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准备金属散体样本通过激光切除在酸性液体中进行传输电子显微镜分析

Mohammad Jafari Eskandari¹, Masoud Araghchi¹

¹Leading Material Organization, Nuclear Science and Technology Research Institute (NSTRI), P.O. Box 11365-8486, Tehran, Islamic Republic of Iran.

Micron (Oxford, England : 1993)

|September 7, 2023

概括

激光除提供了一种快速,环保的方法来准备用于传输电子显微镜 (TEM) 的金属样品. 与传统方法相比,这种技术最大限度地减少了热损伤和化学废物.

科学领域:

材料科学材料科学材料科学
表面工程是什么?表面工程是什么?
分析化学分析化学

背景情况:

激光切除是一种精确的技术,用于金属的微/纳米表面修饰.
用于传输电子显微镜 (TEM) 的样本准备需要保存晶体结构的方法.
传统的方法,如喷气式电抛光,可能是化学密集型的,可能会引起热损伤.

研究的目的:

评价激光切除作为一种准备纯批量样本用于TEM分析的方法.
为了比较激光切除与标准喷射电抛光的有效性.
评估激光切除对样品晶体结构和热效应的影响.

主要方法:

纯板使用纤维激光扫描在5%的酸/95%的乙醇溶液中准备好.
激光切除参数: 100 W CW 光纤激光,波长为 1064 nm,焦距为 305 mm.
在用激光切除和喷射电抛光制备的样本上进行了TEM分析.

主要成果:

激光切除可以防止氧化,并最大限度地减少受热影响的区域.
与喷射电抛光相比,没有观察到颗粒大小 (600-800 nm) 或晶格缺陷的显著变化.
对于这两种方法,在谷物边界和内部发现了最小的位移.

结论:

激光切除是一种可行的,环保的替代品,用于用于TEM的金属批量样本的准备.
这种方法快速,经济高效,使用的化学品最小.
它保留了材料的原始晶体结构,与传统技术相提并论.

关键词:

喷气式电抛光喷气式电抛光激光切除术是一种激光切除术.纯的纯是一种样品的准备样品的准备传输电子显微镜的使用

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