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Understanding and Development of Pseudo Glass Film for Grain Oriented Electrical Steel / ASHLEY HILL

Swansea University Author: ASHLEY HILL

DOI (Published version): 10.23889/SUthesis.60116

Abstract

The mechanisms and the development of the surface oxide known as “Forsterite” during the high-temperature annealing process of electrical steel is not fully understood. Research has demonstrated that a uniform Forsterite layer develops at 1200oC and adding certain compounds to the magnesium slurry i...

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Published: Swansea 2022
Institution: Swansea University
Degree level: Doctoral
Degree name: EngD
Supervisor: Searle, Justin R.
URI: https://cronfa.swan.ac.uk/Record/cronfa60116
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first_indexed 2022-06-01T11:20:28Z
last_indexed 2022-06-02T03:33:00Z
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spelling 2022-06-01T12:30:45.6612592 v2 60116 2022-06-01 Understanding and Development of Pseudo Glass Film for Grain Oriented Electrical Steel 04e607442658b3dbe7f20c486707d088 ASHLEY HILL ASHLEY HILL true false 2022-06-01 The mechanisms and the development of the surface oxide known as “Forsterite” during the high-temperature annealing process of electrical steel is not fully understood. Research has demonstrated that a uniform Forsterite layer develops at 1200oC and adding certain compounds to the magnesium slurry improves consistency. This thesis investigates the development of Forsterite during the high-temperature coil annealing cycle and the effect of introducing selected compounds to the magnesium slurry on the Forsterite layer. Based on a literature review on the transition of Fayalite to Forsterite and the influence of high-temperature soak, an experiment was conducted on laboratory coated samples that were then heat-treated using a custom laboratory furnace. The heat treatment that was conducted was interrupted at various points during the heating phase and the high-temperature soak phase. An additional investigation into the effects of TiO2, V2O3 and FeO-Fe2O3 when added to the magnesium slurry has on Forsterite was also studied. The results indicate that magnesium-enriched surface is developed as early as 1050oC, and with the introduction of TiO2 to the magnesium slurry a Ti enriched region also develops at 1050oC as part of the surface oxide. Further research is needed to identify the compounds of the magnesium and titanium enriched regions. E-Thesis Swansea Grain oriented electrical steel, Glass film, Forsterite 27 5 2022 2022-05-27 10.23889/SUthesis.60116 COLLEGE NANME COLLEGE CODE Swansea University Searle, Justin R. Doctoral EngD EPSRC Doctoral training grant 2022-06-01T12:30:45.6612592 2022-06-01T12:18:02.3502984 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised ASHLEY HILL 1 60116__24211__2bcd75d5e7844d93b87e060ef7781e67.pdf Hill_Ashley_S_EngD_Thesis_Final_Redacted_Signature.pdf 2022-06-01T12:27:39.7497306 Output 15629068 application/pdf E-Thesis – open access true Copyright: The author, Ashley S. Hill, 2022. true eng
title Understanding and Development of Pseudo Glass Film for Grain Oriented Electrical Steel
spellingShingle Understanding and Development of Pseudo Glass Film for Grain Oriented Electrical Steel
ASHLEY HILL
title_short Understanding and Development of Pseudo Glass Film for Grain Oriented Electrical Steel
title_full Understanding and Development of Pseudo Glass Film for Grain Oriented Electrical Steel
title_fullStr Understanding and Development of Pseudo Glass Film for Grain Oriented Electrical Steel
title_full_unstemmed Understanding and Development of Pseudo Glass Film for Grain Oriented Electrical Steel
title_sort Understanding and Development of Pseudo Glass Film for Grain Oriented Electrical Steel
author_id_str_mv 04e607442658b3dbe7f20c486707d088
author_id_fullname_str_mv 04e607442658b3dbe7f20c486707d088_***_ASHLEY HILL
author ASHLEY HILL
author2 ASHLEY HILL
format E-Thesis
publishDate 2022
institution Swansea University
doi_str_mv 10.23889/SUthesis.60116
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
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description The mechanisms and the development of the surface oxide known as “Forsterite” during the high-temperature annealing process of electrical steel is not fully understood. Research has demonstrated that a uniform Forsterite layer develops at 1200oC and adding certain compounds to the magnesium slurry improves consistency. This thesis investigates the development of Forsterite during the high-temperature coil annealing cycle and the effect of introducing selected compounds to the magnesium slurry on the Forsterite layer. Based on a literature review on the transition of Fayalite to Forsterite and the influence of high-temperature soak, an experiment was conducted on laboratory coated samples that were then heat-treated using a custom laboratory furnace. The heat treatment that was conducted was interrupted at various points during the heating phase and the high-temperature soak phase. An additional investigation into the effects of TiO2, V2O3 and FeO-Fe2O3 when added to the magnesium slurry has on Forsterite was also studied. The results indicate that magnesium-enriched surface is developed as early as 1050oC, and with the introduction of TiO2 to the magnesium slurry a Ti enriched region also develops at 1050oC as part of the surface oxide. Further research is needed to identify the compounds of the magnesium and titanium enriched regions.
published_date 2022-05-27T04:17:57Z
_version_ 1763754196592492544
score 11.036006

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