Combustion synthesis of TiAl-matrix composites in the Ti-Al-BN system

Journal Article · Sun Jan 15 04:00:00 EST 1995 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/S0956-716X(99)80046-6· OSTI ID:6542417

Mabuchi, H; Tsuda, H; Nakayama, Y ^[1]

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1. Univ. of Osaka Prefecture, Osaka (Japan). Dept. of Metallurgy and Materials Science

The intermetallic compound TiAl has attracted much attention for its potential use as a structural high-temperature material. However, its use has been limited because of its negligible low-temperature ductility and fracture toughness and low high-temperature strength and creep. To improve these properties, recently this compound has been made as a composite material containing a secondary phase such as boride, carbide, nitride, or oxide. Recently, combustion synthesis or self-propagating, high-temperature synthesis (SHS) using powder compacts has been developed to produce intermetallics or ceramics. It is also possible to form intermetallic-intermetallic, intermetallic-ceramic, or ceramic-ceramic composites from combustion reactions between corresponding elemental constituents. It has the advantage of an in-situ forming technique compared with conventional artificial composite production approaches. In the previous studies using elemental powders, combustion reaction was carried out to form intermetallic-ceramic composites in the Ti-Al-C, or Ti-Al-N system. The compacts of Ti and Al powders with carbon powder or in gaseous nitrogen reacted exothermically, and formed a mixture product which had a fine distribution of the Ti[sub 2]AlC or Ti[sub 2]AlN particles in the matrix TiAl with a small amount of Ti[sub 3]Al. The processing technique, therefore, is of interest as a combustion reaction synthesis to make in-situ intermetallic-based composite materials. In the present work, to investigate the effect of BN addition on the reaction of Ti And Al powder mixtures, combustion synthesis of TiAl-matrix composites has been performed for the Ti-Al-BN system.

• OSTI ID: 6542417
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 32:2; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ALLOYS
ALUMINIUM ALLOYS
BORIDES
BORON COMPOUNDS
BORON NITRIDES
COMPOSITE MATERIALS
DATA
EXPERIMENTAL DATA
HEAT RESISTANT MATERIALS
INFORMATION
MATERIALS
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
PNICTIDES
PORE STRUCTURE
SYNTHESIS
TITANIUM ALLOYS
TITANIUM BORIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS