Accession Number:

ADA275598

Title:

Innovative Processing of Composites for Ultra-High Temperature Applications. Book 2

Descriptive Note:

Annual rept.,

Corporate Author:

FLORIDA UNIV GAINESVILLE DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s):

Report Date:

1993-11-01

Pagination or Media Count:

154.0

Abstract:

The overall objective of this program is to develop intermetallic- matrix composites for structural application above 1200 deg C. The development of intermetallic-matrix composites is motivated by their inherent useful properties such as excellent oxidation resistance, high melting points and relatively low densities. The main disadvantages of intermetallics are poor fracture toughness at ambient temperature and low creep resistance and strength at high temperatures. It is expected that their inherent advantages can be effectively utilized via artificial compositing. The approaches used are to improve fracture toughness via ductile phase toughening, and to increase the creep resistance and strength via high strength ceramic reinforcements such as SiC whiskers. Two classes of alloys have been selected for investigation 1 molybdenum disilicide MoSl2, and 2 Nb-based aluminides with the major focus on NbAl3.

Subject Categories:

  • Laminates and Composite Materials
  • Properties of Metals and Alloys
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE