Micro-XRF analysis of a Brazilian polychrome sculpture

Freitas, Renato Pereira de; Felix, Valter S.; Pereira, Marcelo O.; Santos, Ramon Silva dos; Oliveira, Ana Lúcia Crespo; Gonçalves, Elicardo A.S.; Ferreira, Douglas; Pimenta, Alexandre Dias; Pereira, Leandro de Oliveira; Anjos, M.J.

doi:10.1016/j.microc.2019.104020

Cited by 16 publications

(4 citation statements)

References 29 publications

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“…The LOI (loss on ignition) for both residues presented values above 40%. These minority components act as fluxes (lowering the melting temperature), stabilizers of the glass, and/or a vitrifying agent (glass network formers) [24].…”

Section: Resultsmentioning

confidence: 99%

Utilization of discarded foundry sand (DFS) and inorganic waste from cellulose and paper industry for the manufacture of glass-ceramic materials

Silva¹,

Magalhães

Macedo

et al. 2020

Cerâmica

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Recycling has been pointed out as an alternative to the disposal of waste materials in industrial landfills. In the present study, the transformation of residues (discarded foundry sand - DFS, grits, and lime mud) in glass-ceramic materials is shown. The glasses were obtained by the melting/cooling method. The precursor materials, glasses, and glass-ceramics were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), and differential scanning calorimetry/thermal gravimetric analysis (DSC/TGA). The glassy materials were milled, pelleted, and thermally treated at the crystallization temperatures given by DSC data to obtain the glass-ceramics (885, 961, and 1090 ºC). The main formed phases were cristobalite, α-wollastonite (parawollastonite), and β-wollastonite (pseudowollastonite). The glass-ceramics showed very low water absorption and apparent porosity (0.26 to 0.88 wt% and 0.66 to 1.77 vol%, respectively). The results confirmed that the studied residues can be used as raw materials for the manufacture of vitreous and glass-ceramic materials.

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Section: Resultsmentioning

confidence: 99%

Utilization of discarded foundry sand (DFS) and inorganic waste from cellulose and paper industry for the manufacture of glass-ceramic materials

Silva¹,

Magalhães

Macedo

et al. 2020

Cerâmica

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“…To identify the presence of manganese, the PyMCA program was used because only through the analysis of EDS through the Quantax program it was not possible to certify the existence or not of manganese, since the element is present in low alloy concentration and its primary peak overlaps the secondary one of chromium, and secondary to the iron primary, elements present in higher quantities and by PyMCA program, it can be built a multi-element calibration to determinate an specific element well-characterized in terms of precision extracting the spectra of arbitrary regions on the maps (Heginbotham and Solé, 2017;Felix, et al, 2018;Freitas, et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

Characterization of mechanical and surface finishing properties of metallic coating obtained by arc electric thermal spray

Campos

Cardoso

Furtado

et al. 2020

BJD

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The Brazilian thermoelectric plants that use coal as a thermal source use pulverized combustion technology. The aim of this work was to characterize some properties of a metallic coating obtained by arc electric thermal spray in order to protect boiler's surface against ash's aggressive action from coal burning. The evaluated parameters considerably influence the characteristics of the coating's lifes service. An iron chromium base alloy, reference herein as Alloy B, was used in this study. A chemical analysis of the coating, Alloy B, was performed in order to compare if there were any difference between the chemical composition of the wires used and what was incorporated into the coating by the thermal spray process. Therefore, Energy Dispersive Spectroscopy technique (EDS), Quantax software and PyMCA program were used. The chemical analisys results of the coating was quite similar to the given composition of the wires. To verify the coating hardness, Vickers (HV) microhardness measurements were performed on the coating region, on the substrate and on the boundary region of the coating between substrasts. Vickers microhardness measurements were obtained by PANTEC MV-1000A microdurometer. As substrate an 8 mm thick steel sheet with a chemical composition and thickness similar to the steels used in the water wall pipes of Brazilian boilers were used. The coating hardness (730 HV) was on the order of four times greater than the substrate's hardness (179 HV) to be protected. This property was homogeneous for the coated layer showing that hardness values indicates that good adhesion of coating's cast particles occurred, and the spray distance proved to be effective. The roughness was obtained through measurements made

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“…V. C. Braga et al, 2020;A. V. de C. Braga et al, 2019;Valter S. Felix et al, 2018;Valter Souza Felix et al, 2021;Freitas, Ribeiro, Calza, Oliveira, Silva, et al, 2016;Freitas et al, 2019;M. O. Pereira et al, 2021;Pimenta et al, 2020;I.…”

Section: Theoretical Foundationunclassified

Elementary analysis in banana samples using X-Ray Fluorescence

Pereira

Filho

Luiz

et al. 2021

RSD

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This work aims to characterize the elemental concentrations of two banana types gold and silver. In both were analyze in the pulp and peel by X-Ray Fluorescence technique. The results showed that the elements in both types are more concentrated in the peel than in the pulp. In addition, it was also observed that the normalization of the peel and pulp concentrations for the elements K, Fe, Zn, Br, Rb, and Sr is higher in the silver banana compared to the gold banana. The results indicate that banana peels can be used to supplement nutritional deficiencies. The work also demonstrates the potential that X-Ray Fluorescence has in investigation of elemental composition of foods. As the technique has easy instrumentation and data interpretation, it can be implemented as a routine in the investigation of the elemental composition of foods. In addition, the technique has the advantage of carrying out in situ analyzes by portable instruments. These in situ investigations can even be applied to make quality control of bananas at the time of harvest.

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Micro-XRF analysis of a Brazilian polychrome sculpture

Cited by 16 publications

References 29 publications

Utilization of discarded foundry sand (DFS) and inorganic waste from cellulose and paper industry for the manufacture of glass-ceramic materials

Utilization of discarded foundry sand (DFS) and inorganic waste from cellulose and paper industry for the manufacture of glass-ceramic materials

Characterization of mechanical and surface finishing properties of metallic coating obtained by arc electric thermal spray

Elementary analysis in banana samples using X-Ray Fluorescence

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