Analysis of magnesium and copper in aluminum alloys with high repetition rate laser-ablation spark-induced breakdown spectroscopy

Highly sensitive analysis of trace elements in aqueous solutions using surface-enhanced and discharge-assisted laser-induced breakdown spectroscopy

“…The temperature and electron density of the Al plasma with the spark discharge were higher than those of the Al plasma without the spark discharge, thereby realizing the re-excitation of the Al plasma. 28–31,33–36 Then more atoms and ions were excited to upper electronic states by discharge-assisted LIBS. Obviously, the heavy metal elements in the Al plasma were also excited to upper electronic states.…”

“…The main reason is that discharge-assisted LIBS greatly enhances the atomic emission in the laser-plasma and prolongs its emission lifetime. 33–35 The linear fitting determination coefficient ( R 2 ) and relative standard deviation (RSD) of Cr, Cu, and Pb are also shown in Table 2. The result shows that compared to the case of surface-enhanced LIBS, the discharge-assisted and surface-enhanced LIBS technology improves the correlation and stability of Cr( i ), Cu( i ), and Pb( i ).…”

Improving the emission intensity of laser-induced breakdown spectroscopy by tip discharge of a Tesla coil

“…The discharge transfers energy to the plasma, thereby realizing the re-heating and re-exciting process of the plasma. 27,37 For the experiment in the presence of Tesla coil discharge, the Tesla coil discharge ionized the air, leading to increased collisions between particles and pre-ionization of the sample surface. On the other hand, the Tesla coil discharge will increase the temperature of the sample surface, reduce the sample reectivity, and increase the interaction between the laser and the sample.…”

“…25,26 It is a relatively simple method to combine LIBS with discharge to improve the signal intensity and analysis sensitivity. He et al used high-repetition-rate spark-discharged LIBS (SD-LIBS) to analyze Mg and Cu in Al alloys, 27 showing that the signal of the technique was 8-12 times higher than that without discharge. Wang et al used SD-LIBS to detect lead in aqueous solutions, 21 revealing that the spark discharge reduced the detection limit from 53.5 ng mL À1 to 7.5 ng mL À1 .…”

Recent progress in materials used towards corrosion protection of Mg and its alloys

“…About 1.3 kg magnesium is founded in 1 m 3 of seawater (0.3%) [29]. Mg has better vibration and noise dampening properties than Al and shows excellent castability and good ductility [30][31][32]. By alloying magnesium with zirconium [33], zinc [34], thorium [35], manganese [36], aluminum [37], or rare earth metals [38], the ratio of strength to weight increases, making these materials suitable choices where lightweight and the reduction of inertial forces are required.…”