High-coercivity Sm2Fe17Nx powders produced by HDDR and nitriding processes

H. Nakamura; S. Sugimoto; M. Okada; M. Homma

doi:10.1016/0254-0584(92)90212-Q

High-coercivity Sm₂Fe₁₇N_x powders produced by HDDR and nitriding processes

H. Nakamura, S. Sugimoto, M. Okada, M. Homma

Research output: Contribution to journal › Review article › peer-review

26 Citations (Scopus)

Abstract

This paper describes the occurrence of HDDR (Hydrogenation Disproportionation Desorption Recombination or Hydrogen Decomposition Desorption Recombination) process in the processing of Sm₂Fe₁₇N_x powders with high coercivity. The hydrogen absorption and desorption behaviors of the Sm₂Fe₁₇ compound were studied. The Sm₂Fe₁₇ phase disproportionates into α-Fe and samarium hydrides after the heat treatment in hydrogen at around 600-1100 °C. The removal of hydrogen by following a heat treatment in vacuum so that desorption and recombination occur, results in the reforming of the Sm₂Fe₁₇ phase. This Sm₂Fe₁₇ phase has a cellular-like microstructure of about 50-500 nm in diameter. The nitrided Sm₂Fe₁₇ powders produced by the HDDR process at 775 °C have high coercivity of 8.7 kOe.

Original language	English
Pages (from-to)	280-285
Number of pages	6
Journal	Materials Chemistry and Physics
Volume	32
Issue number	3
DOIs	https://doi.org/10.1016/0254-0584(92)90212-Q
Publication status	Published - 1992 Oct

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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title = "High-coercivity Sm2Fe17Nx powders produced by HDDR and nitriding processes",

abstract = "This paper describes the occurrence of HDDR (Hydrogenation Disproportionation Desorption Recombination or Hydrogen Decomposition Desorption Recombination) process in the processing of Sm2Fe17Nx powders with high coercivity. The hydrogen absorption and desorption behaviors of the Sm2Fe17 compound were studied. The Sm2Fe17 phase disproportionates into α-Fe and samarium hydrides after the heat treatment in hydrogen at around 600-1100 °C. The removal of hydrogen by following a heat treatment in vacuum so that desorption and recombination occur, results in the reforming of the Sm2Fe17 phase. This Sm2Fe17 phase has a cellular-like microstructure of about 50-500 nm in diameter. The nitrided Sm2Fe17 powders produced by the HDDR process at 775 °C have high coercivity of 8.7 kOe.",

author = "H. Nakamura and S. Sugimoto and M. Okada and M. Homma",

year = "1992",

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T1 - High-coercivity Sm2Fe17Nx powders produced by HDDR and nitriding processes

AU - Nakamura, H.

AU - Sugimoto, S.

AU - Okada, M.

AU - Homma, M.

PY - 1992/10

Y1 - 1992/10

N2 - This paper describes the occurrence of HDDR (Hydrogenation Disproportionation Desorption Recombination or Hydrogen Decomposition Desorption Recombination) process in the processing of Sm2Fe17Nx powders with high coercivity. The hydrogen absorption and desorption behaviors of the Sm2Fe17 compound were studied. The Sm2Fe17 phase disproportionates into α-Fe and samarium hydrides after the heat treatment in hydrogen at around 600-1100 °C. The removal of hydrogen by following a heat treatment in vacuum so that desorption and recombination occur, results in the reforming of the Sm2Fe17 phase. This Sm2Fe17 phase has a cellular-like microstructure of about 50-500 nm in diameter. The nitrided Sm2Fe17 powders produced by the HDDR process at 775 °C have high coercivity of 8.7 kOe.

AB - This paper describes the occurrence of HDDR (Hydrogenation Disproportionation Desorption Recombination or Hydrogen Decomposition Desorption Recombination) process in the processing of Sm2Fe17Nx powders with high coercivity. The hydrogen absorption and desorption behaviors of the Sm2Fe17 compound were studied. The Sm2Fe17 phase disproportionates into α-Fe and samarium hydrides after the heat treatment in hydrogen at around 600-1100 °C. The removal of hydrogen by following a heat treatment in vacuum so that desorption and recombination occur, results in the reforming of the Sm2Fe17 phase. This Sm2Fe17 phase has a cellular-like microstructure of about 50-500 nm in diameter. The nitrided Sm2Fe17 powders produced by the HDDR process at 775 °C have high coercivity of 8.7 kOe.

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DO - 10.1016/0254-0584(92)90212-Q

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AN - SCOPUS:0026929499

SN - 0254-0584

VL - 32

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EP - 285

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 3

ER -

High-coercivity Sm₂Fe₁₇N_x powders produced by HDDR and nitriding processes

Abstract

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