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@inproceedings{698780,
author = {Novotný, Karel and Staňková, Alice and Häkkänen, Heikki and KorppiandTommola, Jouko and Otruba, Vítězslav and Kanický, Viktor},
address = {Montreal, Canada},
booktitle = {LIBS2006 Laser Induced Plasma Spectroscopy and Applications},
keywords = {tungsten carbides; hard metal precursors; LIBS; laser ablation},
language = {eng},
location = {Montreal, Canada},
pages = {84-84},
publisher = {National Research Council Canada},
title = {Analysis of powdered tungsten carbide hard metal precursors using laser induced breakdown spectroscopy},
year = {2006}
}
TY - JOUR
ID - 698780
AU - Novotný, Karel - Staňková, Alice - Häkkänen, Heikki - Korppi-Tommola, Jouko - Otruba, Vítězslav - Kanický, Viktor
PY - 2006
TI - Analysis of powdered tungsten carbide hard metal precursors using laser induced breakdown spectroscopy
PB - National Research Council Canada
CY - Montreal, Canada
KW - tungsten carbides
KW - hard metal precursors
KW - LIBS
KW - laser ablation
N2 - Laser-induced breakdown spectroscopy (LIBS) has been applied to direct analysis of powdered tungsten carbide hard metal precursors and cemented tungsten carbides. The aim of work was to examine the possibility of quantitative determination of the niobium, titanium, tantalum and cobalt. Samples were presented for ablation as pressed pellets with and without binder (powdered silver) and as cemented tungsten carbides. Pellets were prepared by pressing of powdered material by means of hydraulic press. Cemented tungsten carbide requires no sample preparation. Several laser and detection systems were used for measurements. The Nd:YAG laser working at basic wavelength 1064 nm and fourth harmonic frequency 266 nm with gated photomultiplier or ICCD detector HORIBA JY was used for determination in pressed pellets and cemented tungsten carbides. The ICCD detector DICAM PRO with Mechelle 7500 spectrometer was used with ArF laser (193 nm) and KrF laser (248 nm). Different types of atmosphere (air, He, Ar) were investigated for analysis. Linear calibration curves were obtained for Nb, Ti, and Ta. Certain optimisation is required for determination cobalt in samples. Different results for pressed pellets with and without a binder are due the presence of powdered silver in samples, which works based on different mechanism of ablation.
ER -
NOVOTNÝ, Karel, Alice STAŇKOVÁ, Heikki HÄKKÄNEN, Jouko KORPPI-TOMMOLA, Vítězslav OTRUBA and Viktor KANICKÝ. Analysis of powdered tungsten carbide hard metal precursors using laser induced breakdown spectroscopy. In \textit{LIBS2006 Laser Induced Plasma Spectroscopy and Applications}. Montreal, Canada: National Research Council Canada, 2006, p.~84.
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