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Formation of Al 2 O 3 –TiC Composite Nano‐Particles Synthesized from Carbon‐Coated Precursors
Author(s) -
Kaga Hisashi,
Koc Rasit
Publication year - 2007
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.1551-2916.2006.01420.x
Subject(s) - materials science , titanium carbide , endothermic process , exothermic reaction , carbon fibers , composite number , chemical engineering , titanium , carbide , coating , nano , economies of agglomeration , metallurgy , composite material , chemistry , adsorption , organic chemistry , engineering
The formation of nano‐sized alumina–titanium carbide (Al 2 O 3 –TiC) composite powders from a carbon‐coated titanium dioxide–aluminum (TiO 2 –Al) mixture was investigated. The carbon‐coated TiO 2 –Al mixture altered the mechanism of the reaction, compared with standard mixtures, to produce high‐quality nano‐sized Al 2 O 3 –TiC powders. Data synthesized from intermediate temperatures indicate that these products form via Ti 2 O 3 and Al 3 Ti. TEM images of the Al 2 O 3 –TiC powders showed fine size (50–100 nm), narrow size distribution, and lack of agglomeration. DSC data for the carbon‐coated TiO 2 –Al mixture showed a single endothermic and four successive weak exothermic reactions as the carbon coating moderated the heat release during the reaction.