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Very high laser-damage threshold of polymer-derived Si(B)CN-carbon nanotube composite coatings

Published

Author(s)

Romil Bhandavat, Ari Feldman, Christopher L. Cromer, John H. Lehman, Gurpreet Singh

Abstract

We study the laser irradiance behavior and resulting structural evolution of polymer-derived silicon −boron−carbonitride (Si(B)CN) functionalized multiwall carbon nanotube (MWCNT) composite spray coatings on copper substrate. We report a damage threshold value of 15 kWcm‑2 and an optical absorbance of 0.97 after irradiation. This is an order of magnitude improvement over MWCNT (1.4 kWcm−2, 0.76), SWCNT (0.8 kWcm−2, 0.65) and carbon paint (0.1 kWcm−2, 0.87) coatings previously tested at 10.6 υm (2.5 kW CO2 laser) exposure. Electron microscopy, Raman spectroscopy, and X- ray photoelectron spectroscopy suggests partial oxidation of Si(B)CN forming a stable protective SiO2 phase upon irradiation.
Citation
Journal of Applied Physics
Volume
5
Issue
7

Keywords

carbon nanotubes, coatings, laser irradiance, polymer-derived ceramic, radiometry, Si(B)CN, thermal detectors

Citation

Bhandavat, R. , Feldman, A. , Cromer, C. , Lehman, J. and Singh, G. (2013), Very high laser-damage threshold of polymer-derived Si(B)CN-carbon nanotube composite coatings, Journal of Applied Physics, [online], https://doi.org/10.1021/am302755x (Accessed April 13, 2024)
Created March 18, 2013, Updated October 12, 2021