Preparation of BN Coating on KD-II Silicon Carbide Fiber by Dip-Coating Process

Bei Yang; Xin Gui Zhou; Jin Shan Yu; Hong Lei Wang

doi:10.4028/www.scientific.net/MSF.816.186

Paper Titles

Influence of Composition and Microstructure on the Mechanical Properties of SiC Ceramic Fibers
p.163

Interfacial Wettability and Thermal Conductivity of Diamond/Al Based Composites with Ti and B Additions
p.169

Preparation of Graphene and Graphene/Al Composites
p.177

Influence of Temperatures on the Formation of SiBCN Powders Prepared by CVD Using Borazine and Liquid Polycarbosilane
p.182

Preparation of BN Coating on KD-II Silicon Carbide Fiber by Dip-Coating Process
p.186

Effect of N₂H₄ on Electrodeposition of Ni-Graphene Composite Coatings and their Corrosion Resistance Property
p.192

Microstructure and Mechanical Properties of TiC/Ti₃AlC₂ In Situ Composites Prepared by Hot Pressing Method
p.200

Influence of the Metal Particle Size and Sintering Process on the Electrical Resistivity of m-ZrO₂/30%Mo Cermet
p.205

Microstructure and Mechanical Property of Ti₃AlC₂/TiAl₃ Composite Synthesized by Hot Pressing
p.210

HomeMaterials Science ForumMaterials Science Forum Vol. 816Preparation of BN Coating on KD-II Silicon Carbide...

Preparation of BN Coating on KD-II Silicon Carbide Fiber by Dip-Coating Process

Abstract:

Boron nitride (BN) coating on KD-II silicon carbide fiber was prepared from boric acid and urea by a 4-circle dip-coating process. SiCf/SiC composites were prepared from the precursor LPVCS by a HP(heat pressure) assisted PIP(precursor infiltration and pyrolysis) process. The microstructure and crystal structure of the coatings were characterized by SEM and XRD. XPS was adapted to analysis the composition and contents of different elements on the surface of BN coating. The influence of dip-coating process to the fibers was studied by the monofilament strength test. As the results, the monofilament strengths of the dip-coated fibers decreased firstly and increased subsequently. The strengths were slightly higher (3.4%) than the original fiber after 4 circles. The average flexural strength and fracture toughness of the composites with BN coating are respectively 290.8 MPa and 12.09 MPa⋅m^1/2, while those of composites without coating are 144.1 MPa and 6.72 MPa⋅m^1/2, respectively.