Biomorphic ceramics from wood-derived precursors

Abstract

He has published over 160 papers in peer-reviewed journals and has been the PI of over 20 nationally and internationally funded research grants. His research interests include the study of biomorphic silicon carbide, single crystal and polycrystalline zirconia and alumina, alumina-based composites, silicon nitride, electronic ceramics, ceramic joining, and single crystals fibers.Mrityunjay Singh is Chief Scientist, Ohio Aerospace Institute, NASA Glenn Research Center, Cleveland, Ohio. He has edited/co-edited thirty eight books and five journal volumes, authored/co-authored ten book chapters/invited reviews and more than two hundred fifty papers in journals and edited volumes. He is involved with various activities in processing, manufacturing, joining and attachment technologies, and characterization of advanced ceramics and composites, lightweight cellular ceramics, environment conscious ceramics, and porous ceramic foams, high conductivity composites and graphite foams for thermal management systems, ceramic matrix composites for turbomachinery and propulsion systems, and a wide variety of materials for ultra high temperature and extreme environment applications.* Corresponding author -Email: jrr@us.es, Tel: +34 954 550 936 Biomorphic Ceramics from Wood Derived PrecursorsMaterials development is driven by microstructural complexity, in many cases inspired by biological systems like bones, shells, and wood. In one approach, one selects the main microstructural features responsible for improved properties a designs processes to obtain materials with such microstructures (continuous-fiber-reinforced ceramics, porous ceramics, fibrous ceramic monoliths, etc.). In a different approach, it is possible to use natural materials directly as microstructural templates. Biomorphic ceramics are produced from natural and renewable resources (wood or wood-derived products). A wide variety of SiC based ceramics can be fabricated by infiltration of silicon or silicon alloys into cellulose-derived carbonaceous templates, providing a low-cost route to advanced ceramic materials with near-net shape potential and amenable to rapid prototyping. These materials have tailorable microstructure and properties, and behave like ceramic materials manufactured by advanced ceramic processing approaches. This review aims to be a comprehensive description of the development of bioSiC ceramics:from wood templates and their microstructure to potential applications of bioSiC materials.

Silicon infiltrated silicon carbide from extruded thermoplastic wood polymer composites

“…The high anisotropic pyrolysis-shrinkage for wood and engineered wood products is well-studied. 6,7,15 Nevertheless, knowing the shrinkage of each compound is required for latter manufacturing and reveals the relationship between raw material composition and shrinkage. The measured shrinkage in the x,y-directions for the plates was equal.…”

“…6 Several studies are describing the pyrolysis and conversion of cellular wood or parts of plants into SiC ceramic, discussing the resulting microstructure and properties. [7][8][9][10][11][12] Besides natural materials, there are technical engineered wood products, which can be used as starting material for manufacturing SiSiC, eg, medium density fiberboards (MDF), high-density fiberboards (HDF), oriented structural boards (OSB), or other fiberboards. [13][14][15] SiSiC from these wood composites can show more isotropic material behavior, but more important are the reproducibility and the elimination of natural fluctuations.…”

Effects of Filling Rate and Resin Concentration on Pore Characteristics and Properties of Carbon Based Wood Ceramics

“…In the long development process of materials science, the preparation of new materials by imitating the characteristics of organisms in nature has broken through many technical difficulties, and then the biomimetic materials science was spawned, of which the wood ceramics is a typical example. Wood ceramics derived from natural wood or wood materials are porous ceramics, which completely retain the microscopic pore structure of natural wood [ 13 , 14 ]. According to the composition of substrate material, wood ceramics can be divided into 4 categories as shown in Figure 1 : carbon based wood ceramics [ 15 , 16 ] (C WCMs), XC (SiC, ZrC, TiC et al) based wood ceramics [ 17 , 18 ] (XC WCMs), oxide wood ceramics [ 19 , 20 ] (Oxide WCMs) and composite wood ceramics [ 21 , 22 ] (Composite WCMs).…”

Preparation of C/C‐SiC Composites from All‐Cellulose Precursors

“…As an alternative to phenols, biogenic materials derived from wood precursors such as different types of monolithic natural timbers and lignin‐free cellulose precursors have been carbonized and subjected to siliconization, too . However, CMCs based on these materials suffer from poor mechanical properties as a result of the defects in the carbonaceous and molecular structure of these biogenic materials, which both negatively influence mechanical properties.…”