The concept is to introduce powdered
materials into detonation or shock waves. The "waves" are produced by igniting a
mixture of acetylene and oxygen into the detonation chamber which is opened to a
one meter long tube two and one-half centimeters in diameter.
In operation, a mixture of spray
material, acetylene and oxygen is injected into the detonation chamber. The
procedure is initiated by a gas/powder metering system that measures and
delivers the mixture to the chamber where it is ignited. The resulting shock
wave accelerates the powder particles to over 731 m/sec (2,400 ft/sec) and
produces temperatures in excess of 4,000°C (7,232°). Pressures from the
detonation close the controlling valves until the chamber pressure is equalized.
When this occurs the cycle may be repeated either 4 or 8 times per second.
Application fields: increasing
hardness, wear-resistance, durability, and reliability; protection against
cavitation, erosion, corrosion, and chemicals;