Melt Spinnable Blend Polymers of Polycarbosilane and Polysiloxane for Synthesis of Silicon Carbide Micro Tube Structures

Kenichiro Kita; Masaki Narisawa; Hiroshi Mabuchi; Masayoshi Itoh

doi:10.4028/www.scientific.net/KEM.352.69

Paper Titles

Influence of Crack Healing on Mechanical Properties of SiC Fabric / SiC- Al₂O₃ Matrix Laminates
p.49

Characterization of Mechanical Properties of Brittle Coating Systems by Various Indentation Techniques
p.53

High Performance SiC Fibers from Polycarbosilane for High Temperature Applications
p.59

Atomic-Scale Structure of Polymer-Route Si-C-O Fibers Observed by Synchrotron Radiation X-Ray Diffraction
p.65

Melt Spinnable Blend Polymers of Polycarbosilane and Polysiloxane for Synthesis of Silicon Carbide Micro Tube Structures
p.69

Mechanical Properties of SiC Processed with Nanometer-Sized Powder and Polytitanocarbosilane
p.73

Fabrication of Two Dimensional Silicon Carbide Fiber-Reinforced Silicon Carbide Composite by Electrophoretic Deposition and Hot-Pressing
p.77

Deflocculation of Alumina Suspensions Using Polyelectrolyte Dispersants
p.81

Investigation of Factors Influencing the Formation of Tungstate-Based Inorganic-Organic Hybrid Nanobelts/Nanotubes
p.85

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Melt Spinnable Blend Polymers of Polycarbosilane and Polysiloxane for Synthesis of Silicon Carbide Micro Tube Structures

Abstract:

Silicon carbide base ceramic tubes were synthesized from blend polymers of polycarbosilane (PCS) and methylhydrogen silicon oil (H-oil) by polymer precursor method. This precursor method consisted of melt spinning, thermal oxidation curing and pyrolysis processes. Pore structure observed at cross sections of obtained tubes depended on H-oil content, melt-spinning temperature and oxidation curing conditions. At 578K for melt-spinning, however, a considerable amount of H-oil was decomposed during the spinning process. The resulting H-oil contents were usually lower than the starting H-oil contents. In the case of the 578K melt spinning, however, unique single pore structures were often observed in the tubes by adjusting the curing conditions. At 40% of the H-oil content, large pores with thin walls were observed at the cross-section, while such structures were difficult to be controlled. By reducing the melt-spinning temperature to 543K, the starting H-oil contents could be maintained during the spinning process. The cross sections of the tubes often showed multi pores in this case.