FIRST AND SECOND ORDER PHASE CHANGES IN SPLAT COOLED Au-Cd AND Au-Zn ALLOYS.

Abstract

X-ray diffraction, transmission electron microscopy and selected area electron diffraction studies were performed on splat cooled equi-atomic Au-Cd and Au-Zn alloys. A vertical shock-tube apparatus is used for splat quenching samples from various temperatures. A substantial increase in superlattice line intensities were observed for both alloys after splat cooling. This result was tentatively interpreted in terms of the formation of preferential sublattice vacancies. A new morphology and crystal structure of the martensitic phase in splat cooled Au-Cd alloy were observed and a periodically faulted martensite like phase was observed in a splat cooled 50 at.% Au-Zn alloy. Also observed in the splat cooled Au-Zn alloy was a hitherto unreported modulated structure. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1969
Accession Number
AD0710807

Entities

People

  • K Mukherjee
  • L. S. Castleman
  • Paul Ferraglio

Tags

DTIC Thesaurus Topics

  • Alloys
  • Crystal Structure
  • Crystals
  • Diffraction
  • Electron Diffraction
  • Electron Microscopy
  • Electrons
  • Microscopy
  • Shock Tubes
  • Superlattices
  • Transmission Electron Microscopy
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

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

Technology Areas

  • Microelectronics