Deposition Kinetics of the Cristobalite Aluminum Phosphate Coating on SiC Coated Carbon/Carbon Composites Prepared by Hydrothermal Electrophoretic Technique

Wen Dong Yang; Jian Feng Huang; Li Yun Cao; Xie Rong Zeng

doi:10.4028/www.scientific.net/KEM.434-435.492

Paper Titles

W-Doped DLC Films by IBD and MS
p.477

Titanium Nitride Coatings on Ti Alloys by PIRAC for Orthopedic Implants
p.481

In Situ-Fabrication of TiCN Ceramic Coating on Titanium Alloy by Laser Cladding Technology
p.485

Influence of Electrophoretic Deposition Voltage on the Phase, Microstructure and Property of a Nano-SiC Coating
p.489

Deposition Kinetics of the Cristobalite Aluminum Phosphate Coating on SiC Coated Carbon/Carbon Composites Prepared by Hydrothermal Electrophoretic Technique
p.492

Fabrication of Superhydrophobic Surfaces of Titanium Dioxide and Nickel through Electrochemical Deposition on Stainless Steel Substrate
p.496

Characterization of Silicon Carbide Grown on RB-SiC by Chemical Vapor Deposition
p.499

Preparation of Hydroxyapatite/Chitosan Biological Coatings on Carbon/Carbon Composites
p.502

Influence of Annealing Temperatures on the Properties of Dual-Layer W-TiO₂ Thin Films
p.506

HomeKey Engineering MaterialsKey Engineering Materials Vols. 434-435Deposition Kinetics of the Cristobalite Aluminum...

Deposition Kinetics of the Cristobalite Aluminum Phosphate Coating on SiC Coated Carbon/Carbon Composites Prepared by Hydrothermal Electrophoretic Technique

Abstract:

Cristobalite aluminum phosphate (C-AlPO4) coatings were prepared by hydrothermal electrophoretic process on SiC coated C/C composites at different temperatures. The as-prepared C-AlPO4 coatings was characterized by SEM analyses. The influence of hydrothermal deposition temperature on the microstructures of the as-prepared coatings and the deposition kinetics mechanism were investigated. Results show that dense and homogeneous C-AlPO4 coatings on SiC coated C/C composites can be achieved at 373K and 220V deposition voltage; Kinetics investigations show that the deposition process of the C-AlPO4 coatings on SiC coated C/C composite is controlled by the diffusion rate of the charged C-AlPO4 particles to the cathode; the deposition rate increases with the increase of hydrothermal temperature. The diffusion equation and the kinetic expression of coating process follow the Fick’s second law and Ahrennius relationship. The deposition activation energy of the C-AlPO4 coatings fabricated by the hydrothermal electrophoretic process is calculated to be 21.88kJ/mol.