Innovative processing of composites for ultra-high temperature applications. Book 1. Annual report

Technical Report · Mon Nov 01 04:00:00 EST 1993

OSTI ID:5090795

Abbaschian, R

The overall objective of this program was to provide a fundamental understanding of the processing science and technology necessary to fabricate ceramic-matrix, intermetallic-matrix, and metal-matrix composites with superior mechanical properties in high temperature and oxidizing environments. The composites are intended for use as structural materials for advanced aerospace applications at temperatures exceeding 1200 deg C (2200 deg F). In order to accomplish the program objective, interactive research groups were established in three key area of (a) Fiber Fabrication, (b) Coatings and Infiltration, and (c) Composite Fabrication. The objective of the fiber fabrication group was to develop new fibers which have superior strength and toughness at high temperatures and in oxidizing environments. The research effort focused on the development of two types of fibers: (1) glass-free mullite-based fibers, and (2) oxygen-free silicon carbide fibers. The coatings program had two primary objectives: (1) to control the characteristics of matrix/reinforcing phase interfaces (e.g., to control chemical reactions and bonding at a matrix/fiber interface) and (2) to develop coatings that will improve the oxidation resistance of metal-matrix and intermetallic-matrix composites. Coatings methods utilized included chemical vapor deposition, sol-gel processing, and solution coating with polymeric precursors to ceramics.

• Research Organization: Florida Univ., Gainesville, FL (United States). Dept. of Materials Science and Engineering
• OSTI ID: 5090795
• Report Number(s): AD-A-275597/3/XAB; CNN: N00014-91-J-4075
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ALLOYS
CARBIDES
CARBON COMPOUNDS
CERAMICS
COATINGS
COMPOSITE MATERIALS
DOCUMENT TYPES
FABRICATION
FIBERS
INORGANIC ION EXCHANGERS
INTERMETALLIC COMPOUNDS
ION EXCHANGE MATERIALS
MATERIALS
MATRIX MATERIALS
MINERALS
MULLITE
OXIDE MINERALS
PROGRESS REPORT
REINFORCED MATERIALS
RESEARCH PROGRAMS
SILICON CARBIDES
SILICON COMPOUNDS