About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advanced Coatings for Wear and Corrosion Protection
|
| Presentation Title |
Anti-erosion coatings of silicon carbide and tantalum carbonitride nanocomposite by chemical vapor deposition |
| Author(s) |
Hirokazu Katsui, Kazuya Shimoda, Katsuyoshi Harada, Jun Kumagai, Mikinori Hotta |
| On-Site Speaker (Planned) |
Hirokazu Katsui |
| Abstract Scope |
Silicon carbide (SiC) is an attractive material for anti-erosion protective coatings because of its high hardness. Since maximizing ratios of hardness to modulus (H/E) improves erosion resistance, maintaining the hardness of SiC, while reducing modulus of ceramic coatings is crucial for developing highly durable coating systems. The desired moderate elastic modulus could be achieved by reducing crystallinity, while hardness was enhanced by introducing a nanocomposite structure. This study demonstrated the growth of SiC and tantalum carbonitride (TaCN) nanocomposite films with high hardness and moderate modulus using laser chemical vapor deposition with metal-organic precursors. The low-crystallinity SiC-TaCN composite films with a nanometric mosaic structure were deposited on substrates of ceramics and metals. The cross-sectional nanoindentation tests revealed a reduced Young's modulus of 238.2 GPa and a hardness of 30.4 GPa, respectively. The SiC-TaCN nanocomposite film exhibited superior durability in erosion tests using a zirconia slurry at 20 kPa. |