Effect of Flake Thickness on Coercivity of Nanocrystalline SmCo5 Bulk Prepared from Anisotropic Nanoflake Powder (Postprint)

Abstract

In this study, nanocrystalline SmCo5 bulk magnets were prepared by hot-pressing of nanoflake powders fabricated via surfactant-assisted high energy ball milling. Effect of the flake thickness on magnetic coercivity of the SmCo5 bulk was investigated. Anisotropic SmCo5 nanoflakes with thickness between 100 and 1000 nm were prepared by varying the milling parameter of ball-to-powder weight ratio. XRD analysis revealed that as-milled flake powders possessed nanocrystalline grains with no observable oxide peaks. The coercivity of the flake powders varied between 19.9 and 21.3 kOe for 1000 nm to 100 nm thick flakes, which indicated that the flake thickness in this range had no obvious effect on the coercivity of the powders. However, the coercivity of the bulks showed a strong dependence on the flake thickness.

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Document Details

Document Type
Technical Report
Publication Date
Aug 23, 2016
Accession Number
AD1010899

Entities

People

  • Alexander O. Sheets
  • J. Horwath
  • Serhiy Leontsev
  • Yuhui Shen
  • Z. Turgut

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Coercivity
  • Crystal Structure
  • Domain Walls
  • Energy
  • Government Procurement
  • Governments
  • Grain Boundaries
  • Grain Growth
  • Heat Treatment
  • High Energy
  • Hot Pressing
  • Magnetic Fields
  • Magnetic Properties
  • Surface Active Substances

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.