Pulsed laser ablation of dense sintered AlN and AlN powder samples studied by time-of-flight mass spectroscopy

被引：11
|
作者：
Günster, J
Görke, R
Heinrich, JG
Souda, R
机构：
[1] Tech Univ Clausthal, Inst Nichtmet Werkstoffe, D-38678 Clausthal Zellerfeld, Germany
[2] Natl Inst Res Inorgan Mat, Tsukuba, Ibaraki 3050044, Japan
来源：
APPLIED SURFACE SCIENCE | 2001年 / 173卷 / 1-2期
关键词：
AlN; mass spectroscopy; laser; sintering;
D O I：
10.1016/S0169-4332(00)00886-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The response of tape-casted polycrystalline dense sintered AlN wafers and uniaxial densified AIN powder pellets to pulsed laser radiation (pulse length 7 ns FWHM) is studied at energy fluences over the ablation threshold. The pulse energy is varied between 64 and 1400 mJ/cm(2) at wavelengths between 250 and 1000 nm. The ablation yield is quantified by a quadruple mass spectrometer. Dense sintered AlN samples show a linear response upto 400 mJ/cm(2) while at fluences over 400 mJ/cm(2) a saturation of the ablation yield is noticeable. AlN powder samples, on the other hand, do not show this saturation. Moreover, the total ablation yield on powder samples is significantly higher. These observations supplemented by secondary electron microscopy images have been discussed in terms of sample composition, surface metallization, and ablation plume formation. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：76 / 83
页数：8
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