金属表面氧化物激光去除的过程分析.doc
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金属表面氧化物激光去除的过程分析,process analysis of laser removal of metal oxides 15800字37页摘要 激光去除金属氧化物是一种很有效地激光清洗案例,在对整个去除过程分析时，无论直接采集激光诱导等离子体的特征辐射,还是用激光蒸发样品后由其它光源再激发而进行光谱分析,都...
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金属表面氧化物激光去除的过程分析
Process analysis of laser removal of metal oxides
15800字 37页
摘要 激光去除金属氧化物是一种很有效地激光清洗案例,在对整个去除过程分析时，无论直接采集激光诱导等离子体的特征辐射,还是用激光蒸发样品后由其它光源再激发而进行光谱分析,都是非常有吸引力的研究课题。对影响等离子体激发过程的因素分析，有助于我们探究激光诱导等离子体光谱特性形成的机理。在许多科研工作者广泛研究激光诱导等离子体特性的同时,推动了激光光谱分析技术的向前发展。本论文基于激光诱导等离子体技术来分析金属表面氧化物被去除的整个过程。
本文首先综述了国内外前人对这一主题的研究成果，并且简单介绍了等离子体的诱导机制和等离子体光谱的分析方法，阐述了光强，光谱特征，电子密度等方面的理论。实验采用3J的Nd:YAG激光器分五次脉冲作用于船用钢铁样品表面上，同时以延迟时间为750ns的数字脉冲延迟器开始工作，以控制中阶梯光栅光谱仪来接收由光缆传输进来的等离子体辐射信号。根据电脑获取的光谱图，我们重点分析了等离子体光谱特征，光强变化，电子密度等参数随着激光脉冲作用次数的变化。实验表明，因为等离子体的韧致效应和复合辐射效应，光谱整体呈现，连续谱为底，线状谱分立叠加在上的光谱特征。随着发射激光脉冲次数的增多，电子密度上升，然而随着氧化层被去除彻底，电子密度曲线趋于平缓。各个元素的谱线强度都有增加。
关键词 激光 金属氧化物 等离子体 光谱法 去除过程
Process analysis of laser removal of metal oxides
Abstract Laser removal of metal oxide is a kind of very effective laser cleaning case, on the removal process analysis, whether direct acquisition of the laser induced plasma characteristic radiation, or by laser evaporation samples by other light excitation and spectral analysis, are very attractive research topic. Analysis on the factors affecting the plasma excitation process, the mechanism can help us to explore the spectral characteristics of laser induced plasma formation. Laser induced plasma characteristics widely studied in many research workers at the same time, pushing forward the development of laser spectroscopy.Laser induced material to analyze the whole process of metal oxide surface was removed to produce plasma characteristics in function and material based on.
This paper firstly summarizes the results of previous studies on this topic, and briefly introduces the analysis method of plasma induced mechanism and plasma spectroscopy. Introduced in the spectral analysis, intensity, spectral characteristics, the theoretical basis of the electronic density. Using Nd:YAG 3Jfive laser pulses to the marine steel sample surface, and at the same time, delay time of 750ns digital pulse delay circuit starts to work, in order to control the echelle spectrometer to receive the plasma radiation signal in the optical cable transmission. According to the spectra of computer access, we focus on the analysis of the plasma spectra, light intensity, electron density and other parameters change with the number of laser pulses.Because plasma bremsstrahlung and compound radiation effect, spectral overall presentation, continuous spectrum for the bottom, line spectrum discrete spectral characteristics of superimposed on. With the laser pulse is divided into laser pulse energy enhancement, the electron density increased, however, along with the oxide layer is removed completely, the electron density curve tends to be gentle.spectral line intensity of each element are added.
Keywords laser metallic oxide Plasma Spectral method Removal process
目 录
第一章 绪论 1
1.1 引言 1
1.2 等离子体光谱分析的研究现状 1
1.2.1发展概述 1
1.2.2 声波法监测激光除锈 1
1.2.3光谱法监测激光清洗钛合金 3
1.2.4等离子光谱的分析 6
1.3 本论文的主要工作 7
第二章 激光与材料的相互作用机理 8
2.1激光与材料作用的一般规律 8
2.2等离子体 10
2.3激光诱导等离子体的形成机理 10
2.4等离子体光谱分析 12
2.4.1三大假设条件 12
2.4.2 连续谱与线状谱 12
2.4.3激光诱导等离子体电子密度理论分析 14
2.4.4光谱谱宽 15
2.5关于钢铁的腐蚀 16
第三章 光谱法分析激光去除金属氧化物的过程 18
3.1 引言 18
3.2 实验装置 18
3.3 实验结果及分析 19
3.3.1光谱谱线分析 21
3.3.2 随着脉冲次数增加的谱线强度的分析 22
3.3.3 随着脉冲次数增加的的电子数密度变化分析 24
3.4 总结 26
结 论 27
致 谢 28
参考文献 29
Process analysis of laser removal of metal oxides
15800字 37页
摘要 激光去除金属氧化物是一种很有效地激光清洗案例,在对整个去除过程分析时，无论直接采集激光诱导等离子体的特征辐射,还是用激光蒸发样品后由其它光源再激发而进行光谱分析,都是非常有吸引力的研究课题。对影响等离子体激发过程的因素分析，有助于我们探究激光诱导等离子体光谱特性形成的机理。在许多科研工作者广泛研究激光诱导等离子体特性的同时,推动了激光光谱分析技术的向前发展。本论文基于激光诱导等离子体技术来分析金属表面氧化物被去除的整个过程。
本文首先综述了国内外前人对这一主题的研究成果，并且简单介绍了等离子体的诱导机制和等离子体光谱的分析方法，阐述了光强，光谱特征，电子密度等方面的理论。实验采用3J的Nd:YAG激光器分五次脉冲作用于船用钢铁样品表面上，同时以延迟时间为750ns的数字脉冲延迟器开始工作，以控制中阶梯光栅光谱仪来接收由光缆传输进来的等离子体辐射信号。根据电脑获取的光谱图，我们重点分析了等离子体光谱特征，光强变化，电子密度等参数随着激光脉冲作用次数的变化。实验表明，因为等离子体的韧致效应和复合辐射效应，光谱整体呈现，连续谱为底，线状谱分立叠加在上的光谱特征。随着发射激光脉冲次数的增多，电子密度上升，然而随着氧化层被去除彻底，电子密度曲线趋于平缓。各个元素的谱线强度都有增加。
关键词 激光 金属氧化物 等离子体 光谱法 去除过程
Process analysis of laser removal of metal oxides
Abstract Laser removal of metal oxide is a kind of very effective laser cleaning case, on the removal process analysis, whether direct acquisition of the laser induced plasma characteristic radiation, or by laser evaporation samples by other light excitation and spectral analysis, are very attractive research topic. Analysis on the factors affecting the plasma excitation process, the mechanism can help us to explore the spectral characteristics of laser induced plasma formation. Laser induced plasma characteristics widely studied in many research workers at the same time, pushing forward the development of laser spectroscopy.Laser induced material to analyze the whole process of metal oxide surface was removed to produce plasma characteristics in function and material based on.
This paper firstly summarizes the results of previous studies on this topic, and briefly introduces the analysis method of plasma induced mechanism and plasma spectroscopy. Introduced in the spectral analysis, intensity, spectral characteristics, the theoretical basis of the electronic density. Using Nd:YAG 3Jfive laser pulses to the marine steel sample surface, and at the same time, delay time of 750ns digital pulse delay circuit starts to work, in order to control the echelle spectrometer to receive the plasma radiation signal in the optical cable transmission. According to the spectra of computer access, we focus on the analysis of the plasma spectra, light intensity, electron density and other parameters change with the number of laser pulses.Because plasma bremsstrahlung and compound radiation effect, spectral overall presentation, continuous spectrum for the bottom, line spectrum discrete spectral characteristics of superimposed on. With the laser pulse is divided into laser pulse energy enhancement, the electron density increased, however, along with the oxide layer is removed completely, the electron density curve tends to be gentle.spectral line intensity of each element are added.
Keywords laser metallic oxide Plasma Spectral method Removal process
目 录
第一章 绪论 1
1.1 引言 1
1.2 等离子体光谱分析的研究现状 1
1.2.1发展概述 1
1.2.2 声波法监测激光除锈 1
1.2.3光谱法监测激光清洗钛合金 3
1.2.4等离子光谱的分析 6
1.3 本论文的主要工作 7
第二章 激光与材料的相互作用机理 8
2.1激光与材料作用的一般规律 8
2.2等离子体 10
2.3激光诱导等离子体的形成机理 10
2.4等离子体光谱分析 12
2.4.1三大假设条件 12
2.4.2 连续谱与线状谱 12
2.4.3激光诱导等离子体电子密度理论分析 14
2.4.4光谱谱宽 15
2.5关于钢铁的腐蚀 16
第三章 光谱法分析激光去除金属氧化物的过程 18
3.1 引言 18
3.2 实验装置 18
3.3 实验结果及分析 19
3.3.1光谱谱线分析 21
3.3.2 随着脉冲次数增加的谱线强度的分析 22
3.3.3 随着脉冲次数增加的的电子数密度变化分析 24
3.4 总结 26
结 论 27
致 谢 28
参考文献 29
