“…There are far fewer reports on magnetic nanocrystalline alloys, oxides, and nitrides prepared by HPT. However, the HPT processing of magnetic materials has attracted increasing research interests for the high efficiency of HPT in producing ultra-fine grain size, which is crucial for tuning the magnetic properties of the magnetic materials [ 11 , 12 , 13 ]. This review presents a summary of the background and the recent developments of the magnetic materials processed by HPT.…”
High-pressure torsion (HPT) is a severe plastic deformation technique where a sample is subjected to torsional shear straining under a high hydrostatic pressure. The HPT method is usually employed to create ultrafine-grained nano-structures, making it widely used in processing many kinds of materials such as metals, glasses, biological materials, and organic compounds. Most of the published HPT results have been focused on the microstructural development of non-magnetic materials and their influence on the mechanical properties. The HPT processing of magnetic materials and its influence on the structural and magnetic properties have attracted increasing research interest recently. This review describes the application of HPT to magnetic materials and our recent experimental results on Mn3O4, Mn4N, and MnAl-based alloys. After HPT, most magnetic materials exhibit significantly reduced grain size and substantially enhanced coercivity.
“…There are far fewer reports on magnetic nanocrystalline alloys, oxides, and nitrides prepared by HPT. However, the HPT processing of magnetic materials has attracted increasing research interests for the high efficiency of HPT in producing ultra-fine grain size, which is crucial for tuning the magnetic properties of the magnetic materials [ 11 , 12 , 13 ]. This review presents a summary of the background and the recent developments of the magnetic materials processed by HPT.…”
High-pressure torsion (HPT) is a severe plastic deformation technique where a sample is subjected to torsional shear straining under a high hydrostatic pressure. The HPT method is usually employed to create ultrafine-grained nano-structures, making it widely used in processing many kinds of materials such as metals, glasses, biological materials, and organic compounds. Most of the published HPT results have been focused on the microstructural development of non-magnetic materials and their influence on the mechanical properties. The HPT processing of magnetic materials and its influence on the structural and magnetic properties have attracted increasing research interest recently. This review describes the application of HPT to magnetic materials and our recent experimental results on Mn3O4, Mn4N, and MnAl-based alloys. After HPT, most magnetic materials exhibit significantly reduced grain size and substantially enhanced coercivity.
“…Controversially, additive V particles in the ordered bcc phase (α-phase) have been found to have a slight detrimental effect in the magnetic moment in FeCo-V alloys [29,30].…”
Section: Ternary Additions In Feco Alloysmentioning
This thesis contains material from three papers published in the following peer-reviewed journal in which I am listed as an author.Chapter 4 is published as M. Muralles, J. T. Oh, and Z. Chen. Molecular Dynamics Study of FeCo Phase Transitions and Thermal Properties Based on an Improved 2NN MEAM
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