NDLI: Optimization of Plasma Spray Processing Parameters for Deposition of Nanostructured Coatings

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ahmed, I. Bergman, T. L.
Copyright Year	2002
Abstract	When nanostructured material is thermally sprayed to produce coatings, the retention of the original nanostructure that is engineered into the raw stock is a principal objective, along with production of some molten material in order to adhere the sprayed material to the surface being coated. Therefore, in contrast to spraying conventional material, complete melting of the nanostructured raw stock is to be avoided. In this study, the melting and re-solidification of sprayed material is correlated to a spray process parameter that has been introduced in the literature by others. Using computer modeling, processing of zirconia agglomerates with plasma spraying has been simulated. Transition regions of the phase change response of the material to the thermal processing conditions are identified. The retained nanostructure content and liquid fraction of the sprayed material is correlated to the particle diameters, as well as the thermal processing parameter. Finally, a novel method to produce desired coatings composed of partially molten sprayed material, by using a bimodal particle size distribution of the sprayed powder, is presented and discussed.
Sponsorship	Materials Division
Starting Page	133
Ending Page	141
Page Count	9
File Format	PDF
ISBN	0791836401
DOI	10.1115/IMECE2002-33944
Volume Number	Materials: Processing, Characterization and Modeling of Novel Nano-Engineered and Surface Engineered Materials
Conference Proceedings	ASME 2002 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2002-11-17
Publisher Place	New Orleans, Louisiana, USA
Access Restriction	Subscribed
Subject Keyword	Particle size Melting Computer simulation Particulate matter Sprays Nanomaterials Coatings Plasma spraying Plasmas (ionized gases) Optimization Solidification
Content Type	Text
Resource Type	Article

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