机械磁性（FeCoNi）86Al4Cu3Ti7 HEAs的实现

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-04-04 DOI:10.1016/j.materresbull.2025.113476

Qun Zou , Bo Li , Jia-Yi Yin , Li-Long Zhu , Ge-Mei Cai

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引用次数: 0

摘要

在高熵合金（HEAs）中同时实现磁性能和机械强化是先进应用的关键，但仍然具有挑战性。我们提出了一种calphad引导的热机械策略，以（FeCoNi）86Al4Cu3Ti7 HEAs为模型系统，在FCC基体中可控地沉淀L12纳米颗粒。再结晶和时效试样均表现出优异的屈服强度（>1 GPa），同时保持相当大的延展性。与已有的HEAs相比，优化后的微观结构显示出优越的磁性能，为通过calphad定向相工程开发高性能磁性结构材料提供了可行的策略。

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Achieving mechanical-magnetic (FeCoNi)86Al4Cu3Ti7 HEAs

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Achieving mechanical-magnetic (FeCoNi)86Al4Cu3Ti7 HEAs

The simultaneous achievement of magnetic properties and mechanical strengthening in high entropy alloys (HEAs) is crucial for advanced applications but remains challenging. We present a CALPHAD-guided thermomechanical strategy to controllably precipitate L1₂ nanoparticles within FCC matrix, using (FeCoNi)₈₆Al₄Cu₃Ti₇ HEAs as a model system. Both recrystallization and aging specimens exhibit exceptional yield strengths (>1 GPa) while retaining considerable ductility. The optimized microstructure demonstrates superior magnetic properties compared to the reported HEAs, offering a feasible strategy for developing superior magnetic structural materials through CALPHAD-directed phase engineering.

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.