Overview
Theoretically dense SiC coating processed by chemical vapour deposition (CVD) exhibits superior physical, mechanical, thermal and optical properties with excellent wear, abrasion and chemical corrosion resistance. The properties of CVD SiC coating can be tailored by control of various parameters including reactor design, process temperature, pressure, reactants composition and flow geometry. ARCI has established a CVD system for coating of large size components (up to 1.0 m meter) by thermal deposition of methyl-trichlorosilane (MTS) in excess of hydrogen. High density CVD SiC coating on various substrates with different geometries have been produced. It has been demonstrated that the CVD SiC coating can be polished up to the RMS surface roughness < 1 nm. ARCI also has the capability to produce self-standing CVD SiC parts.
Key Features
- State-of-the art CVD SiC coating facility.
- The processes technology has been established
- SiC coating on different size and shapes can be produced.
- CVD SiC coating can be polished to very high surface finish(<1 nm).
Potential Applications
- Reflectors for high energy laser and synchrotron radiation.
- Wear and corrosion resistant coatings
- Reflectors for concentrated solar power (CSP) applications
- Solar collectors and concentrators for astronomical telescopes.
Status
- The process technology and repeatability have been established.
Intellectual Property Development Index (IPDI)
Level
1
2
3
4
5
6
7
8
9
10
Description
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
Status
| Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|
| Description | 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 |
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- D. C. Jana and B. P Saha, Silicon carbide-based lightweight mirror blanks for space optics applications. In: Y. Mahajan and R. Johnson (Eds) Handbook of Advanced Ceramics and Composites, First Edition, Springer Nature Switzerland AG, 2020, pp. 1135-1163.