Aluminum alloy containing zeolite was analyzed by using nanosecond and femtosecond laser-induced
breakdown spectroscopy (ns and fs-LIBS). The results reveal that Laser parameters, target physical properties, and
ambient conditions affect the laser ablation process. The aluminum silicate minerals present in the alloy under
investigation enable material volume expansion under compression. In laser interaction with this alloy, it has been
observed that the crater depth decreases with the increase of the surface hardness. In ns –LIBS, it is noted that the
ablation speed decreases with time and suddenly decreases with less sharp slope and after that the ablation speed
increases slightly. In additional the results show the vanishing and reform of the crater rim with the increase of ablation
time. Furthermore, a comparison between ns and fs-LIBS analysis has been done. Ns-LIBS analysis reveals that both
spectra intensity and lines detection are significantly influenced by the ambient conditions. However in fs-LIBS, the
ambient conditions affect the presented lines amplitude and width with the same effect on all lines.
The presence of natural radionuclides in raw materials used in cement manufacturing was determined by using analytical methods. The used Raw materials are limestone, clay, slag, and gypsum, which be used with different concentrations in cement production. Different analytical techniques such as Laser Induced Breakdown Spectroscopy (LIBS) technique, Gamma spectroscopy, Inductively Coupled Plasma (ICP) spectroscopy, X-ray fluorescence spectroscopy (XRF), in addition to X-Ray Diffraction (XRD) for phase identification of a crystalline material. The obtained data show that there is no significant radiological hazards arising from using the present cement components in the different applications. XRD data shows that there is no crystalline structures in the raw materials.
Laser-induced breakdown spectroscopy (LIBS) has been used to study the surface hardness of special aluminum alloys containing zeolite. The aluminum alloy has acquired pronounced changes in its metallurgical properties due to the zeolite inclusion. The surface hardness of the samples under investigation is determined by measuring the spectral intensity ratios of the ionic to atomic spectral lines in the LIBS spectra of samples having different surface hardness values that have been conventionally measured before for comparison. The presence of aluminum silicate mineral in the studied alloys enabled material volume to expand under compression. This feature gave new results in the measurement of hardness via LIBS. It has been proven that the trend of the alloy density change complies with the increase of ionic to atomic spectral line intensity ratio.
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