论文部分内容阅读
An innovative application of laser ablation inductively coupled plasma mass spectrometry(LA-ICP-MS) technique in illustrating elemental distributions on stainless steel sheets was presented. The technique proved to be a systematic and accurate approach in producing visual images or maps of elemental distributions at cross-sectional surface of a stainless steel sheet. Two stainless steel sheets served as research objects: 3 mm×1 300 mm hot-rolled stainless steel plate and 1 mm×1 260 mm cold-rolled plate. The cross-sectional surfaces of the two samples at 1/4 position along the width direction were scanned(raster area-44 mm2 and 11 mm2) with a focused laser beam(wavelength 213 nm, diameter of laser crater 100 μm, and laser power 1.6 m J) in a laser ablation chamber. The laser ablation system was coupled to a quadrupole ICP-MS, which made the detection of ion intensities of 27Al+, 44Ca+, 47Ti+, 55Mn+ and 56Fe+ within an area of interest possible. One-dimensional(1D) content line distribution maps and twodimensional(2D) contour maps for specific positions or areas were plotted to indicate the element distribution of a target area with high accuracy. Statistic method was used to analyze the acquired data by calculating median contents, maximum segregation, statistic segregation and content-frequency distribution.
An innovative application of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) technique in illustrating elemental distributions on stainless steel sheets was presented. The technique demonstrated to be a systematic and accurate approach in producing visual images or maps of elemental distributions at Cross-sectional surfaces of a stainless steel sheet. Two stainless steel sheets served as research objects: 3 mm × 1 300 mm hot-rolled stainless steel plate and 1 mm × 1 260 mm cold-rolled plate. The cross-sectional surfaces of the two samples at 1/4 position along the width direction were scanned (raster area-44 mm2 and 11 mm2) with a focused laser beam (wavelength 213 nm, diameter of laser crater 100 μm, and laser power 1.6 m J) in a laser The laser ablation system was coupled to a quadrupole ICP-MS, which made the detection of ion intensities of 27Al +, 44Ca +, 47Ti +, 55Mn + and 56Fe + within an area of interest possible. One-dimensional (1D) content line distri bution maps and twodimensional (2D) contour maps for specific positions or areas were plotted to indicate the element distribution of a target area with high accuracy. Statistic method was used to analyze the acquired data by calculating median contents, maximum segregation, statistic segregation and content -frequency distribution.