Precipitation of Ordered Phases in Metallic Solid Solutions: A Synergistic Clustering and Ordering Process (Preprint)

Abstract

The precipitation mechanism of ordered phases in metallic solid solutions has been a long-standing controversy due to the competing roles of chemical clustering (or phase separation) and chemical ordering. In the present study, this controversy has been resolved through the coupled use of aberration-corrected high-resolution scanning transmission electron microscopy and atom probe tomography. Thus, the experimental results, obtained at atomic resolution, can be interpreted satisfactorily only on the basis of phase separation via spinodal decomposition followed by chemical ordering.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2011
Accession Number
ADA548749

Entities

People

  • Anupama Singh
  • G. B. Viswanathan
  • H.L. Fraser
  • Jaimie Tiley
  • R. Banerjee
  • S. Nag

Organizations

  • University of North Texas

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Clustering
  • Crystal Structure
  • Decomposition
  • Electron Microscopes
  • Electron Microscopy
  • High Resolution
  • Materials
  • Materials Science
  • Microscopy
  • Phase
  • Phase Separation
  • Precipitation
  • Solid Solutions
  • Spinodal Decomposition
  • Transmission Electron Microscopy

Readers

  • Materials Science and Engineering.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene