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- Title
Superior zero thermal expansion dual-phase alloy via boron-migration mediated solid-state reaction.
- Authors
Yu, Chengyi; Lin, Kun; Chen, Xin; Jiang, Suihe; Cao, Yili; Li, Wenjie; Chen, Liang; An, Ke; Chen, Yan; Yu, Dunji; Kato, Kenichi; Zhang, Qinghua; Gu, Lin; You, Li; Kuang, Xiaojun; Wu, Hui; Li, Qiang; Deng, Jinxia; Xing, Xianran
- Abstract
Rapid progress in modern technologies demands zero thermal expansion (ZTE) materials with multi-property profiles to withstand harsh service conditions. Thus far, the majority of documented ZTE materials have shortcomings in different aspects that limit their practical utilization. Here, we report on a superior isotropic ZTE alloy with collective properties regarding wide operating temperature windows, high strength-stiffness, and cyclic thermal stability. A boron-migration-mediated solid-state reaction (BMSR) constructs a salient "plum pudding" structure in a dual-phase Er-Fe-B alloy, where the precursor ErFe10 phase reacts with the migrated boron and transforms into the target Er2Fe14B (pudding) and α-Fe phases (plum). The formation of such microstructure helps to eliminate apparent crystallographic texture, tailor and form isotropic ZTE, and simultaneously enhance the strength and toughness of the alloy. These findings suggest a promising design paradigm for comprehensive performance ZTE alloys. Zero thermal expansion (ZTE) alloys with multi-properties are important for high-precision applications, but scarce. Here the authors incorporate a boron-migration-mediated solid-state reaction to construct a dual-phase ZTE alloy with enhanced mechanical properties and cyclic thermal stabilities.
- Subjects
ZTE Corp.; THERMAL expansion; DUAL-phase steel; CRYSTAL texture; THERMAL stability; MECHANICAL alloying; THERMAL properties
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-38929-0