Microparticles of High Entropy Alloys Made by Laser-Induced Forward Transfer
Autor: | Molong Han, Ashok Meghwal, Soon Hock Ng, Daniel Smith, Haoran Mu, Tomas Katkus, De Ming Zhu, Reiza Mukhlis, Jitraporn Vongsvivut, Christopher C. Berndt, Andrew S. M. Ang, Saulius Juodkazis |
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Rok vydání: | 2022 |
Předmět: | |
Zdroj: | Materials; Volume 15; Issue 22; Pages: 8063 |
ISSN: | 1996-1944 |
DOI: | 10.3390/ma15228063 |
Popis: | 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. |
Databáze: | OpenAIRE |
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