Surface Structuring and Thin Film Coating through Additive Concept Using Laser Induced Plasma of Mg Alloy: A Comparison between the Presence and Absence of Transverse Magnetic Field (TMF)

• Published in: Coatings (Basel) 2022-09, Vol.12 (9), p.1316
• Main Authors: Dawood, Asadullah, Bashir, Shazia, Ahmed, Naveed, Hayat, Asma, AlFaify, Abdullah, Sarfraz, Syed, Abbasi, Shahab, Ur Rehman, Ateekh
• Format: Article
• Language: English
• Subjects: Ablation; Alloys; Analysis; Argon; Biocompatibility; Coatings; Dielectric films; Emission spectra; Helium; Ion implantation; Laser induced breakdown spectroscopy; Laser plasmas; Lasers; Magnesium base alloys; Magnetic fields; Multilayers; Neodymium lasers; Neon; Optimization; Parameters; Plasma; Plasma control; Rare gases; Semiconductor lasers; Specialty metals industry; Spectrum analysis; Surface structure; Thin film coatings; Thin films; Transplants & implants; YAG lasers
• ISSN: 2079-6412; 2079-6412
• DOI: 10.3390/coatings12091316

In the present study, the influence of a 1.1 tesla Transverse Magnetic Field (TMF) on Laser-Induced Breakdown Spectroscopy (LIBS) of Mg-alloy plasma has been explored. The Mg plasma was produced using an Nd: YAG laser (1064 nm, 10 ns) at an intensity of 2 GW/cm2. Inert gases of Ar, Ne, and He were filled as environmental gases at pressures ranging from 1 to 100 Torr. Optical emission spectra from laser-produced plasma were detected with the help of a spectrometer, and plasma parameters such as excitation temperature (Texc) and electron number density (ne) were evaluated. Enhancement in the Mg plasma’s Texc and ne in the presence of TMF was noticed under all experimental conditions, including different ambient gases with varying pressures and time delays (0.42 µs–9.58 µs). Plasma confinement by applied TMF was analytically evaluated through thermal beta (βt) values, which were