Effect of the Thickness of a Diamond-Like Carbon Layer on the Local Temperature Increase in a Multilayered Structure Induced by Laser Heating

• Published in: Numerical heat transfer. Part A, Applications Vol. 67; no. 7; pp. 791 - 807
• Main Authors: Yu, Peng, Zhou, Weidong, Yu, Shengkai
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis Group 03.04.2015; Taylor & Francis Ltd
• Subjects: Computer simulation; Diamond-like carbon; Diamonds; Heat conductivity; Heat transfer; Heating; Lasers; Mathematical models; Numerical analysis; Simulation; Thermal conductivity
• ISSN: 1040-7782; 1521-0634
• DOI: 10.1080/10407782.2014.949185

The present study concerns the effect of the thickness of the overcoating layer on the local temperature increase in the multilayered structure subject to laser heating. The numerical simulation indicates that the presence of the diamond-like carbon (DLC) layer on the top of multilayered structure enhances local temperature increase, compared with the same structure without the DLC layer. This enhancement gradually becomes significant with an increase in the thickness of DLC layer. The DLC layer only absorbs small amount of laser energy. However, the energy accumulates in the DLC layer due to its low thermal conductivity, resulting in significant temperature increase.