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Monitoring of a ceramic surface temperature field induced by pulsed Nd: YAG laser

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2019
Online first only version (1.839Mb)
Authors
Knežević, Dragan
Radojković, Bojana
Ristić, Slavica
Polić, Suzana
Janićijević, Milovan
Tomić, Ljubiša
Jegdić, Bore
Article (Published version)
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Abstract
Temperature distribution induced by laser radiation is a very important parameter for an efficient and safe application of lasers in different ceramic processing techniques. This paper presents the results of an infrared thermography (IRT) application for monitoring temperature distribution on a ceramic surface during Nd: YAG laser irradiation with different fluences and 8ns pulse duration. FLIR, E40 and SC7200 IR cameras were used with the aim of recording the maximum temperature in the irradiated zones. It was expected that IRT could give some information related to the heat affected zone and possible damage to the base material; however, the results have shown that IR cameras, even those with high performance such as SC7200, cannot record the maximum temperature value at the moment of laser operation, but only the average temperature of the bulk sample material after laser pulses. The ... results of the numerical simulation have confirmed the value of the thermographic measurements. The microstructure and micromorphology of the ceramic surface before and after the laser treatment were analysed by optical and scanning electron microscopy as well as by examining the roughness of the irradiated and non- irradiated surfaces, while the micromechanical changes were analysed by comparing the micro-hardness of the irradiated and non-exposed surfaces.

Keywords:
Laser / Chemical properties / Surface properties / Scanning electron microscopy (SEM) / Numerical simulation
Source:
Thermal Science, 2019
Publisher:
  • Vinča Institute of Nuclear Sciences, Belgrade
Projects:
  • Investigation and Optimization of the Technological and Functional Performance of the Ventilation Mill in the Thermal Power Plant Kostolac B (RS-34028)
  • Ministry of Culture and Information of the Republic of Serbia project IP 391-00-16/2017-16/38

DOI: 10.2298/TSCI190811425K

ISSN: 2334-7163; 0354-9836

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URI
https://cer.ihtm.bg.ac.rs/handle/123456789/3978
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