Influence of amorphous phase on coercivity in SmCo5-Cu nanocomposites

被引：7

作者：

Staab, Franziska ^{[1
]}

Yang, Yangyiwei ^{[2
]}

Foya, Eren ^{[2
]}

Bruder, Enrico ^{[1
]}

Zingsem, Benjamin ^{[3
,4
,5
,6
]}

Adabifiroozjaei, Esmaeil ^{[7
]}

Nasiou, Despoina ^{[7
]}

Skokov, Konstantin ^{[8
]}

Koch, David ^{[9
]}

Farle, Michael ^{[3
,4
]}

Dunin-Borkowski, Rafal E. ^{[5
,6
]}

Molina-Luna, Leopoldo

Gutfleisch, Oliver ^{[8
]}

Xu, Bai-Xiang ^{[2
]}

Durst, Karsten ^{[1
]}

机构：

[1] Tech Univ Darmstadt, Mat Sci Dept, Phys Met PhM, Peter Grunberg Str 2, D-64287 Darmstadt, Germany

[2] Tech Univ Darmstadt, Mat Sci Dept, Mech Funct Mat MFM, Otto Berndt Str 3, D-64287 Darmstadt, Germany

[3] Univ Duisburg Essen, Fac Phys, D-47057 Duisburg, Germany

[4] Univ Duisburg Essen, Ctr Nanointegrat CENIDE, D-47057 Duisburg, Germany

[5] Forschungszentrum Julich, Ernst Ruska Ctr Microscopy & Spect Electrons, D-52425 Julich, Germany

[6] Forschungszentrum Julich, Peter Grunberg Inst, D-52425 Julich, Germany

[7] Tech Univ Darmstadt, Mat Sci Dept, Adv Electron Microscopy AEM, Peter Grunberg Str 2, D-64287 Darmstadt, Germany

[8] Tech Univ Darmstadt, Mat Sci Dept, Funct Mat FM, Peter Grunberg Str 16, D-64287 Darmstadt, Germany

[9] Tech Univ Darmstadt, Mat Sci Dept, Struct Res, Peter Grunberg Str 2, D-64287 Darmstadt, Germany

来源：

SCRIPTA MATERIALIA | 2024年 / 240卷

基金：

欧盟地平线“2020”; 欧洲研究理事会;

关键词：

SmCo5-Cu nanocomposites; Severe plastic deformation; High-pressure torsion; Micromagnetic simulation; Amorphous SmCo5; MAGNETIZATION; SATURATION; MAGNETS;

D O I：

10.1016/j.scriptamat.2023.115808

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Severe plastic deformation of powder blends consisting of SmCo5-Cu results in magnetically hardened nanocomposite bulk materials. Previously it was reported that the microstructure is continuously refined with increasing deformation, yet, coercivity saturates at a certain level of strain and partial amorphization of the SmCo5 phase is observed. In this work larger strains, over the range of the previous work are applied showing further structural refinement but a strong decrease in coercivity. Micromagnetic simulations based on the experimentally observed microstructure serve to clarify the effect of amorphization in the SmCo5 phase and disclose the detrimental character of the amorphous phase. For a fixed volume fraction of nanocrystals the simulations reveal an increasing coercivity with decreasing the size of them due to increasing number of interfaces acting as pinning sites. Furthermore, our micromagnetic simulations disclose the mechanisms of saturation and decline of magnetic hardening due to the strain induced by high-pressure torsion

引用

页数：6

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