Accession Number : ADA300223

Title :   Creep Damage Mechanisms in Composites,

Corporate Author : UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF MATERIALS SCIENCE AND E NGINEERING

Personal Author(s) : Nutt, S. R.

PDF Url : ADA300223

Report Date : 17 OCT 1994

Pagination or Media Count : 7

Abstract : During the past year, research has focused on processing and characterization of intermetallic composites synthesized by plasma spray deposition. This versatile process allows rapid synthesis of a variety of different composite systems with potential applications for coatings, functionally gradient materials, rapid proto-typing and 3d printing, as well as near-net-shape processing of complex shapes. We have been pursuing an experimental program of research aimed at a fundamental understanding of the microstructural processes involved in the synthesis of intermetallic composites, including diffusion, heat transfer, grain boundary migration, and the dependence of these phenomena on deposition parameters. The work has been motivated by issues arising from composite materials manufacturing technologies. Recent progress is described in section B on the following topics: (1) Reactive atomization and deposition of intermetallic composites (Ni3Al); (2) Reactive synthesis of MoSi2-SiC composites; (3) Mechanical alloying of nanocrystalline alloys; (4) Tensile creep deformation of BMAS glass-ceramic composites. (MM)

Descriptors :   *COMPOSITE MATERIALS, *CREEP, *NICKEL ALLOYS, *MOLYBDENUM ALLOYS, HEAT TRANSFER, MICROSTRUCTURE, MANUFACTURING, DISTRIBUTION, SYNTHESIS, DEFORMATION, DAMAGE ASSESSMENT, TENSILE PROPERTIES, CRYSTALLIZATION, GLASS, CERAMIC MATERIALS, MIGRATION, SILICON CARBIDES, PLASMA SPRAYING, GRAIN BOUNDARIES, INTERMETALLIC COMPOUNDS, ATOMIZATION.

Subject Categories : Laminates and Composite Materials
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE