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Microstructure and properties analysis of the brazing alloy prepared from recycled E-waste

In order to realize the efficient and comprehensive utilization of e-waste resources and short process preparation of alloy brazing materials, this study has analyzed the microstructure and properties of e-waste recycled brazing alloys by the analysis methods of inductively coupled plasma emission s...

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Autores principales: Yang, Jiao, Bao, Li, Long, Weimin, Zhong, Sujuan, Qin, Jian, Qiao, Ruilin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9581399/
https://www.ncbi.nlm.nih.gov/pubmed/36277346
http://dx.doi.org/10.3389/fchem.2022.1038555
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author Yang, Jiao
Bao, Li
Long, Weimin
Zhong, Sujuan
Qin, Jian
Qiao, Ruilin
author_facet Yang, Jiao
Bao, Li
Long, Weimin
Zhong, Sujuan
Qin, Jian
Qiao, Ruilin
author_sort Yang, Jiao
collection PubMed
description In order to realize the efficient and comprehensive utilization of e-waste resources and short process preparation of alloy brazing materials, this study has analyzed the microstructure and properties of e-waste recycled brazing alloys by the analysis methods of inductively coupled plasma emission spectrometer, differential scanning calorimeter, scanning electron microscope, metalloscope, X-ray diffractometer, micro-hardness tester. Experimental results showed that phase compositions are significant differences between the alloys prepared by the recycled e-waste and the pure metals. The circuit board recycling alloy mainly consisted of α-Fe dendrites, (Cu, Sn) phases, Sn-rich phases and Cu matrix, while the alloy obtained by pure metals is composed of (Cu, Sn) phase, Sn-rich phase and Cu matrix. The melting temperature of alloy obtained by melting the circuit board is in the range of 985.3°C–1,053.0°C, which was wider and higher than that of alloy obtained by pure metal smelting. The shear strengths of the joints brazed by the brazing alloys prepared by the recycle e-waste and pure metals are 182.21 MPa and 277.02 MPa, respectively. There is little difference in hardness between the two types of brazed joints. In addition, there are a large number of precipitated phases in alloy obtained by the recycled circuit board, owing to the precipitation strengthening mechanism. The main strengthening mechanism of alloy obtained by pure metals is solid-solution strengthening. The paper focused primarily on alloy obtained by melting the circuit board and studying the specific composition, melting temperature, structure, and properties of alloys formed by melting the circuit board and pure metals. Meawhile, the size, morphology and other microstructure evolution of the second phase of brazing alloy were investigated to provide theoretical guidance for the brazing alloy in the subsequent actual production process.
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spelling pubmed-95813992022-10-20 Microstructure and properties analysis of the brazing alloy prepared from recycled E-waste Yang, Jiao Bao, Li Long, Weimin Zhong, Sujuan Qin, Jian Qiao, Ruilin Front Chem Chemistry In order to realize the efficient and comprehensive utilization of e-waste resources and short process preparation of alloy brazing materials, this study has analyzed the microstructure and properties of e-waste recycled brazing alloys by the analysis methods of inductively coupled plasma emission spectrometer, differential scanning calorimeter, scanning electron microscope, metalloscope, X-ray diffractometer, micro-hardness tester. Experimental results showed that phase compositions are significant differences between the alloys prepared by the recycled e-waste and the pure metals. The circuit board recycling alloy mainly consisted of α-Fe dendrites, (Cu, Sn) phases, Sn-rich phases and Cu matrix, while the alloy obtained by pure metals is composed of (Cu, Sn) phase, Sn-rich phase and Cu matrix. The melting temperature of alloy obtained by melting the circuit board is in the range of 985.3°C–1,053.0°C, which was wider and higher than that of alloy obtained by pure metal smelting. The shear strengths of the joints brazed by the brazing alloys prepared by the recycle e-waste and pure metals are 182.21 MPa and 277.02 MPa, respectively. There is little difference in hardness between the two types of brazed joints. In addition, there are a large number of precipitated phases in alloy obtained by the recycled circuit board, owing to the precipitation strengthening mechanism. The main strengthening mechanism of alloy obtained by pure metals is solid-solution strengthening. The paper focused primarily on alloy obtained by melting the circuit board and studying the specific composition, melting temperature, structure, and properties of alloys formed by melting the circuit board and pure metals. Meawhile, the size, morphology and other microstructure evolution of the second phase of brazing alloy were investigated to provide theoretical guidance for the brazing alloy in the subsequent actual production process. Frontiers Media S.A. 2022-10-05 /pmc/articles/PMC9581399/ /pubmed/36277346 http://dx.doi.org/10.3389/fchem.2022.1038555 Text en Copyright © 2022 Yang, Bao, Long, Zhong, Qin and Qiao. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Yang, Jiao
Bao, Li
Long, Weimin
Zhong, Sujuan
Qin, Jian
Qiao, Ruilin
Microstructure and properties analysis of the brazing alloy prepared from recycled E-waste
title Microstructure and properties analysis of the brazing alloy prepared from recycled E-waste
title_full Microstructure and properties analysis of the brazing alloy prepared from recycled E-waste
title_fullStr Microstructure and properties analysis of the brazing alloy prepared from recycled E-waste
title_full_unstemmed Microstructure and properties analysis of the brazing alloy prepared from recycled E-waste
title_short Microstructure and properties analysis of the brazing alloy prepared from recycled E-waste
title_sort microstructure and properties analysis of the brazing alloy prepared from recycled e-waste
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9581399/
https://www.ncbi.nlm.nih.gov/pubmed/36277346
http://dx.doi.org/10.3389/fchem.2022.1038555
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