DEVELOPMENT OF COMPOSITE STRUCTURAL MATERIALS FOR HIGH TEMPERATURE APPLICATIONS

DEVELOPMENT OF COMPOSITE STRUCTURAL MATERIALS FOR HIGH TEMPERATURE APPLICATIONS

Studies were made of the feasibility of making whisher-reinforcement of metal composites for structural applications. The ultimate goal is a composite with a strength-to-density ratio of 600,000 in. at 2000 F. The growth of sapphire (Al2O3) whiskers was optimized to produce lengthto-diam ratios of 1...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SUTTON,W.H, TALENTO,A, CHORNE,J
Format: Report
Sprache:eng
Schlagworte:
ALUMINUM COMPOUNDS
CASTING
CERAMIC FIBERS
COMPOSITE MATERIALS
CRYSTALS
GROWTH(PHYSIOLOGY)
HIGH TEMPERATURE
MECHANICAL PROPERTIES
OXIDES
PROCESSING
REINFORCING MATERIALS
SAPPHIRE
SILVER
SYNTHESIS
TENSILE PROPERTIES
WIRE
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Beschreibung
Zusammenfassung:Studies were made of the feasibility of making whisher-reinforcement of metal composites for structural applications. The ultimate goal is a composite with a strength-to-density ratio of 600,000 in. at 2000 F. The growth of sapphire (Al2O3) whiskers was optimized to produce lengthto-diam ratios of 1000 or better. Studies are underway to improve the wettability and adherence between the sapphire whiskers and silver matrix. Wire specimens of silver, 0.030 in. in diam and reinforced with Al2O3 whiskers, were fabricated by centrifugal casting methods. This method yields composites of nearly 100% density, and results in greatly improved penetration of the silver into the whisker bundles, even though the latter were not metallized. (Author)