Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1994-10-31
1996-07-16
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
356 36, 356316, 356318, G01N 100, G01N 2163, G01N 2172, G01N 2173
Patent
active
055372066
ABSTRACT:
A method for analyzing steel which comprises: grinding an analysis area of a steel ingot; sealing the analysis area with a sealing section of a cell for generating fine particles; again grinding the analysis area, while an argon gas is introduced into the cell; irradiating a pulsed laser beam of 10.sup.8 W/cm.sup.2 or more onto the analysis area at an irradiating spot of at least 1 mm.sup.2 to generate the fine particles; moving the irradiating spot; and transferring the generated fine particles by the argon gas to a plasma emission analysis for analysis. A further method for analyzing steel comprises: solidifying a molten steel sample, forming a red-hot sample; putting the sample into a sample holding section of a sample chamber under a purified argon gas atmosphere, the sample holding section having an inner curved surface the same as a curved surface of the sample; irradiating a pulsed laser onto the sample to remove a sample surface layer of 25 .mu.m or more of the sample and to generate fine particles from the sample; and exciting the fine particles by a plasma emission analyzer to analyze the composition of the fine particles.
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JIS G 1253, "Method for Photoelectric Emission Spectrochemical Analysis of Iron and Steel". 1983.
Kantor et al., "Atomic-Absorption Spectrometry of Laser-Nebulized Sample", Talanta, Vol. 23, No. 8, Aug. 1976, pp. 585-586.
Mitchell et al, "Direct Determination of Copper in Solids by Direct Current Argon Plasma Emission Spectrometry with Sample Introduction Using Laser Ablation", Applied Spectroscopy, Vol. 41, No. 1, 1987, pp. 141-148.
Akiyoshi Takanori
Ishibashi Yohichi
Iwata Yoshihito
Kawai Yoshihiko
Kinoshiro Satoshi
Evans F. L.
NKK Corporation
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