Premium
Centrifugal Casting of Thin‐Walled Ceramic Tubes from Preceramic Polymers
Author(s) -
Melcher Reinhold,
Cromme Peter,
Scheffler Michael,
Greil Peter
Publication year - 2003
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.1151-2916.2003.tb03451.x
Subject(s) - materials science , composite material , centrifugal casting (silversmithing) , ceramic , casting , porosity , polymer , tube (container) , triethoxysilane , slurry , pyrolysis , chemical engineering , mold , engineering
Thin‐walled (wall thickness, 100–2000 μm) mono‐ and bilayered ceramic tubes in the system Si–O–C–(N) were obtained by centrifugal casting of a polysiloxane/filler suspension. Si and SiC powders were dispersed in polyorganosiloxane/triethoxysilane solutions. After centrifugal casting in a Teflon tube with a rotational speed of 2000 rpm and subsequent cross‐linking at 130°C and 60 rpm, the tubes were pyrolyzed in argon or in nitrogen at 1400–1600°C. Bilayered tubes with controlled variation of porosity were obtained by overcasting the monolayer green tubes with a modified slurry composition.