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Microparticles of High Entropy Alloys Made by Laser-Induced Forward Transfer.

Molong HanAshok MeghwalSoon Hock NgDaniel SmithHaoran MuTomas KatkusDe Ming ZhuReiza MukhlisJitraporn Pimm VongsvivutChristopher C BerndtAndrew S M AngSaulius Juodkazis
Published in: Materials (Basel, Switzerland) (2022)
The controlled deposition of CoCrFeNiMo0.2 high-entropy alloy (HEA) microparticles was achieved by using laser-induced forward transfer (LIFT). Ultra-short laser pulses of 230 fs of 515 nm wavelength were tightly focused into ∼2.4 μm focal spots on the ∼50-nm thick plasma-sputtered films of CoCrFeNiMo0.2. The morphology of HEA microparticles can be controlled at different fluences. The HEA films were transferred onto glass substrates by magnetron sputtering in a vacuum (10-8 atm) from the thermal spray-coated substrates. The absorption coefficient of CoCrFeNiMo0.2α≈6×105 cm-1 was determined at 600-nm wavelength. The real and imaginary parts of the refractive index (n+iκ) of HEA were determined from reflectance and transmittance by using nanofilms.
Keyphrases
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  • computed tomography
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