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@article{336051,
author = {Kanický, Viktor and Otruba, Vítězslav and Mermet, JeanandMichel},
article_location = {Amsterdam},
article_number = {10},
keywords = {Inductively Coupled Plasma; Atomic Emission Spectrometry; Laser Ablation; Tungsten Carbide Coating; Cobalt-cemented WC; Infrared Laser},
language = {eng},
issn = {0584-8547},
journal = {Spectrochimica Acta Part B},
title = {Analysis of tungsten carbide coatings by infrared laser-induced argon spark with inductively coupled plasma atomic emission spectrometry},
volume = {55},
year = {2000}
}
TY - JOUR
ID - 336051
AU - Kanický, Viktor - Otruba, Vítězslav - Mermet, Jean-Michel
PY - 2000
TI - Analysis of tungsten carbide coatings by infrared laser-induced argon spark with inductively coupled plasma atomic emission spectrometry
JF - Spectrochimica Acta Part B
VL - 55
IS - 10
SP - 1601
EP - 1601
PB - Elsevier Science
SN - 05848547
KW - Inductively Coupled Plasma
KW - Atomic Emission Spectrometry
KW - Laser Ablation
KW - Tungsten Carbide Coating
KW - Cobalt-cemented WC
KW - Infrared Laser
N2 - Infrared laser ablation was studied for application to the analysis of plasma-sprayed tungsten carbide/cobalt coatings. The potential of the laser induced argon-spark (LINA-Spark), as a sample introduction device in inductively coupled plasma atomic emission spectrometry was studied. The use of an IR laser along with defocusing led to laser-induced microplasma-based ablation. The mass ablation rate, represented by the ICP emission intensity per laser beam unit area, exhibited a flat increase in the irradiance range 2–250 GW/cm2. A low slope (0.5) of this dependence in log–log scale gave evidence of plasma shielding. The steep increase in the measured acoustic signal when focused in front of the sample, i.e. in argon, indicated a breakdown of argon. Consequently, considerably lower ICP emissions were observed within the same range of irradiance. The cobalt/tungsten line intensity ratio in the ICP was practically constant from 1.5 up to at least 250 GW/cm2. Acceptable precision (R.S.D.<5%) was obtained without internal standardization for irradiance between 2 and 8 GW/cm2. Optimization of the laser pulse energy, repetition rate, beam focusing and sample displacement during interaction led to the linearization of dependences of signal vs. cobalt percentage, at least up to the highest studied value of 23% Co.
ER -
KANICKÝ, Viktor, Vítězslav OTRUBA a Jean-Michel MERMET. Analysis of tungsten carbide coatings by infrared laser-induced argon spark with inductively coupled plasma atomic emission spectrometry. \textit{Spectrochimica Acta Part B}. Amsterdam: Elsevier Science, 2000, roč.~55, č.~10, s.~1601-1610. ISSN~0584-8547.
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