Direct observation of texture memory in hydrogenation–disproportionation–desorption–recombination processed Nd-Fe-B magnets using electron backscatter diffraction. (1st April 2016)

• Record Type: Journal Article
• Authors: Kim, Tae-Hoon; Oh, Jin-Su; Cha, Hee-Ryoung; Lee, Jung-Goo; Kwon, Hae-Woong; Yang, Cheol-Woong
• Is Part Of: Scripta materialia. Volume 115(2016)
• Page Start: 6
• Page End: 9
• Publication Date: 2016-04-01
• Subjects: Nd-Fe-B permanent magnets -- HDDR process -- Texture -- EBSD; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.12.023
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Memory of texture in hydrogenation–disproportionation–desorption–recombination (HDDR) processed NdFeB magnets was directly observed using electron backscatter diffraction (EBSD). By precise control of dynamic HDDR processing conditions, shape changes of samples were minimized by proper modifications of dimensions of samples subjected to HDDR treatment. EBSD analysis shows the preservation of texture before and after the HDDR process and biaxial texture in initial Nd2 Fe14 B grains after the dynamic HDDR treatment at a hydrogen pressure of 30 kPa. It is clearly demonstrated that the c-axis of initial Nd2 Fe14 B matches the c-axis of recombined Nd2 Fe14 B and it recovers after an anisotropic HDDR process. Graphical abstract: