समीक्षा
SPPS is an exciting method to produce a wide variety of functional oxide ceramic coatings, employing appropriate solution precursors in contrast to powder feedstock in case of conventional plasma spraying. The technique utilizes aqueous/organic chemical precursor solutions fed into the high temperature plasma plume through a dedicated delivery device. The solvent vaporizes as the droplet travel downstream to form solid particles and are heated & accelerated to the substrate to form finely structured coating deposits.
Key Features
The SPPS process opens new avenues for developing compositionally complex functional oxide coatings, with the following benefits:
- ability to create nanosized microstructures without any feeding problems normally associated with powder-based systems,
- flexible, rapid exploration of novel precursor compositions and their combinations
- circumvention of expensive powder feedstock preparation steps,
- better control over the chemistry of the deposit
Schematic of SPPS process
YSZ coating with vertical cracks & distributed pores
Potential Applications
- YSZ based TBCs for gas/steam turbine applications
- Pure α-Al2O3 based dielectric coatings
- Graphene films for wear resistance, energy storage applications
- LSM, LiFePO4, etc for electrodes (anode & cathode) of SOFCs/Li-Ion Batteries
- Ferrites and Titania for photocatalytic applications
- Solar absorption coatings
- High entropy alloy / Nanocomposite coatings for hydrogen generation
अवस्था
- Developed wide ranging functional coatings for diverse industrial applications
- Prototype demonstration of various coatings
Intellectual Property Development Index (IPDI)
Level
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10
उल्लेख
Basic concepts and understanding of underlying scientific principles
Shortlisting possible applications
Research to prove technical feasibility for targeted application
Coupon level testing in simulated conditions
Check repeatability/consistency
Prototype testing in real-life conditions
Check repeatability/consistency
Reassessing feasibility (IP, competition technology, commercial)
Initiate technology transfer
Support in stabilizing production
अवस्था
| Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|
| उल्लेख | Basic concepts and understanding of underlying scientific principles | Shortlisting possible applications | Research to prove technical feasibility for targeted application | Coupon level testing in simulated conditions | Check repeatability/consistency | Prototype testing in real-life conditions | Check repeatability/consistency | Reassessing feasibility (IP, competition technology, commercial) | Initiate technology transfer | Support in stabilizing production |
| अवस्था |
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For more details on Intellectual Property Development Indices, Click here
- Easwaramoorthi Ramasamy, Sivakumar Govindarajan, Shrikant Joshi, Production of Graphene based Materials by Thermal Spray, ARCI patent appl. no. 2626/DEL/2015
- G. Sivakumar, R.O. Dusane, and S.V. Joshi, “Understanding the Formation of Vertical cracks in Solution Precursor Plasma Sprayed Yttria-Stabilized-Zirconia Coatings”, Journal of American Ceramic Society, 97(11), 3396-3406, 2014
- G. Sivakumar, Rajiv O. Dusane and Shrikant V. Joshi, A novel approach to process phase pure α-Al2O3 coatings by solution precursor plasma spraying’, Journal of the European Ceramic Society, 33 (2013) 2823–2829