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- W4366115136 abstract "Plasma temperature measurement and 2D light intensity mapping of an industrial plasma spraying equipment developed by 2PS (14 - 45 kW, Ar/H<sub>2</sub> plasma, AL<sub>2</sub>O<sub>3</sub> powder) is performed based on atomic emission spectroscopy and near infrared pyrometry. The influence of the process parameter variations onto the plasma electron density with and without AL<sub>2</sub>O<sub>3</sub> powder has been identified.<br> Plasma temperature and electron density are determined by Atomic Emission Spectroscopy (a monochromator with focal length of 320 mm is used, allowing spectra acquisitions on a wide spectral range up to 70 nm) based on the H-beta line broadening in the assumption of plasma equilibrium. A 2D pyrometer (vision zone 10 × 10 mm<sup>2</sup>) with the 0.860 µm spectral band has been applied to obtain the radiative intensity mapping of the jet. A 1 spot monochromatic pyrometer (in the 1.5 µm spectral range) sighted to the impact area has been used to control in real time the substrate brightness temperature versus process parameters.<br> The following variations of operational conditions were studied: hydrogen flow rate (0-15 l/min), powder flow rate (10-20 g/min) and current (500 - 700 A), argon flow rate was fixed (70 l/min). It has been found that along the jet axis (up to 40 mm from the nozzle) the temperature and the electron density vary in the range 13 000 - 11 000 K and 1.4 10<sup>17</sup> - 4 10<sup>16</sup> cm<sup>−3</sup> respectively. The 2D radiation intensity fields are rather sensitive to the variation of current and H<sub>2</sub> flow rate and visualise the plasma flow pattern." @default.
- W4366115136 created "2023-04-19" @default.
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- W4366115136 date "2023-01-01" @default.
- W4366115136 modified "2023-09-30" @default.
- W4366115136 title "CHARACTERISATION OF AL2O3 PLASMA SPRAYING BY ATOMIC EMISSION SPECTROSCOPY AND NEAR INFRARED PYROMETRY" @default.
- W4366115136 doi "https://doi.org/10.1615/itppc-2000.640" @default.
- W4366115136 hasPublicationYear "2023" @default.
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