-05-05
Online published: 2014-08-25
Supported by
Supported by National Natural Science Foundation of China (No.51005055) and Fundamental Research Funds for the Central Universities (No.HIT.NSRIF.2015066)
安荣 , 田艳红 , 孔令超 , 王春青 , 常帅 . 自支撑Ti/Al纳米多层膜激光诱发自蔓延行为*[J]. 金属学报, 2014 , 50(8) : 937 -943 . DOI: 10.11900/0412.1961.2013.00821
通过磁控溅射法并借助有机高分子牺牲层, 制备了具有不同调制结构的自支撑Ti/Al (调制比为1)纳米多层膜. 采用脉冲激光诱发了纳米多层膜的自蔓延反应, 确定了临界诱发能量密度. 利用高速摄影法表征了自蔓延速度, 采用SEM和TEM观察了纳米多层膜结构, 利用差热分析仪和XRD分析了反应过程及产物. 结果表明, 纳米多层膜激光诱发临界能量密度(6~17 J/cm2)高于烧蚀临界能量密度. 调制周期或周期数较小的纳米多层膜激光诱发所需的能量密度较小且自蔓延速度较高. 但当调制周期接近或小于层间原子互溶区厚度时, 临界能量密度和自蔓延速度的变化则有相反趋势. 对于一定厚度的纳米多层膜, 具有大调制周期和小周期数的调制结构对应的放热量大. 随激光脉冲持续时间的延长, Ti/Al纳米多层膜的激光临界诱发能量密度呈现递减趋势, 但最终趋于稳定. 激光诱发Ti/Al纳米多层膜自蔓延反应生成单一的TiAl金属间化合物.
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