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Processing of Porous SiC by Aluminum‐Derived Binders and Sacrificial Porogen Leaching Method
Author(s) -
Resmi Viswanadhan Girija,
Deepa Jayaprakash Prasanna,
Lakshmi Vijaya,
Rajan Thazhavilai Ponnu Devaraj,
Pavithran Chorappan,
Pai Bellembettu Chandrasekhara
Publication year - 2014
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12358
Subject(s) - materials science , sintering , porosity , leaching (pedology) , ceramic , aluminium , composite material , compressive strength , metal , metallurgy , environmental science , soil science , soil water
Porous SiC was successfully fabricated by a facile and energy efficient sacrificial porogen leaching method using in situ synthesized aluminum‐based binders by reaction bonding at low sintering temperatures of 600–1000°C. Porous S i C ceramics with porosity in the range of 30–58% and compressive strength of 1–33 MP a were obtained. Interconnected bimodal pores were produced by both stacking of SiC particles and leach out of salt. During sintering, the aluminum binder experienced metal to ceramic transformations forming various alumina polymorphs (γ, δ, θ and α‐Al 2 O 3 ). The porogen content and sintering temperatures significantly influence the properties of porous SiC.