The role of reaction path on microstructural evolution during transient plastic phase processing of titanium carbide-titanium boride composites

Conference · Tue Aug 01 04:00:00 EDT 1995

OSTI ID:77969

Brodkin, D; Barsoum, M; Kalidindi, S; Zavaliangos, A ^[1]

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1. Drexel Univ., Philadelphia, PA (United States). Dept. of Materials Engineering

Transient Plastic Phase Processing (TPPP) is a technique capable of in-situ manufacturing complex shaped, fully dense, ultra-refractory ceramic-ceramic composites at temperatures that are significantly lower than their melting points (T < 0.65T{sub m}). TPPP involves two steps: (1) plastic forming of a two phase particulate mixture, comprising a transient plastic phase (TPP) and a reactant phase (RP), at a relatively low temperature in a soft condition resulting in densification of the powder mix with no change in the composition of the constituents, followed by (2) reaction synthesis at a higher temperature in which the RP reacts with the TPP and shifts its stoichiometry to a harder, more refractory composition. A detailed experimental study was performed on Ti-B-C system to elucidate the effects of starting composition and processing conditions on the final composition, residual porosity, and mechanical properties of the produced ceramic-ceramic composites. Particular attention is paid on the factors influencing the reaction paths and their effect on formation of platelet reinforcements, and evolution of microstructure in this system.

• OSTI ID: 77969
• Report Number(s): CONF-950201--; ISBN 0-87339-283-3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COMPOSITE MATERIALS
FABRICATION
MECHANICAL PROPERTIES
MICROSTRUCTURE
PARTICULATES
PLASTICITY
TITANIUM BORIDES
TITANIUM CARBIDES