In Situ Synthesis of Porous Silicon Carbide (SiC) Ceramics Decorated with SiC Nanowires

We fabricated highly aligned porous silicon carbide (SiC) ceramics decorated with SiC nanowires by the unidirectional freeze casting of SiC/camphene slurries with various polycarbosilane (PCS) contents, ranging from 0 to 20 wt% in relation to the SiC powders, in which the PCS preceramic was used as a binder and source for the in situ growth of the SiC nanowires. In this method, aligned pore channels were formed as a replica of the unidirectionally grown camphene dendrites, while SiC nanowires were formed within the pores in situ via a vapor–liquid–solid (VLS) mechanism during the heat treatment of the porous green bodies at 1400°C for 1 h in a flowing Ar atmosphere. The pore channels were well decorated with single-crystalline SiC nanowires. It was also observed that the growth of the SiC nanowires was strongly affected by the initial PCS content and heat-treatment temperature.

[1]  A. Saeki,et al.  High Performance Silicon Carbide Fiber Hi‐Nicalon for Ceramic Matrix Composites , 2008 .

[2]  Hyoun‐Ee Kim,et al.  Highly Aligned Porous Silicon Carbide Ceramics by Freezing Polycarbosilane/Camphene Solution , 2007 .

[3]  Hyoun‐Ee Kim,et al.  Highly porous hydroxyapatite bioceramics with interconnected pore channels using camphene-based freeze casting , 2007 .

[4]  Chong-Min Wang,et al.  Synthesis of SiC nanorods from bleached wood pulp , 2007 .

[5]  姚秀敏,et al.  Effect of recoating slurry viscosity on the properties of reticulated porous silicon carbide ceramics , 2006 .

[6]  Hyoun‐Ee Kim,et al.  Effect of Polystyrene Addition on Freeze Casting of Ceramic/Camphene Slurry for Ultra‐High Porosity Ceramics with Aligned Pore Channels , 2006 .

[7]  Eduardo Saiz,et al.  Freeze casting of hydroxyapatite scaffolds for bone tissue engineering. , 2006, Biomaterials.

[8]  Hyoun‐Ee Kim,et al.  Freezing Dilute Ceramic/Camphene Slurry for Ultra‐High Porosity Ceramics with Completely Interconnected Pore Networks , 2006 .

[9]  H. Bahn,et al.  Fabrication of a Porous Bioactive Glass–Ceramic Using Room-Temperature Freeze Casting , 2006 .

[10]  Qin Li,et al.  In Situ Growth of β‐SiC Nanowires in Porous SiC Ceramics , 2005 .

[11]  J. Halloran,et al.  Porous Ceramic Bodies with Interconnected Pore Channels by a Novel Freeze Casting Technique , 2005 .

[12]  L. Gibson.  Biomechanics of cellular solids. , 2005, Journal of biomechanics.

[13]  Sumin Zhu,et al.  Low-temperature fabrication of porous SiC ceramics by preceramic polymer reaction bonding , 2005 .

[14]  P. González,et al.  Biomorphic SiC: A New Engineering Ceramic Material , 2005 .

[15]  G. J. Exarhos,et al.  Synthesis of SiC Ceramics by the Carbothermal Reduction of Mineralized Wood with Silica , 2005 .

[16]  X. Zhu,et al.  Improvement in the Strut Thickness of Reticulated Porous Ceramics , 2004 .

[17]  T. Graule,et al.  Wood‐Derived Porous SiC Ceramics by Sol Infiltration and Carbothermal Reduction , 2004 .

[18]  Chul B. Park,et al.  Processing of microcellular preceramics using carbon dioxide , 2003 .

[19]  M. Pérez-Amor,et al.  New biomorphic SiC ceramics coated with bioactive glass for biomedical applications. , 2003, Biomaterials.

[20]  D. Koch,et al.  Freeze gelation: a new option for the production of biological ceramic composites (biocers) , 2003 .

[21]  M. G. Norton,et al.  Silicon Carbide Nanosprings , 2003 .

[22]  P. Colombo,et al.  Ceramic foams from preceramic polymers , 2002 .

[23]  T. Ohji,et al.  Oxidation bonding of porous silicon carbide ceramics , 2002 .

[24]  S. Kanzaki,et al.  Synthesis of Porous Silicon Nitride with Unidirectionally Aligned Channels Using Freeze‐Drying Process , 2002 .

[25]  Chongmin Wang,et al.  Helical Crystalline SiC/SiO2 Core−Shell Nanowires , 2002 .

[26]  T. Ohji,et al.  Filtering Properties of Porous Ceramics with Unidirectionally Aligned Pores , 2002 .

[27]  M. Kramer,et al.  In situ Growth of SiC Whisker in Pyrolyzed Monolithic Mixture of AHPCS and SiC , 2000 .

[28]  Peter Greil,et al.  Polymer Derived Engineering Ceramics , 2000 .

[29]  Yoshihiro Tange,et al.  Effect of a Catalyst on the Formation of SiC Whiskers from Polycarbosilane. Nickel Ferrite as a Catalyst , 1999 .

[30]  C. Pham‐Huu,et al.  High surface area silicon carbide doped with zirconium for use as catalyst support. Preparation, characterization and catalytic application , 1999 .

[31]  Yoshihiro Tange,et al.  Growth rate and morphology of silicon carbide whiskers from polycarbosilane , 1999 .

[32]  E. Passalacqua,et al.  Alkali resistance of tape-cast SiC porous ceramic membranes , 1998 .

[33]  G. Chollon,et al.  Processing and characterization of an amorphous Si–N–(O) fibre , 1998 .

[34]  T. Yamamura,et al.  High-strength alkali-resistant sintered SiC fibre stable to 2,200 °C , 1998, Nature.

[35]  C. Byrne,et al.  Cellulose derived composites – A new method for materials processing , 1997 .

[36]  I. Nettleship.  Applications of Porous Ceramics , 1996 .

[37]  J. Milewski,et al.  Growth of beta-silicon carbide whiskers by the VLS process , 1985 .

[38]  L. Gauckler,et al.  Macroporous Ceramics from Particle-Stabilized Wet Foams , 2007 .

[39]  D. Jiang,et al.  Effect of recoating slurry viscosity on the properties of reticulated porous silicon carbide ceramics , 2006 .

[40]  S. Kanzaki,et al.  Oxidation bonding of porous silicon carbide ceramics with synergistic performance , 2004 .

[41]  E. Vogli,et al.  Biomorphic SiC-ceramic prepared by Si-vapor phaseinfiltration of wood , 2002 .

[42]  M. Edirisinghe,et al.  Preparation of silicon carbide foams using polymeric precursor solutions , 2000 .

[43]  A. Oberlin,et al.  Conversion mechanisms of a polycarbosilane precursor into an SiC-based ceramic material , 1991, Journal of Materials Science.