Effects of Processing Parameters in the SPPS and to Understand Their Implications and Improvization | Chapter 9 | Contemporary Perspective on Science, Technology and Research Vol. 9

The preliminary investigations have been carried out about the effects of processing parameters in the SPPS and to understand their implications and improving of this process. The thermal spray processes have been using the different kind of powder feed stocks such as for the coating. It has been widely used for various purposes like to protect from corrosion, improve durability and oxidation resistance properties at high temperature and it can reduce the metal service temperature.
 
The Solution Precursor Plasma Spray (SPPS) process has been used for Thermal Barrier Coatings (TBCs). In this work Zirconyle nitrate is used as solution precursor. It has prepared in house for plasma spray. The prepared solution has successfully deposited on the substrate by SPPS process.The deposited coatings were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). SEM observations showed significant effect of processing conditions on the microstructure of YSZ coatings. The prepared solution can be used for the surface coating.

Author(s) Details:

R. Sudarshan,
Geethanjali College of Engineering and Technology, Cheeryal (V), Keesara (M), RR Dist., Telangana, India.

Sriram Venkatesh,
University College of Engineering, Osmania University, Hyderabad, India.

K. Balasubramanian,
NonFerrous Materials Technology Development Centre, Kanchanbagh, Hyderabad, India.

Noundla Ramya,
NonFerrous Materials Technology Development Centre, Kanchanbagh, Hyderabad, India.

Please see the link here: https://stm.bookpi.org/CPSTR-V9/article/view/14201

Effects of Plasma Current on the Microstructure of Solution Precursor Plasma Spray YSZ Coatings | Chapter 1 | Contemporary Perspective on Science, Technology and Research Vol. 9

The investigations have been carried out for the effects of processing parameter (plasma current) in the SPPS and to understand their implications and improving of this process. Thermal spraying is an advanced materials processing technique which has found wide acceptance in many high technology industries. High temperature, high velocity flame is produced to heat, melt and spray material introduced into the flame. The Solution Precursor Plasma Spray (SPPS) process has been used for obtaining Zirconia coatings asThermal Barrier Coatings (TBCs). The solution precursor Plasma Spray (SPPS) was carried out using a robotic plasma spray system equipped with a liquid spray unit. The gun was connected to a 6 axis ABB robot for precession maneuvering. In this study an in house developed Zirconyle nitratesolution precursor plasma spray setup has been used. In this process the coating is built up by horizontal and vertical passes of the plasma torch across the substrate. The microstructural characterizations of coatings were carried out by scanning electron microscope (SEM) and X-ray diffraction (XRD). Significant effect of plasma current has been observed on the zirconia coatings.

Author(s) Details:

R. Sudarshan,
Geethanjali College of Engineering and Technology, Cheeryal(V), Keesara (M), RR Dist, Telangana, India.

Sriram Venkatesh,
University College of Engineering, Osmania University, Hyderabad, India.

K. Balasubramanian,
NonFerrous Materials Technology Development Centre, Kanchanbagh, Hyderabad, India.

P. Karuna purnapu Rupa,
NonFerrous Materials Technology Development Centre, Kanchanbagh, Hyderabad, India.

Please see the link here: https://stm.bookpi.org/CPSTR-V9/article/view/14166

Study about Fabrication and Evaluation of Different Thermal Barrier Coating Systems | Chapter 06 | Research Developments in Science and Technology Vol. 1

 Using vitreous enamelling and atmospheric plasma spraying (APS) processes, a new thermal barrier coating (TBC) system with an 8-YSZ top coat, glass-ceramic bond coat, and nimonic supper alloy substrate was created. The APS process was used to create a conventional TBC system consisting of an 8-YSZ top coat, a NiCoCrAlY bond coat, and a nimonic supper alloy substrate. The purpose of this research was to evaluate the thermal cycle performance of glass-ceramic bonded TBC systems to traditional TBC systems. X-ray diffraction analysis for phase identification, scanning electron microscopy for microstructural inspection, energy dispersive X-ray analysis for elemental composition determination, and a Vickers hardness tester for hardness evaluation were used to evaluate both TBC systems. Both TBC systems were also subjected to heat cycling testing at 1000oC for 250 hours using both air and water quenching methods. When comparing the glass-ceramic bond coated TBC system to the standard TBC system, a more gradual transition in microhardness values was discovered, indicating that the new TBC system will provide more reliable performance. Thermal cycling at 1000oC revealed that both TBC systems were stable under air quenching testing for 250 cycles, however coating spallation was seen in water quenching tests for 150 cycles for both TBC systems. Furthermore, the old TBC system showed considerable oxidative weight gain, whereas the new TBC system did not.

Author(S) Details

Poulomi Mukherjee
Bio-ceramics and Coating Division, CSIR-Central Glass and Ceramic Research Institute (CSIR-CGCRI), Kolkata-700 032, India.

Pallabi Roy
Bio-ceramics and Coating Division, CSIR-Central Glass and Ceramic Research Institute (CSIR-CGCRI), Kolkata-700 032, India and Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre, (CSIR-HRDC) Campus, Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh- 201 002, India.

Sumana Ghosh
Bio-ceramics and Coating Division, CSIR-Central Glass and Ceramic Research Institute (CSIR-CGCRI), Kolkata-700 032, India.

View Book:- https://stm.bookpi.org/RDST-V1/article/view/6322