Premium
Squeeze Cast β‐Si 3 N 4 ‐Al Composites
Author(s) -
Claussen N.,
Beyer P.,
Janssen R.,
May M.,
Selchert T.,
Yang J.F.,
Ohji T.,
Kanzaki S.,
Yamakawa A.
Publication year - 2002
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/1527-2648(200203)4:3<117::aid-adem117>3.0.co;2-9
Subject(s) - materials science , porosity , composite material , ceramic , thermal conductivity , alloy , casting , brake , flexural strength , metallurgy
Ceramic‐metal composites exhibit excellent mechanical properties if the phases form an interpenetrating network. high‐porosity β‐Si 3 N 4 rod‐like networks show the highest bend strength at given porosity. These networks, though very strong, can easily be machined which may also be of advantage for the Al‐infiltrated state. Here, porous high‐strength β‐Si 3 N 4 preforms, partially made from low‐cost Si 3 N 4 powder, were infiltrated with an Si‐containing Al alloy by squeeze casting. The resulting co‐continuous composites show excellent high‐temperature strength which, when associated with estimated thermal conductivity of >50 W/mK, would have potential applications as e.g., heat sinks, wear‐resistant parts like disc brake rotors, etc.