Cold Gas Dynamic Spray CGSM Apparatus

TevTech has been granted a license to manufacture and sell the COLD GAS DYNAMIC SPRAY CGSM APPARATUS for use in the Cold Gas Dynamic Spray Method, U.S. Patent No. 5,302,414. The Cold Gas Dynamic Spray (CGSM) process is where high pressure inert gas is delivered at a controlled rate at a controlled temperature to a supersonic jet nozzle to deposit materials at relatively low temperatures.

COLD GAS DYNAMIC SPRAY METHOD

The CGSM process was developed with the ideology that each coating should be applied at as low a temperature as possible. Why should coatings of many materials be applied at 1000-1500oC if similar or better results can be achieved, at a lower cost, at 100-300oC?

• CGSM is a spray process providing the coating formation from particles in solid state.
• CGSM is an opportunity to apply coatings of many metals, alloys and composites at temperatures of 20-500 oC.
• CGSM is a simple and inexpensive apparatus that doesn’t require plasma, arc, detonation, or combustion equipment for heating the jet. The apparatus and support equipment are commercially available.

• Coatings are produced with properties close to those of the initial particle materials, i.e. low oxide levels, etc., and with a low level of residual stress.
• Coatings can be produced with materials with ~1-50micron particle size. Un-deposited particles can also be collected and reused.
• Coatings can be deposited on materials that cannot withstand the high temperatures of other coating methods.
• Thick coatings can be produced to allow for free standing structures or for rapid prototyping.
• Increased operational safety due to the absence of high temperature jets and radiation, low noise level (70-80dB), and the simplicity of technical implementation and operation.
• A wide spectrum of materials – metals, alloys, composites, and blends, can be deposited, for example: Aluminum, Copper, Zinc, Cadmium, Tin, Titanium, Nickel, Iron, Cobalt, Vanadium, Molybdenum, Silver, Niobium, Rhenium, Al Alloys-15 Silicon Carbide (blend), Ni-20Graphite, etc.

• High Pressure Inert Gas Source
• TevTech CGSM System - Powder Feeder (LINK), Gas Distribution Panel, Gas Heater (LINK), Power Supply, Supersonic Spray Nozzle, Control Panel, operation license.
• Substrate Holder, Manipulator
• Dust Collection System/Ventilation

TEVTECH GAS HEATER

The TevTech Gas Heater was developed for use in the Cold Gas Dynamic Spray Method, U.S. Patent No. 5,302,414, where high pressure inert gas is delivered at a controlled rate at a controlled temperature to a supersonic jet nozzle to deposit materials at relatively low temperatures.

SYSTEM CAPABILITY AND FEATURES

• Delivers from 5-50 scfm of high pressure inert gas up to 300 psig at temperatures of up to 500 oC to the Cold Spray process.
• Temperature measured at the nozzle by a thermocouple and controlled by proportional temperature controller and integrated power supply. Heat up time is less than 2 minutes.
• Six standard flow gas flow rate ranges available for a wide range of applications.
• High pressure gas flow distribution panel includes flow control, pressure indication, isolation valves, and connection for flow to the powder feeder.
• System controls are housed in a NEMA 4 electrical enclosure for ease of installation and maintenance.
• Supersonic spray nozzles are available in a variety of outlet cross section configurations. Each type is constructed in multiple stages for easy cleaning, and has an adjustable powder inlet connection.

TEVTECH POWDER FEEDER

Adjustable Rate Powder Feeder for Various Materials
The TevTech Powder Feeder was developed for use in the Cold Gas Dynamic Spray Method, U.S. Patent No. 5,302,414, where powders need to be delivered at a controlled rate at high pressures to a supersonic jet nozzle to deposit materials at relatively low temperatures.

click on image to enlage

SYSTEM CAPABILITY AND FEATURES

• Delivers powders to processes such as Cold Spray, CVD, CVC, etc., at a controllable rate.
• Can be used from vacuum to 300 psig. Higher pressures available by request.
• Small reservoir volume – 185 cc, for use in process development; allows for the quick changing of powders, or the use of small quantities of expensive materials. Larger reservoir volumes for production use are available by request.
• Includes pressure relief valve as a safeguard of over pressurization due to downstream clogging or supply regulator failure.
• System is housed in a 20" X 20" X 8" NEMA 4 electrical enclosure for ease of installation and maintenance.
• System can be custom tailored for many delivery rate ranges, reservoir sizes, pressure ratings, etc., for many applications.

Material Delivery Ranges:
(From .089 to 1.67 cc/sec.)