Hot-pressing of TiC-graphite composite materials

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Journal of Materials Engineering and Performance; (United States)

DOI:https://doi.org/10.1007/BF02650054· OSTI ID:5438314

Ono, T; Endo, H; Ueki, M ^[1]

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1. Nippon Steep Corp., Kawasaki (Japan). Advanced Materials and Technology Research Lab.

Monolithic TiC and TiC-graphite composites were hot-pressed at temperatures ranging from 1,800 to 2,100 C and with graphite contents up to 30 wt%. Densification behavior was compared for both monolith and composites based on results of microstructural observation and mechanical tests. Monolithic TiC was well densified at the hot-pressing temperature of 1,800 C; significant grain growth and an accompanying decrease in the flexural strength occurred with an increase in hot-pressing temperature. Conversely, the 10 wt% graphite-containing TiC composite required higher temperatures (1,900 to [approximately]2,000 C) to reach a similar degree of densification approaching that of monolithic TiC. As with densification, flexural strength of the composite increased with an increase in hot-pressing temperature. Graphite dispersions in the composites inhibited grain growth of TiC. Contrary to the equiaxed nature of the monolithic TiC grains, in the composite system, the graphite grains were flattened to thin platelets that aligned perpendicular to the hot-pressing axis. Apparent anisotropy in the microstructure was observed in the composites. At a fixed hot-pressing temperature, the relative density of the composites decreased with increasing graphite content.

• OSTI ID: 5438314
• Journal Information: Journal of Materials Engineering and Performance; (United States), Journal Name: Journal of Materials Engineering and Performance; (United States) Vol. 2:5; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
360602 -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
CARBIDES
CARBON
CARBON COMPOUNDS
COMPOSITE MATERIALS
DATA
ELEMENTAL MINERALS
ELEMENTS
EXPERIMENTAL DATA
FABRICATION
GRAPHITE
HOT PRESSING
INFORMATION
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
MICROSTRUCTURE
MINERALS
NONMETALS
NUMERICAL DATA
PRESSING
TEMPERATURE DEPENDENCE
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS