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Biomorphic Cellular Ceramics
Author(s) -
Sieber H.,
Hoffmann C.,
Kaindl A.,
Greil P.
Publication year - 2000
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/(sici)1527-2648(200003)2:3<105::aid-adem105>3.0.co;2-p
Subject(s) - materials science , ceramic , microstructure , composite material , pyrolysis , porosity , template , composite number , carbon fibers , nanotechnology , chemical engineering , engineering
Biotemplating—a new concept for preparation of ceramic composite materials with biomorphic microstructures will be described. Biological carbon preforms (C B ‐templates) were derived from different wood structures by high‐temperature pyrolysis at temperatures between 800 and 1800 °C and used as templates for infiltration with gaseous or liquid Si to form SiC‐ and SiSiC‐ceramics. During high‐temperature processing, the microstructural details of the bioorganic preforms were retained. Cellular ceramic composites with unidirectional porous morphologies and anisotrophic mechanical properties were obtained. The cellular composites show low density, but high specific strength and excellent high temperature stability.