摘要
报道了一种在铝样品表面涂抹碳层以降低样品表面对激光束的反射率，提高激光诱导等离子体辐射强度的方法。结果表明，当一束高能量激光（-10J）作用于覆盖有16μm的有两次涂抹碳层的铝样品时，激光等离子体发射的谱线强度提高了8％-29%。通过测量铝元素一组谱线强度，用斜率法求得等离子体的激发温度。铝样品表面涂抹合适厚度的碳层时，由于激光等离子体半径增大，激发温度和辐射强度均有提高，证明激光烧蚀能量与样品的热耦合效率提高。研究还发现，更强的原子发射光谱出现在激光等离子体径向的1mm处，而不是在其中心位置。
In order to reduce the reflectance of laser beam on sample surface and enhance the radiation intensity of laser-induced metal plasma, a method has been studied for daubing with carbon coating on the surface of aluminium sample. The results have shown that the spectral line intensity of the laser plasma increases by 8%-29% when a bunch of high-energy neodymium glass laser （-10J） acts on the aluminium sample with a double-carbon coating of which the thickness is 16μm. The plasma temperature was got by a slope-method through measuring the intensity of a set of spectral lines. Carbon of proper thickness was coated on the surface of aluminium sample, due to increase of laser plasma radius, the excitation temperature and the radiation intensities were increased. This demonstrates that the coupling efficiency between laser ablation energy and the sample had been increased. In addition , it was found that the stronger intensity of atomic emission spectrum appears at 1mm from the radial location of laser plasma, and is not at the central place.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
2008年第10期1-4,共4页
Metallurgical Analysis
基金
河北省自然科学基金(A2006000951)
关键词
激光诱导等离子体
辐射强度
激发温度
铝样品
碳涂层
laser-induced plasma
radiation intensity
excitation temperature
aluminium sample
carbon coating
