Microstructural and plasma characteristics of Mg alloy irradiated by 1064 nm Nd: YAG laser in neon and helium

IF 1.5 4区物理与天体物理 Q3 OPTICS The European Physical Journal D Pub Date : 2025-04-11 DOI:10.1140/epjd/s10053-025-00985-0

Asadullah Dawood, Muhammad Asad Khan, Umm-i-Kalsoom, Muhammad Javed, Nisar Ali

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Abstract

The study investigates the effects of varying laser fluence on surface changes and plasma characteristics of magnesium (Mg) alloy. A 1064 nm Nd: YAG laser with a 10 ns pulse length and a repetition rate of 1 to 10 Hz was used to irradiate Mg-alloy targets. Fluences ranged from 1.3 to 10.47 J cm⁻² in neon (Ne) and helium (He) environments. Scanning electron microscopy (SEM) analysis revealed that micro-holes, ridges, conical structures, micro-particles, cracking and micro-grains have been found on the irradiated Mg targets. The formation of structures is more pronounced and distinct in the case of Ne (with higher electron temperature and electron density) as compared to the He environment. Laser-induced breakdown spectroscopy (LIBS) measured plasma properties, specifically electron temperature (T_e) and number density (n_e), both of which increased with fluence. X-ray diffraction (XRD) was used to examine phase purity and structural attributes, aiding in material behavior exploration and the development of novel materials. The hardness of irradiated Mg targets, measured using a Vickers micro-hardness tester, exceeded that of the pristine Mg target. The study demonstrates that Te and ne significantly impact the increase in hardness and the formation of surface structures in Mg alloy.

Graphic abstract

Comparative study of Mg alloy surface morphology and plasma parameters upon Nd:YAG laser irradiation in neon and helium gases, revealing structural and plasma behavior at different fluences

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1064 nm Nd: YAG激光辐照镁合金的显微组织和等离子体特性

研究了不同激光辐照强度对镁合金表面变化和等离子体特性的影响。采用1064 nm Nd: YAG激光器，脉冲长度为10 ns，重复频率为1 ~ 10 Hz，对镁合金靶进行辐照。氖（Ne）和氦（He）环境的影响范围为1.3 ~ 10.47 jcm−2。扫描电镜（SEM）分析表明，辐照后的Mg靶表面存在微孔、脊状结构、圆锥形结构、微颗粒、裂纹和微晶粒。与He环境相比，Ne（具有更高的电子温度和电子密度）的结构形成更为明显和明显。激光诱导击穿光谱（LIBS）测量了等离子体的性质，特别是电子温度（Te）和电子数密度（ne），两者都随着通量的增加而增加。利用x射线衍射（XRD）检测相纯度和结构属性，有助于材料行为的探索和新材料的开发。用维氏显微硬度计测定辐照Mg靶材的硬度，结果表明辐照Mg靶材的硬度高于原始Mg靶材。研究表明，Te和ne对镁合金硬度的提高和表面组织的形成有显著影响。Nd:YAG激光在氖气和氦气中辐照镁合金的表面形貌和等离子体参数的比较研究，揭示了不同影响下镁合金的结构和等离子体行为

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来源期刊

The European Physical Journal D 物理-物理：原子、分子和化学物理

CiteScore

3.10

自引率

11.10%

发文量

213

审稿时长

3 months

期刊介绍： The European Physical Journal D (EPJ D) presents new and original research results in: Atomic Physics; Molecular Physics and Chemical Physics; Atomic and Molecular Collisions; Clusters and Nanostructures; Plasma Physics; Laser Cooling and Quantum Gas; Nonlinear Dynamics; Optical Physics; Quantum Optics and Quantum Information; Ultraintense and Ultrashort Laser Fields. The range of topics covered in these areas is extensive, from Molecular Interaction and Reactivity to Spectroscopy and Thermodynamics of Clusters, from Atomic Optics to Bose-Einstein Condensation to Femtochemistry.