Formation, Mechanical and Electrical Properties of Ni-based Amorphous Alloys and their Nanocrystalline Structure

Abstract

A Ni-based amorphous alloy in Ni60Ti20Zr20 system was prepared by melting spinning. The glass transition temperature (Tg) was high as about 760 K, the supercooled liquid region was quite wide, DELTAT(x) = 50 K (DELTATx = T(x)-T(g), T(x) crystallization temperature), and the reduced glass transition temperature (T(g)/T(m)) was 0.60. The amorphous alloys exhibited a high tensile strength (sigma(f) = 1015 MPa) at room temperature. The electrical conductivity obeyed a T(exp 1/2) law over the range of 15 K< T <300 K, which can be explained by an electron-electron interaction model. After annealing the amorphous alloy into primary crystallization, a nanocomposites consisted of metastable Ti2Ni and Zr2Ni nanophases with size less than 15 nm embedded in the amorphous matrix was appeared.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2003
Accession Number
ADP014286

Entities

People

  • Tiemin Zhao
  • Xiangcheng Sun

Organizations

  • University of Alabama

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Binary Alloys
  • Diffraction
  • Electrical Conductivity
  • Electrical Properties
  • Electron Diffraction
  • Electron Microscopy
  • Glass
  • Glass Transition Temperature
  • Materials
  • Materials Science
  • Mechanical Properties
  • Nanomaterials
  • Physical Properties
  • Scanning Electron Microscopy
  • Stress Strain Relations
  • Transition Temperature
  • Transitions

Fields of Study

  • Materials science

Readers

  • Plasma Physics / Magnetohydrodynamics
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene