Study of Metastable Alloy Phases by Diffraction Techniques Based on High-Resolution Energy Counters.

Abstract

This report summarizes the results obtained in a study of metastable alloys produced by ultra-rapid quenching from the melt (splat cooling). The crystal structures of new metastable phases were determined by X-ray powder diffractometry; the energy dispersive diffraction technique originally intended for use in this work was evaluated and improved but found to be less powerful for the present purpose than angular dispersive diffractometry. Results in six main areas are listed: (1) B-metal alloys, including the Sn-Tl, Hg-In, Hg-Tl and Pb-Sn systems and Ga phases with In and Sn; (2) Ge alloy phases with Fe, especially a vacancy-stabilized CsCl type Ge-Fe phase connecting with six-coordinated metastable Ge(Fe); (3) A review of the splat cooling process; (4) Structures of the equilibrium phases AuPb3, Cr5Si3Cx, and 5 ternary M phases; (5) Use of energy dispersive counters for X-ray diffraction work; (6) Structures of metastable alloys at high pressures. (Modified author abstract)

Document Details

Document Type
Technical Report
Publication Date
Aug 30, 1974
Accession Number
AD0787521

Entities

People

  • Bill C. Gleasen

Organizations

  • Northeastern University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Alloys
  • Crystal Structure
  • Crystals
  • Diffraction
  • High Pressure
  • High Resolution
  • Metastable Alloys
  • Quenching
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

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