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Insight into Structural Changes and Electrochemical Properties of Spark Plasma Sintered Nanostructured Ferritic and Austenitic Stainless Steels
Nanostructured ferritic (Fe((82−x))-Cr(18)-Si(x), x = 0–3 wt %) and austenitic (Fe((73−x))-Cr(18)-Ni(9)-Six, x = 0–3 wt %) stainless steel (SS) alloys were developed by mechanical alloying (MA) and spark plasma sintering (SPS). The unit cell parameter estimated from X-ray diffraction spectra exhibit...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9002397/ https://www.ncbi.nlm.nih.gov/pubmed/35407343 http://dx.doi.org/10.3390/nano12071225 |
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author | Ahmed, Junaid Toor, Ihsan-ul-Haq Hussein, Mohamed A. Al-Aqeeli, Nasser Baig, Mirza M. A. |
author_facet | Ahmed, Junaid Toor, Ihsan-ul-Haq Hussein, Mohamed A. Al-Aqeeli, Nasser Baig, Mirza M. A. |
author_sort | Ahmed, Junaid |
collection | PubMed |
description | Nanostructured ferritic (Fe((82−x))-Cr(18)-Si(x), x = 0–3 wt %) and austenitic (Fe((73−x))-Cr(18)-Ni(9)-Six, x = 0–3 wt %) stainless steel (SS) alloys were developed by mechanical alloying (MA) and spark plasma sintering (SPS). The unit cell parameter estimated from X-ray diffraction spectra exhibited a decreasing trend with an increase in wt % of Si content in both alloy systems. The particle size of powders estimated using bright field transmission electron microscopy images for ferritic (3 wt % Si) and austenitic (3 wt % Si) SS powders was found to be 65 ± 5 nm and 18 ± 3 nm, respectively. In case of the ferritic system, 3 wt % Si exhibited the highest densification (~98%) and micro-hardness of about 350.6 ± 11.2 HV, respectively. Similarly, for the austenitic system (3 wt % Si), maximum densification and micro-hardness values were about 99% and 476.6 ± 15.2 HV, respectively. Comparative analysis of potentiodynamic polarization, linear polarization, and electrochemical impedance spectroscopy results indicates an increase in electrochemical performance of both alloy systems as the wt % Si was increased. The increase in electrochemical performance is directly related to the increase in densification owing to Si addition in these alloys. |
format | Online Article Text |
id | pubmed-9002397 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-90023972022-04-13 Insight into Structural Changes and Electrochemical Properties of Spark Plasma Sintered Nanostructured Ferritic and Austenitic Stainless Steels Ahmed, Junaid Toor, Ihsan-ul-Haq Hussein, Mohamed A. Al-Aqeeli, Nasser Baig, Mirza M. A. Nanomaterials (Basel) Article Nanostructured ferritic (Fe((82−x))-Cr(18)-Si(x), x = 0–3 wt %) and austenitic (Fe((73−x))-Cr(18)-Ni(9)-Six, x = 0–3 wt %) stainless steel (SS) alloys were developed by mechanical alloying (MA) and spark plasma sintering (SPS). The unit cell parameter estimated from X-ray diffraction spectra exhibited a decreasing trend with an increase in wt % of Si content in both alloy systems. The particle size of powders estimated using bright field transmission electron microscopy images for ferritic (3 wt % Si) and austenitic (3 wt % Si) SS powders was found to be 65 ± 5 nm and 18 ± 3 nm, respectively. In case of the ferritic system, 3 wt % Si exhibited the highest densification (~98%) and micro-hardness of about 350.6 ± 11.2 HV, respectively. Similarly, for the austenitic system (3 wt % Si), maximum densification and micro-hardness values were about 99% and 476.6 ± 15.2 HV, respectively. Comparative analysis of potentiodynamic polarization, linear polarization, and electrochemical impedance spectroscopy results indicates an increase in electrochemical performance of both alloy systems as the wt % Si was increased. The increase in electrochemical performance is directly related to the increase in densification owing to Si addition in these alloys. MDPI 2022-04-05 /pmc/articles/PMC9002397/ /pubmed/35407343 http://dx.doi.org/10.3390/nano12071225 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ahmed, Junaid Toor, Ihsan-ul-Haq Hussein, Mohamed A. Al-Aqeeli, Nasser Baig, Mirza M. A. Insight into Structural Changes and Electrochemical Properties of Spark Plasma Sintered Nanostructured Ferritic and Austenitic Stainless Steels |
title | Insight into Structural Changes and Electrochemical Properties of Spark Plasma Sintered Nanostructured Ferritic and Austenitic Stainless Steels |
title_full | Insight into Structural Changes and Electrochemical Properties of Spark Plasma Sintered Nanostructured Ferritic and Austenitic Stainless Steels |
title_fullStr | Insight into Structural Changes and Electrochemical Properties of Spark Plasma Sintered Nanostructured Ferritic and Austenitic Stainless Steels |
title_full_unstemmed | Insight into Structural Changes and Electrochemical Properties of Spark Plasma Sintered Nanostructured Ferritic and Austenitic Stainless Steels |
title_short | Insight into Structural Changes and Electrochemical Properties of Spark Plasma Sintered Nanostructured Ferritic and Austenitic Stainless Steels |
title_sort | insight into structural changes and electrochemical properties of spark plasma sintered nanostructured ferritic and austenitic stainless steels |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9002397/ https://www.ncbi.nlm.nih.gov/pubmed/35407343 http://dx.doi.org/10.3390/nano12071225 |
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