Densification of a SiC-matrix by electrophoretic deposition and polymer infiltration and pyrolysis process

Abstract With the aim to improve the properties of the SiC-matrix in a SiC f /SiC composite for fusion applications, a new fabrication technique combining electrophoretic deposition (EPD) and polymer infiltration and pyrolysis (PIP) was introduced. By using EPD from a well-dispersed, aqueous suspension we were able to produce SiC green bodies with closely packed particles (>62%TD). This deposition was followed by vacuum infiltration of the green body with pre-ceramic polymer precursor and then pyrolysis and crystallization at 1600 °C. Due to the high initial packing density of the deposits, only a few polymer-infiltration and pyrolysis steps were needed to achieve a relatively high density of the material. The SiC samples fabricated by the combined EPD-PIP process reached the matrix density of ∼86.5% TD and average pore size of ∼90 nm after six consecutive PIP cycles, while high thermal conductivity values (>30 W/mK) were obtained already after one PIP cycle.

[1]  S. Peters.  Handbook of Composites , 1998 .

[2]  Neil B. Morley,et al.  Design requirements for SiC/SiC composites structural material in fusion power reactor blankets , 1998 .

[3]  W. J. Weber,et al.  Promise and challenges of SiCf/SiC composites for fusion energy applications , 2002 .

[4]  Aljaž Iveković,et al.  Preparation of SiCf/SiC composites by the slip infiltration and transient eutectoid (SITE) process , 2010 .

[5]  Spomenka Kobe,et al.  Fabrication of CNT-SiC/SiC composites by electrophoretic deposition , 2010 .

[6]  A. Boccaccini,et al.  Electrophoretic deposition: From traditional ceramics to nanotechnology , 2008 .

[7]  Akira Kohyama,et al.  Issues and advances in SiCf/SiC composites development for fusion reactors , 2004 .

[8]  L. S. Sigl,et al.  Thermal conductivity of liquid phase sintered silicon carbide , 2003 .

[9]  James A. DiCarlo,et al.  Non-oxide (Silicon Carbide) Fibers , 2005 .

[10]  S. Kobe,et al.  Electron microscopy and microanalysis of the fiber-matrix interface in monolithic silicone carbide-based ceramic composite material for use in a fusion reactor application. , 2008, Scanning.

[11]  N. Boukos,et al.  Structural, thermal, electrical and magnetic properties of Eurofer 97 steel , 2008 .

[12]  Alberto Ortona,et al.  Manufacturing SiC‐Fiber‐Reinforced SiC Matrix Composites by Improved CVI/Slurry Infiltration/Polymer Impregnation and Pyrolysis , 2004 .

[13]  Y. Katoh,et al.  Handbook of SiC properties for fuel performance modeling , 2007 .

[14]  Steven J. Zinkle,et al.  Overview of materials research for fusion reactors , 2002 .

[15]  A. Kohyama,et al.  SiC/SiC composites through transient eutectic-phase route for fusion applications , 2004 .

[16]  J. Tabellion,et al.  Electrophoretic deposition from aqueous suspensions for near-shape manufacturing of advanced ceramics and glasses—applications , 2004 .

[17]  R. Day,et al.  Conversion of polycarbosilane (PCS) to SiC-based ceramic Part 1. Characterisation of PCS and curing products , 2001 .

[18]  R. Day,et al.  Conversion of polycarbosilane (PCS) to SiC-based ceramic Part II Pyrolysis and characterisation , 2001 .

[19]  A. Tavassoli,et al.  Present limits and improvements of structural materials for fusion reactors – a review , 2002 .

[20]  Infiltration of a 3-D Fabric for the Production of SiC/SiC Composites by Means of Electrophoretic Deposition , 2009 .

[21]  N. Daneu,et al.  Preparation and analytical electron microscopy of a SiC continuous-fiber ceramic composite , 2005 .

[22]  A. Solomon,et al.  Polymer impregnation and pyrolysis process development for improving thermal conductivity of SiCp/SiC–PIP matrix fabrication , 2008 .

[23]  R. Yamada,et al.  Thermal diffusivity/conductivity of Tyranno SA fiber- and Hi-Nicalon Type S fiber-reinforced 3-D SiC/SiC composites , 2004 .