1990
DOI: 10.1109/20.104826
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On the oxygen stabilized Nd-rich phase in the Nd-Fe-B (-O) permanent magnet system

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Cited by 25 publications
(8 citation statements)
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“…2(a) shows a series of selected area electron diffraction (SAD) patterns tilted from an Nd-rich phase. These strong and weak diffraction patterns have been suggested to arise from FCC-NdO and BCC-Nd 2 O 3 [5,6]. In contrast, TEM work by Chou et al [7] and by the present authors showed the dark field images were bright in the whole Ndrich phase, and therefore it ruled out of the possibility of two phases.…”
Section: Nd-rich Phasecontrasting
confidence: 52%
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“…2(a) shows a series of selected area electron diffraction (SAD) patterns tilted from an Nd-rich phase. These strong and weak diffraction patterns have been suggested to arise from FCC-NdO and BCC-Nd 2 O 3 [5,6]. In contrast, TEM work by Chou et al [7] and by the present authors showed the dark field images were bright in the whole Ndrich phase, and therefore it ruled out of the possibility of two phases.…”
Section: Nd-rich Phasecontrasting
confidence: 52%
“…Fidler [3] observed an Nd-rich phase having a double hexagonal structure (so-called DHCPNd 2 O 3 ) in sintered magnets. After annealing at 1080 1C for 50 min, the DHCP phase would transform to an FCC NdO phase (NaCl prototype) [4] at O40.57 at% [5]. Under electron irradiation, the fundamental FCC patterns of NdO phase were superimposed by weak reflections.…”
Section: Introductionmentioning
confidence: 99%
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“…[2][3][4][5][6][7][8][9][10][11][12][13] Most of the literature shows that oxide of fcc structure exists in a so-called Nd-rich phase in the grain boundaries. Nd-Fe-B sintered magnets are thought to have typical nucleation type coercivity mechanisms, as indicated by their initial magnetization curve.…”
Section: Introductionmentioning
confidence: 99%
“…Previous studies have shown that the coercivity of Nd-Fe-B sintered magnets was structure sensitive and dependent on the distribution of Nd-rich phases [3], the distribution of misaligned grains [4], average grain size and size distribution [5]. It has been known that heat-treatment processes greatly affect the structure of the sintered magnet [6][7][8], in particular on the distribution of Nd-rich phases.…”
Section: Introductionmentioning
confidence: 99%