A powder feeder for a cold spray system includes a rotatable drum body, a housing surrounding the drum body, and a support structure. The support structure couples to the housing and supports the housing such that the drum body rotates about a rotation axis to provide in-situ blending of powder disposed within an interior of the drum body.

A new spray process allows for deposition below a critical velocity limit of cold spray, while providing adhesion. Post deposition heat treatment has shown excellent coating strength. A wide variety of materials can be deposited. The spray process is based on ShockWave Induced Spraying (SWIS) but with much slower spray jet projection velocities. High porosity, pore size control, and porosity control are demonstrated to be controllable. Preheating of feedstock and uniform temperature of the SWIS delivery allow for the deposition below critical velocity.

A nozzle arrangement for use in expelling pressurized fluid includes a dead man control. The dead man control has a manually operable control part movable between a non-operating position, which prevents operation of the nozzle arrangement, and an operating position, and biased towards the non-operating position. The manually operable control part is pivotably coupled relative to a nozzle holder of the nozzle arrangement, which extends away from the pivotal coupling substantially towards a distal end of a nozzle part of the nozzle arrangement. The manually operable control part includes a handle part which in the operating position is substantially against and aligned with the nozzle part.

Aerosol-deposited thermographic phosphors can be used for non-contact, two-dimensional temperature sensing in extreme environments. The fast response time and thermal/environmental stability of doped ceramic powders allow for temperature measurements up to the melting point of the phosphor on hot surfaces, such as rapidly rotating turbine components and combustors.

A powder suction and discharge apparatus including a pipe, a container that is coupled to the pipe, a valve that opens and closes a passage of the pipe, and a pressure reducing mechanism that causes an internal space of the container to have negative pressure, in which in a first state in which the valve is open and the pressure reducing mechanism is driven, powder is sucked into the container through the pipe, in a second state in which the valve is closed, the sucked powder is stored in the container, and in a third state in which the valve is open, the stored powder is discharged through the pipe.

Radiation shield and methods for manufacturing a radiation shield are provided herein, the method includes identifying a substrate for the radiation shield; identifying at least one material for cold spraying on the substrate; applying by cold spray a coating of the at least one material on the substrate thereby obtaining a radiation shield. The radiation shield is lighter, thinner, and more efficient compared to conventional radiation shields.

A powder feed assembly comprises a powder hopper, a motor, an auger housing, an auger, a porous gas-permeable powder filter, a carrier gas inlet, an auger sleeve, and a powder hose. The auger housing receives a powder from the opening in the hopper floor into a powder chamber defined in the auger housing. The auger is selectively rotatable to propel the powder from the powder chamber past the distal end of the auger and into the auger sleeve. The carrier gas inlet introduces carrier gas into an inner chamber of the auger housing. The wall of the auger sleeve allows at least some of the carrier gas to flow or permeate into the internal bore of the auger sleeve to pick up and carry the propelled powder out of the auger housing. The powder hose directs the carrier gas and carried powder from the auger housing to a powder dispenser.

A powder conveyor has a pneumatically actuated dense phase powder pump and a pressure controller. The dense phase powder pump comprises at least one conveyor chamber having a powder inlet valve and a powder outlet valve. The pressure controller can be used to adjust and maintain a set pressure on the at least one conveyor chamber of the dense phase powder pump that is or can be previously defined and/or to adjust and maintain an actuation pressure on the powder inlet valve or the powder outlet valve that is or can be previously defined. The powder conveyor further comprises a gas flow detection device for detecting or determining a quantity of gas that is fed or removed per time unit when the set pressure is adjusted and maintained on the at least one conveyor chamber or a quantity of gas that is fed to the powder inlet valve or the powder outlet valve per time unit when the actuation pressure is adjusted and maintained. An evaluation device compares at least one detected or determined gas flow value with a corresponding set value and automatically generates an error and/or alarm signal when a deviation is detected.

A powder feeder for a cold spray system includes a rotatable drum body, a housing surrounding the drum body, and a support structure. The support structure couples to the housing and supports the housing such that the drum body rotates about a rotation axis to provide in-situ blending of powder disposed within an interior of the drum body.

Therapeutic powder applicators and their methods of operation are described. In some embodiments, a first flow of gas may flow through a distal porous portion of a chamber containing a therapeutic powder. This gas may fluidize and entrain the therapeutic powder and flow the entrained powder through an outlet that is in fluid communication with the chamber.