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Microstructure Control and Wear of Al2O3‐SiC‐(Al, Si) Composites Made by Melt Oxidation
Author(s) -
Jayaram Vikram,
Manna Rampada,
Kshetrapal Manjunath G.,
Sarkar Jaydeep,
Biswas Sanjay K.
Publication year - 1996
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.1151-2916.1996.tb07941.x
Subject(s) - materials science , microstructure , composite material , alloy , composite number , ceramic , porosity , volume fraction , substrate (aquarium) , particle (ecology) , aluminium , particle size , chemistry , geology , oceanography
Ceramic matrix composites of Al 2 O 3 ‐SiC‐(Al, Si) have been fabricated by directed melt oxidation of aluminum alloys into SiC particulate preforms. The proportions of AI 2 O 3 , alloy, and porosity in the composite can be controlled by proper selection of SiC particle size and the processing temperature. The wear resistance of composites was evaluated in pin‐on‐disk experiments against a hard steel substrate. Minimum wear rate comparable to conventional ceramics such as ZTA is recorded for the composition containing the highest fraction of alloy, owing to the development of a thin and adherent tribofilm with a low coefficient of friction.