Thermal-stress-driven enhancement of magnetic performance in electrical steel via aluminum titanate-modified insulating coatings

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Thin Solid Films Pub Date : 2026-03-01 Epub Date: 2026-02-11 DOI:10.1016/j.tsf.2026.140889

Meiqi Gao, Ruipeng Xu, Song Li

{"title":"Thermal-stress-driven enhancement of magnetic performance in electrical steel via aluminum titanate-modified insulating coatings","authors":"Meiqi Gao, Ruipeng Xu, Song Li","doi":"10.1016/j.tsf.2026.140889","DOIUrl":null,"url":null,"abstract":"<div><div>Minimizing energy losses in grain-oriented silicon steel (GOSS), a critical core material in transformers, is crucial for developing next-generation smart grid systems. Herein, we introduce aluminum titanate (AT) that has an ultralow coefficient of thermal expansion (CTE) into phosphate-based insulating coatings. This strategy is designed to engineer interfacial tensile stress, thereby refining magnetic domains in GOSS. At an optimal loading of 2.0 wt % AT, the coating achieves a remarkable reduction in iron loss (by 209.8 mW/kg) and an enhancement in magnetic flux density (by 95.97 mT). The magnetic performance enhancement is accompanied by a significant improvement in corrosion resistance. These enhancements are attributed to increased coating density and stress-induced domain refinement. However, an excessive AT content of 2.5 wt % leads to particle agglomeration and microcrack formation, which compromises both magnetic and electrochemical performance. This study presents a viable strategy for tailoring magnetic performance through ceramic modification, enabling the development of high-performance electrical steels.</div></div>","PeriodicalId":23182,"journal":{"name":"Thin Solid Films","volume":"837 ","pages":"Article 140889"},"PeriodicalIF":2.4000,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thin Solid Films","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0040609026000386","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/2/11 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"MATERIALS SCIENCE, COATINGS & FILMS","Score":null,"Total":0}

引用次数: 0

Abstract

Minimizing energy losses in grain-oriented silicon steel (GOSS), a critical core material in transformers, is crucial for developing next-generation smart grid systems. Herein, we introduce aluminum titanate (AT) that has an ultralow coefficient of thermal expansion (CTE) into phosphate-based insulating coatings. This strategy is designed to engineer interfacial tensile stress, thereby refining magnetic domains in GOSS. At an optimal loading of 2.0 wt % AT, the coating achieves a remarkable reduction in iron loss (by 209.8 mW/kg) and an enhancement in magnetic flux density (by 95.97 mT). The magnetic performance enhancement is accompanied by a significant improvement in corrosion resistance. These enhancements are attributed to increased coating density and stress-induced domain refinement. However, an excessive AT content of 2.5 wt % leads to particle agglomeration and microcrack formation, which compromises both magnetic and electrochemical performance. This study presents a viable strategy for tailoring magnetic performance through ceramic modification, enabling the development of high-performance electrical steels.

查看原文本刊更多论文

热应力驱动下钛酸铝改性绝缘涂层对电工钢磁性能的增强

晶粒取向硅钢（GOSS）是变压器的关键核心材料，最大限度地减少能量损失对于开发下一代智能电网系统至关重要。本文将具有超低热膨胀系数（CTE）的钛酸铝（AT）引入到磷酸盐基绝缘涂料中。该策略旨在设计界面拉伸应力，从而细化GOSS中的磁畴。在最佳负载2.0 wt % At时，涂层实现了铁损失的显著减少（209.8 mW/kg）和磁通密度的增强（95.97 mT）。磁性能的增强伴随着耐腐蚀性的显著改善。这些增强归功于涂层密度的增加和应力诱导的区域细化。然而，过量的AT含量为2.5 wt %会导致颗粒团聚和微裂纹的形成，从而影响磁性和电化学性能。本研究提出了一种可行的策略，通过陶瓷改性来定制磁性，从而实现高性能电工钢的开发。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Thin Solid Films 工程技术-材料科学：膜

CiteScore

4.00

自引率

4.80%

发文量

381

审稿时长

7.5 months

期刊介绍： Thin Solid Films is an international journal which serves scientists and engineers working in the fields of thin-film synthesis, characterization, and applications. The field of thin films, which can be defined as the confluence of materials science, surface science, and applied physics, has become an identifiable unified discipline of scientific endeavor.