高圧焼結法によるＭｇ‐Ｆｅ‐Ｏ酸化物フェライト／磁性金属系複合材料の作製

• 藤村 研悟

  同志社大学理工学部機能分子・生命化学科

• 加藤 将樹

  同志社大学理工学部機能分子・生命化学科

• 廣田 健

  同志社大学理工学部機能分子・生命化学科

書誌事項

タイトル別名

• Fabrication of Mg-Fe-O Ferrite/magnetic Metal Bulk Composites by High-pressure Sintering
• 高圧焼結法によるMg-Fe-O酸化物フェライト/磁性金属系複合材料の作製
• コウアツ ショウケツホウ ニ ヨル Mg Fe O サンカブツ フェライト ジセイ キンゾクケイ フクゴウ ザイリョウ ノ サクセイ

抄録

Fabrication of MgFe₂O₄/Fe-Ni alloy bulk composites, in which Fe-Ni grains (∼5 μm in diameter) are fully surrounded with thin MgFe₂O₄ layer (∼0.3 μm in thick), has been tried by adopting high-pressure sintering for two powders: "Composite Powder I" and "Composite Powder II". The former was prepared as follows; fine MgO particle-coated Fe-Ni powders were heat-treated under various oxygen partial pressures at 600° and 700°C. The latter was fine MgO+α-Fe₂O₃ mixed powder particles-coated Fe-Ni powders. For the composite powders, two sintering processes were tried; i.e., pulsed-electric current pressure sintering PECPS (800°C/30 MPa/3 min) and HIP (950°-1250°C/196 MPa/2 h). Phase identification by XRD and SEM observations revealed that dense microstructure consisting of two phases (spinel MgFe₂O₄ and Fe-Ni alloy) was attained from the combination of composite powders II, PECPS and a re-oxidation process. However, other process resulted in formation of Wüsteit phase of Mg_1-xFe_xO and FeO in addition to Fe-Ni due to highly reductive atmosphere during the sintering. Thus obtained composite materials consisting two phases showed good magnetic properties at room temperature as expected from their compositions and microstructures: saturation magnetization density B_s of 1.20 T, and permeability μ∼15-30 at 1 MHz, and a Curie point above 460°C.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 55 (9), 629-636, 2008

  一般社団法人 粉体粉末冶金協会

キーワード

• magnesium ferrite
• permalloy
• composites
• pulsed-electric current pressure sintering (PECPS)
• hot isostatic pressing (HIP)
• magnetic properties

詳細情報

• CRID: 1390282681285696256
• NII論文ID: 10024350841
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.55.629
• COI: 1:CAS:528:DC%2BD1cXhtFKru7rM
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 9660468
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9660468
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可