Laser interaction with low-density carbon foam

Abstract

Experiments were performed with a 15 J/500 ps Nd:glass laser (λ = 1064 nm) focussed to an intensity >10 14 W/cm 2 . X-ray emissions from carbon foam and 5% Pt-doped carbon foam of density 150-300 mg/cc were compared with that of the solid carbon targets. The thickness of the carbon foam was 15 μm on a graphite substrate. X-ray emission was measured using semiconductor X-ray diodes covered with various filters having transmissions in different X-ray spectral ranges. It covered X-ray spectrum of 0.8-8.5 keV range. The X-ray emission in the soft X-ray region was observed to increase to about 1.8 times and 2.3 times in carbon foam and Pt-doped foam, respectively with respect to solid carbon. In hard X-rays, there was no measurable difference amongst the carbon foam, Pt-doped carbon foam and solid carbon. Scanning electron microscope (SEM) analysis demonstrates that foam targets smoothens the crater formed by the laser irradiation.

Fundamental properties of high-quality carbon nanofoam: from low to high density

“…Among these are carbon aerogels [41–43], amorphous carbon nanoparticles [44–45], nanoporous carbons [46], carbon nanotube scaffolds [47], and carbon foams [48–49]. The densities of these carbon materials are significantly lower compared to “heavy carbons” such as pristine graphite (2.26 g·cm −3 ), CVD grown carbon films (2.14 g·cm −3 [50]), or carbon nanotube forests (1.6 to 0.38 g·cm −3 [51]).…”

Ultralight carbon nanofoam from naphtalene-mediated hydrothermal sucrose carbonization

“…Among these are carbon aerogels [49][50][51], nanoporous carbons [52], amorphous carbon nanoparticles [53,54], carbon nanotube scaffolds [55], and carbon foams [56,57]. The densities of these carbon materials are significantly different from 'heavy carbons' such as pristine graphite (2.26 g·cm −3 ), DVD grown carbon films (2.14 g·cm −3 [58]), or carbon nanotube forests (1.6 to 0.38 g·cm −3 [59]).…”

Laser Cutting of Aluminum Foam: Experimental and Model Studies

“…Laser processing of foams was investigated previously [3][4][5][6][7][8][9][10], the main emphasis was given to demonstrate the application of lasers in bending, foam production, drilling, and surface coating. Moreover, laser cutting of metallic substrates and thermal stress analysis were investigated previously [11][12][13][14][15].…”