Fiber-matrix reactions during manufacturing of gamma-TiAl based intermetallic matrix composites

Conference · Sat Dec 30 23:00:00 EST 1995

OSTI ID:225138

Juengling, T; Kieback, B ^[1]; Glatz, W ^[2]; Clemens, H ^[3]

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1. Fraunhofer-Inst. fuer Angewandte Materialforschung-Aussenstelle Dresden (Germany)
2. Montanuniversitaet, Leoben (Austria). Inst. fuer Metallkunde und Werkstoffpruefung
3. Plansee Aktiengesellschaft, Reutte (Austria)

Two different procedures for bonding SiC- and Al{sub 2}O{sub 3}-fibers to {gamma}-TiAl based matrices are compared. The first procedure starts from elemental Ti-Al powder foils. During encapsulated hot isostatic pressing of foil-fiber-foil laminates the intermetallic matrix forms and the fibers are bonded to the matrix simultaneously. Bonding of SiC-fibers results in a strong sequence of carbides and suicides between fiber and matrix. In comparison Al{sub 2}O{sub 3}-fibers do not show significant reactions but may embrittle the matrix by oxygen diffusion. The second procedure starts from {gamma}-TiAl based sheets which are rolled from cast and subsequently forged prematerial. Fibers can be bonded to rolled TiAl sheets by hot pressing. In this case no reactions between SiC-fibers and the matrix occurred due to a lower bonding temperature.

• OSTI ID: 225138
• Report Number(s): CONF-950201--; ISBN 0-87339-304-X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ALUMINIUM OXIDES
ANNEALING
BONDING
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COMPOSITE MATERIALS
FABRICATION
HOT PRESSING
INTERFACES
INTERMETALLIC COMPOUNDS
OPTICAL MICROSCOPY
POWDERS
ROLLING
SCANNING ELECTRON MICROSCOPY
SILICON CARBIDES
TEMPERATURE DEPENDENCE
TITANIUM ALLOYS