In Situ Ductile Toughening of Nb sub 2 Al by Combustion Synthesis

Ductile toughening of niobium aluminide (Nb sub 2 Al) has been accomplished in situ while combustion synthesizing the compound from a mixture of Nb, Al, and 3 wt.% B powders. An enhancement of the fracture toughness of the resulting Nb sub 2 Al has been shown to be primarily caused by the interactio...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1992-06, Vol.75 (6), p.1678-1681
Main Author: Bhattacharya, A K
Format: Article
Language:English
Subjects:
360101 - Metals & Alloys- Preparation & Fabrication
360102 - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties
360104 - Metals & Alloys- Physical Properties
ALLOYS
ALUMINIUM ALLOYS
CRACK PROPAGATION
DUCTILITY
FABRICATION
FRACTURE PROPERTIES
HEAT TREATMENTS
MATERIALS SCIENCE
MATERIALS WORKING
MECHANICAL PROPERTIES
NIOBIUM ALLOYS
PHASE STUDIES
POWDERS
TENSILE PROPERTIES
THERMOMECHANICAL TREATMENTS
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Summary:Ductile toughening of niobium aluminide (Nb sub 2 Al) has been accomplished in situ while combustion synthesizing the compound from a mixture of Nb, Al, and 3 wt.% B powders. An enhancement of the fracture toughness of the resulting Nb sub 2 Al has been shown to be primarily caused by the interaction of propagating cracks and cores of ductile Nb phases inside the partly combusted Nb powders.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1992.tb04245.x