Patent
Coating or ablation applicator with a debris recovery attachment
Howard Gabel,Ralph Tapphorn +1 more
Reads0
Chats0
TLDR
In this article, an environmentally compliant applicator and process for coating or ablating a substrate and for retrieving excess or ejected material from the substrate is described. But the applicator is not suitable for the handling of high-energy materials.Abstract:
An environmentally compliant triboelectric applicator and process for coating or ablating a substrate and for retrieving excess or ejected material from the substrate. The applicator comprises an inner supersonic nozzle for accelerating triboelectrically charged projectile particles entrained in a supersonic gas to speeds sufficiently high to coat or ablate a substrate. The applicator further comprises an outer evacuator nozzle coaxially surrounding the inner supersonic nozzle for retrieving excess projectile particles, ablated substrate powders, or other environmentally hazardous materials. A fluid dynamic coupling uses the efficacy of the Mach turning angle associated with a supersonic boundary layer of carrier gas to aspirate the central core of the supersonic two-phase jet. This fluid coupling and spacing between the outlet of the supersonic nozzle and the substrate also permits the substrate to triboelectrically charge to levels which induce electrostatic discharges at the substrate simultaneous to the impacts. The aspiration feature reduces the outlet pressure in the central core of the nozzle below ambient pressure which allows the projectiles to travel unimpeded to the substrate, and reduces the inlet pressure required to achieve parallel and shock-free flow with the inner supersonic nozzle. The powders are injected into the carrier gas using powder feeders modified for high pressure and the ablated debris with excess projectile particles are collected in a particle precipitator and filter unit using a suction blower. A special nozzle applicator embodiment and process for coating or ablating the internal surface of a cylinder bore is also disclosed. This nozzle applicator comprises an axisymmetric cylindrical nozzle for conveying, accelerating, and triboelectrically charging projectile particles entrained in a carrier gas to speeds sufficiently high to coat or ablate the internal surface of the cylinder bore substrate when impacted by a triboelectrically charged jet comprising a central core.read more
Citations
More filters
Journal ArticleDOI
Review on Cold Spray Process and Technology: Part I—Intellectual Property
TL;DR: In this paper, a review on cold spray technology is presented, starting from the first few mentions of the idea at the beginning of the 20th century to its practical discovery in Russia in the 1980s and its subsequent occidental development and commercialization.
Patent
System and process for solid-state deposition and consolidation of high velocity powder particles using thermal plastic deformation
Howard Gabel,Ralph Tapphorn +1 more
TL;DR: In this article, an apparatus and process for solid-state deposition and consolidation of powder particles entrained in a subsonic or sonic gas jet onto the surface of an object is described.
Patent
Kinetic spray coating method and apparatus
Steenkiste Thomas H. Van,John R. Smith,Richard E. Teets,Jerome J. Moleski,Daniel W. Gorkiewicz +4 more
TL;DR: In this article, a method and apparatus for kinetic spray coating of substrate surfaces by impingement of air or gas entrained powders of small particles in a range up to at least 106 microns accelerated to supersonic velocity in a spray nozzle is disclosed.
Patent
Thermal barrier coating applied with cold spray technique
TL;DR: In this paper, a process for applying a thermal barrier coating (51) to a turbine component (50) including the step of depsoiting a bond coating layer (56) by a cold spray process is described, which allows the surface of the bond coating material layer to be formed with a predetermined surface roughness or with a plurality of micro-ridges.
Patent
Cold spray repair process
TL;DR: In this article, a cold spray process was used to provide a grit blasting effect prior to depositing the material in order to remove contaminants ( 48 ) from the surface of the part.
References
More filters
Patent
Gas-dynamic spraying method for applying a coating
Anatoly Pavlovich Alkhimov,Anatoly Nikiforovich Papyrin,Vladimir Fedorovich Kosarev,Nikolai Ivanovich Nesterovich,Mikhail Mikhailovich Shushpanov +4 more
TL;DR: In this article, a cold gas-dynamic spraying method for applying a coating to an article introduces into a gas particles of a powder of a metal, alloy, polymer or mechanical mixture of metal and an alloy, the particles having a particle size of from about 1 to about 50 microns.
Patent
Method for microwave plasma assisted supersonic gas jet deposition of thin films
J. J. Schmitt,B. L. Halpern +1 more
TL;DR: In this paper, a thin film is formed on a substrate positioned in a vacuum chamber by use of a gas jet apparatus affixed to a vacuum-chamber port and having an outer nozzle with an interior cavity into which carrier gas is fed, an inner nozzle located within the outer nozzle interior cavity, a tip of the inner nozzle being recessed from the vacuum chamber port within the inner cavity, and a microwave discharge device configured about the apparatus for generating a discharge in the carrier gas and reactant gas.
Journal Article
A Method of Cold Gas-Dynamic Deposition
Patent
Blasting machine utilizing sublimable particles
TL;DR: In this article, a blasting machine utilizing sublimable particles comprising forming means (14) for producing particles having a substantially uniform length, dispensing means (32) for receiving the particles and for introducing the particles into a low pressure transport gas flow, and a nozzle (44) for accelerating the particles.
Patent
Sandblasting with pellets of material capable of sublimation
TL;DR: In this paper, a sandblasting process in which the particles are propelled against a surface by a stream of pressurized gas requires careful control of a number of interrelated factors, such as sharp edges and corners, alpha radiation exposure, and discharge of the particles against the surface being treated through a so-called "sonic nozzle".