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Showing 1 to 20 of 35 for “"plasma spray"”.
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Development of a Plasma Spray Process Monitoring System through Aeroacoustic Signal Analysis
Plasma spray coatings are vital to the capabilities of jet engines. They allow engines to operate at combustion temperatures that would otherwise melt the superalloy components. Coatings tighten clearance between rotating components, increasing engine compression. They prevent chemical attack and …
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Optimal Parameters for Doubly Curved Sandwich Shells, Composite Laminates, and Atmospheric Plasma Spray Process
… than the first failure load. For the atmospheric spray process, we employ the NeSS algorithm to find optimal values of four process input parameters, namely the argon flow rate, the hydrogen flow rate, the powder feed rate and the current, that result in the desired mean particle temperature and …
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Adaptive Process Control for Achieving Consistent Mean Particles' States in Atmospheric Plasma Spray Process
The coatings produced by an atmospheric plasma spray process (APSP) must be of uniform quality. However, the complexity of the process and the random introduction of noise variables such as fluctuations in the powder injection rate and the arc voltage make it difficult to control the coating …
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Solid oxide fuel cell electrolytes produced via very low pressure suspension plasma spray and electrophoretic deposition
… into electrical energy. Both very low pressure plasma spray and electrophoretic deposition allow working with high melting temperature SOFC suspension based feedstock on complex surfaces, such as in non-planar SOFC designs. Dense, thin electrolytes of ideal composition for SOFCs can be …
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Characterization Study of Plasma Spray Attachment of Intrinsic Fabry-Perot Interferometric Sensors in Power Generation Applications
The purpose of this study is to characterize the plasma spray deposits used for attaching intrinsic Fabry-Perot interferometric fiber optic strain sensors. The deposits must maintain adhesion at elevated temperatures without distorting the sensors' signals. Two different material systems were …
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Study of microstructure effect on the thermal properties of Yttria-stabilized-Zirconia thermal barrier coatings made by atmospheric plasma spray and pressing machine
… set of samples was fabricated by Atmospheric Plasma Spray process for two different microstructure configurations, standard (STD) and vertically cracked (VC), and two different thicknesses, 400 and 700 micron respectively. A laser flash system was used to measure the thermal properties of the …
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The Effect of Substrate Parameters on the Morphology of Thermally Sprayed PEEK Splats
Thermal spray is a well established technology that is commonly used in the aerospace and automotive industries. This thesis reports on the effect that substrate surface chemistry, morphology and temperature has on the morphology of PEEK single splats on aluminium substrates. PEEK single splats …
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Design of experiment analysis of high velocity oxy-fuel coating of hydroxyapatite
… the high velocity oxy-fuel (HVOF) thermal spray process has been widely adopted by many industries. Though there are different types of flame spraying processes, the HVOF thermal spray process utilises only powder as the coating material rather than wire or rod. Carbon-hydrogen group of …
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Optimized Surface Roughening by Pulsed Waterjet for Suitable Adhesion Strength of Plasma Transferred Wire Arc Coating
… the high-pressure pulsed waterjet process and plasma transferred wire arc technology to develop a technique to remanufacture worn-out cylinder bores and give new life to worn-out engines. Plasma transferred wire arc technology is currently being used for engine remanufacturing to deposit the …
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Strategic Sourcing of Serial Production Processes in Jet Engine Manufacturing
… an airfoil’s single crystal casting to thermal plasma spray coatings and wire EDM-drilled cooling holes. Many of these processes are extremely specialized, requiring special equipment, environmental controls, and expertise to produce at the precise tolerances required in aerospace. Utilizing …
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Microstructures and oxidation properties in hafnium-tantalum-nitride ceramics
… nitrides were fabricated with the vacuum plasma spray process. The resulting nitrides had significant nitrogen content loss. This loss of nitrogen was used to explain the formation of metal-rich nitrides. The nitride compositions underwent two oxidation experiments between 400-1600^o C. …
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Effects of Tricalcium Phosphate Coated Titanium on Adjacent Early Bone Formation
… have been coated with hydroxyapatite (HA), plasma spray, and several blasting techniques have been implemented. Tricalcium phosphate (TCP) is a coating that has been used for several years. Due to its porosity and likeness to natural bone, many feel that it is an ideal coating for both …
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Development Of Thermally Processed Nanocomposites With Controlled Surfaces
… material selection and the utilization of plasma spray processing can be of potential interest to a large number of industrial, biomedical and everyday life applications. This research demonstrates also that plasma processing is a promising engineering tool for multifunctional coatings and …
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Design and development of a powder mixing device used in the deposition of high velocity oxy-fuel (HVOF) thermal spray functionally graded coatings; Kabir Al Mamun
… Materials (FGMs) is quite difficult, but thermal spray processes like Plasma spray have demonstrated their unique potential in producing graded deposits, where researchers have used twin powder feed systems to mix different proportions of powders. However the HVOF (High Velocity Oxy-Fuel) process …
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The Adhesion Strength of a Plasma Sprayed Silicon Bond Coating on a Silicon Carbide Ceramic Matrix Composite
… EBCs are typically deposited via atmospheric plasma spraying (APS) and preparing the component surfaces through cleaning and roughening prior to coating is a vital step to ensure sufficient coating adhesion. The adhesion of a plasma sprayed coating to the underlying component is one of the …
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Formulation and Process of Powder Coating for Solid Oxide Fuel Cell Interconnects
… The current preferred coating method is air-plasma spray (APS) which has transfer efficiency of only around 40%, and is relatively expansive. The objective of this project is to develop powder coating technology as an alternative in SOFC interconnect coating, given its environmental …
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Experimental and numerical analysis of fuel cells
… study is done for the application of APS (Air Plasma Spray) to SOFC and adhesion of anode and cathode with electrolytes for the determination of parameters involved in manufacturing the components of fuel cell. The new aspects on physical phenomena are significantly different from the currently …
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Synergistic Modeling of Advanced Manufacturing Processes with Functional Variables
… multiple functional variables (Chapter 2), a plasma spray process with multiple scalar and functional variables (Chapter 3), and an additive manufacturing process called fused deposition modeling with quantitative and qualitative quality responses (Chapter 4).
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