Research with in-situ Composites Aligned with Eutectoid and Eutectic Transformations.

Abstract

Directionally aligned eutectoids are of potential interest for high temperature turbine applications. The Hf-HfCr2 eutectoid was selected from several systems, to explore the potential of using solid-solid transformation to yield a suitable, aligned microstructure. A series of Ni-TaC alloys and a Ni(Cr)-Ni3Al-Ni3Nb alloy have been examined in oxidation. Numerous effects dependent on microstructures, chemistry, and oxidation temperature were observed. Chemical vapor deposition (CVD) techniques were used to deposit simple and complex layers of the elements Ni, Cr, and Al required for high temperature, oxidation resistant coatings. This work demonstrated the feasibility of depositing sequential layers.

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1975
Accession Number
ADA021530

Entities

People

  • J. G. Smeggil

Organizations

  • General Electric

Tags

DTIC Thesaurus Topics

  • Chemical Vapor Deposition
  • Chemistry
  • Coatings
  • Composite Materials
  • Engineering
  • High Temperature
  • Materials
  • Materials Engineering
  • Materials Processing
  • Materials Science
  • Microstructure
  • Oxidation
  • Vapor Deposition

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Nanocomposite Materials Science
  • Surface Engineering/Surface Coating Technology.