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Article
Process-based quality for thermal spray via feedback control
Quality control of a thermal spray system manufacturing process is difficult due to the many input variables that need to be controlled. Great care must be taken to ensure that the process remains constant to ...
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Article
The effect of a simple annealing heat treatment on the mechanical properties of cold-sprayed aluminum
Cold spray, a new member of the thermal spray process family, can be used to prepare dense, thick metal coatings. It has tremendous potential as a spray-forming process. However, it is well known that signific...
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Article
Impact of high velocity cold spray particles
This article presents experimental data and a computational model of the cold spray solid particle impact process. Copper particles impacting onto a polished stainless steel substrate were examined in this stu...
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Article
Particle velocity and deposition efficiency in the cold spray process
Copper powder was sprayed by the cold gas-dynamic method. In-flight particle velocities were measured with a laser two-focus system as a function of process parameters such as gas temperature, gas pressure, an...
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Article
Oxidation in wire HVOF-sprayed steel
It is widely held that most oxidation in thermally sprayed coatings occurs on the surface of the droplet after it has flattened. Evidence in this paper suggests that, for the conditions studied here, oxidation...
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Article
Cold Spray Direct Fabrication - High Rate, Solid State, Material Consolidation
Direct fabrication of metal near-net shapes from a computer model typically involves melting and solidification, which can cause high residual stresses, undesirable phases, poor microstructures, rough surface ...
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Article
Computational fluid dynamics analysis of a wire-feed, high-velocity oxygen fuel (HVOF) thermal spray torch
The fluid and particle dynamics of a high-velocity oxygen fuel (HVOF) thermal spray torch are analyzed using computational and experimental techniques. Three-dimensional computational fluid dynamics (CFD) resu...
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Article
Surface roughness of thermal spray coatings made with off-normal spray angles
The formation of a thermal spray coating using an off-normal direction angle for the spray has been analyzed to identify the causes of the large surface roughness of the coating. In the analysis, the string me...
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Article
Evaluation of plasma-sprayed tungsten for fusion reactors
Tungsten coatings are being considered for a variety of uses inside fusion reactors. Measurements of several properties of vacuum plasma- sprayed tungsten important for fusion energy applications are reported....
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Article
A structural investigation of a plasma sprayed Ni-Cr based alloy coating
A Ni-Cr based hardfacing alloy has been plasma sprayed in ambient and low pressure atmospheres onto mild steel substrates. These coatings exhibit excellent wear and corrosion resistance; however, the significa...
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Article
Photoacoustic signal enhancement at visible and X-ray wavelengths
Good agreement between theory and experiment is found for photoacoustic (PA) signal enhancement by volatile liquids adsorbed on solid samples in a microphonic cell illuminated with visible light. When the same...
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Article
Electrical, Chemical, and Structural Properties of Plasma Sprayed Y-Ba-Cu-Oxide Superconducting Coatings
Thick coatings of Y-Ba-Cu-oxide superconductors have been prepared by plasma spray processing. This paper reports a number of the important properties of coatings sprayed at two different power levels. The mic...
