About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advanced Coatings for Wear and Corrosion Protection
|
| Presentation Title |
Understanding the role of particle size on thin coating formation and mechanical properties of WC-Co-Cr coatings deposited by HVAF spray |
| Author(s) |
Vijaya Lakshmi Devara, Sivakumar Govindarajan, Prasad M.J.N.V., Suresh Babu Pitchuka |
| On-Site Speaker (Planned) |
Vijaya Lakshmi Devara |
| Abstract Scope |
The thermal spraying of WC-Co-Cr coatings as an alternative to hard chrome plating faces challenges due to the need for post-machining in actual applications. To reduce the post-grinding, using fine feedstocks (≤20 μm) and depositing thin coatings by using advanced coating techniques is promising. However, the impact of initial feedstock size on the surface finish and performance of thin WC-Co-Cr coatings remains unclear. This study examines the effect of feedstock particle size on coating formation and surface roughness using high-velocity air-fuel (HVAF) spray. Three fine particle sizes were used for thin coatings (≤50 μm), and a coarse powder (deposited ~250 μm thick) was used for benchmarking. The results have shown the influence of particle size on surface roughness, change in the coefficient of friction and wear rate. The study highlights the thin and thick coating's performance along with hard chrome plating under wear and corrosion conditions. |