Accession Number:

ADA517267

Title:

High Temperature Oxidation of Superalloys and Intermetallic Compounds

Descriptive Note:

Final rept. 1 Sep 2006-28 Feb 2010

Corporate Author:

CENTRO DE INVESTIGACION EN MATERIALES AVANZADOS S C CHIH (MEXICO)

Report Date:

2010-02-28

Pagination or Media Count:

97.0

Abstract:

Intermetallic aluminides are currently being considered for a variety of high temperature applications, i.e. gas turbine engines, fluidized bed combustors, in the aerospace, automotive and turbine power generation markets. Aircraft engine manufacturers are pursuing the implementation of these alloys in aircraft engines. This is because aluminides offer a possible combination of creep resistance and low density which is superior to that provided by state-of-the-art, coated superalloys. The long-range ordering in the lattice structure produces stronger bonding and closer packing between atoms mobility generally leads to slower diffusion processes and better creep resistance in ordered structure. Unlike conventional metallic alloys, the yield stress of most intermetallics increases substantially with the increasing temperature.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Metallurgy and Metallography
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE