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Processing and Microstructure Development of Titanium Carbide–Nickel Aluminide Composites Prepared by Melt Infiltration/Sintering (MIS)
Author(s) -
Plucknett Kevin P.,
Becher Paul F.
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb00607.x
Subject(s) - materials science , aluminide , titanium aluminide , microstructure , sintering , carbide , titanium carbide , metallurgy , alloy , titanium , nickel , intermetallic , grain growth , composite material
A combined melt‐infiltration/sintering (MIS) route has been described for the preparation of composites that are based on titanium carbide (TiC) with a ductile nickel aluminide (Ni 3 Al) “binder” phase. This approach allows control of the Ni 3 Al content, which can be varied readily in the range of 4–25 vol%. Densities of >98% of the theoretical density have been obtained for composites that have been prepared with Ni 3 Al contents of ≥8 vol%. Preliminary examination indicates that the infiltration kinetics approximate to parabolic at 1300°C. Compositional analysis of the densified materials indicates only minimal titanium dissolution into the Ni 3 Al alloy (<6 at.%), with an analyzed carbide composition of TiC 0.93 . Cubic grain‐growth kinetics are observed for TiC–16‐vol% Ni 3 Al, with an activation energy of ∼400 ± 60 kJ/mol.