Abstract: In a method is provided for removing a material from a substrate, a plasma is generated at atmospheric pressure. The plasma includes an energetic species reactive with one or more components of the material. The plasma is flowed from an outlet as a plasma plume that includes periodic regions of high plasma density and low plasma density. The material is exposed to the plasma plume. At least one component of the material reacts with the energetic species, and at least one other component of the material is physically impacted and moved by one or more of the regions of high plasma density.

Abstract: In a method is provided for removing a material from a substrate, a plasma is generated at atmospheric pressure. The plasma includes an energetic species reactive with one or more components of the material. The plasma is flowed from an outlet as a plasma plume that includes periodic regions of high plasma density and low plasma density. The material is exposed to the plasma plume. At least one component of the material reacts with the energetic species, and at least one other component of the material is physically impacted and moved by one or more of the regions of high plasma density.

Abstract: In a method is provided for removing a material from a substrate, a plasma is generated at atmospheric pressure. The plasma includes an energetic species reactive with one or more components of the material. The plasma is flowed from an outlet as a plasma plume that includes periodic regions of high plasma density and low plasma density. The material is exposed to the plasma plume. At least one component of the material reacts with the energetic species, and at least one other component of the material is physically impacted and moved by one or more of the regions of high plasma density.

Abstract: An adhesion promoting layer is formed on a metallic substrate by generating a non-thermal plasma in air at atmospheric pressure, and exposing a surface of the metallic substrate to the plasma. The plasma oxidizes the metallic substrate to form metal oxide from metal atoms of the metallic substrate. The metal oxide is formed as a metal oxide layer disposed directly on an underlying bulk metallic layer of the metallic substrate. Alternatively, the plasma nitridizes the metallic substrate to form metal nitride from metal atoms of the metallic substrate. The metal nitride is formed as a metal nitride layer disposed directly on an underlying bulk metallic layer of the metallic substrate.

Abstract: An adhesion promoting layer is formed on a metallic substrate by generating a non-thermal plasma in air at atmospheric pressure, and exposing a surface of the metallic substrate to the plasma. The plasma oxidizes the metallic substrate to form metal oxide from metal atoms of the metallic substrate. The metal oxide is formed as a metal oxide layer disposed directly on an underlying bulk metallic layer of the metallic substrate. Alternatively, the plasma nitridizes the metallic substrate to form metal nitride from metal atoms of the metallic substrate. The metal nitride is formed as a metal nitride layer disposed directly on an underlying bulk metallic layer of the metallic substrate.

Abstract: A method for cleaning a surface of a substrate with an atmospheric pressure plasma process in which a plasma is generated at atmospheric pressure. The plasma has an energetic species reactive with one or more components of an undesirable material on the substrate. In this method, the plasma flows from a nozzle exit as a plasma plume exiting into an ambient environment, and the surface of the substrate is exposed to the energetic species in the plasma plume, thereby producing an activated surface capable of adhering on contact a coating material to the activated surface.

Abstract: An adhesion promoting layer is formed on a metallic substrate by generating a non-thermal plasma in air at atmospheric pressure, and exposing a surface of the metallic substrate to the plasma. The plasma oxidizes the metallic substrate to form metal oxide from metal atoms of the metallic substrate. The metal oxide is formed as a metal oxide layer disposed directly on an underlying bulk metallic layer of the metallic substrate. Alternatively, the plasma nitridizes the metallic substrate to form metal nitride from metal atoms of the metallic substrate. The metal nitride is formed as a metal nitride layer disposed directly on an underlying bulk metallic layer of the metallic substrate.

Abstract: In a method is provided for removing a material from a substrate, a plasma is generated at atmospheric pressure. The plasma includes an energetic species reactive with one or more components of the material. The plasma is flowed from an outlet as a plasma plume that includes periodic regions of high plasma density and low plasma density. The material is exposed to the plasma plume. At least one component of the material reacts with the energetic species, and at least one other component of the material is physically impacted and moved by one or more of the regions of high plasma density.

Abstract: An adhesion promoting layer is formed on a metallic substrate by generating a non-thermal plasma in air at atmospheric pressure, and exposing a surface of the metallic substrate to the plasma. The plasma oxidizes the metallic substrate to form metal oxide from metal atoms of the metallic substrate. The metal oxide is formed as a metal oxide layer disposed directly on an underlying bulk metallic layer of the metallic substrate. Alternatively, the plasma nitridizes the metallic substrate to form metal nitride from metal atoms of the metallic substrate. The metal nitride is formed as a metal nitride layer disposed directly on an underlying bulk metallic layer of the metallic substrate.

Abstract: In a method is provided for removing a material from a substrate, a plasma is generated at atmospheric pressure. The plasma includes an energetic species reactive with one or more components of the material. The plasma is flowed from an outlet as a plasma plume that includes periodic regions of high plasma density and low plasma density. The material is exposed to the plasma plume. At least one component of the material reacts with the energetic species, and at least one other component of the material is physically impacted and moved by one or more of the regions of high plasma density.

Abstract: Methods to promote adhesion of coatings on surfaces, such as promoting adhesion of arc-spray coatings or thermal-spray coatings onto surfaces such as metallic or ceramic surfaces. The method applies a non-thermal plasma stream at atmospheric pressure to an article surface, creating an energized surface region that promotes adhesion of an arc-spray coating. In one aspect, the arc-spray coating is applied onto a metallic or ceramic surface.

Abstract: An adhesion promoting layer is formed on a metallic substrate by generating a non-thermal plasma in air at atmospheric pressure, and exposing a surface of the metallic substrate to the plasma. The plasma oxidizes the metallic substrate to form metal oxide from metal atoms of the metallic substrate. The metal oxide is formed as a metal oxide layer disposed directly on an underlying bulk metallic layer of the metallic substrate. Alternatively, the plasma nitridizes the metallic substrate to form metal nitride from metal atoms of the metallic substrate. The metal nitride is formed as a metal nitride layer disposed directly on an underlying bulk metallic layer of the metallic substrate.

Abstract: An atmospheric pressure plasma source includes a body including a distal end, a blade extending from the distal end and terminating at a blade edge, a plasma-generating unit, and a plasma outlet communicating with the plasma-generating unit and positioned at the distal end. The plasma outlet is oriented at a downward angle generally toward the blade edge, wherein the plasma outlet provides a plasma path directed generally toward the blade edge. The plasma may be applied to the coating at an interface between the coating and an underlying substrate. While applying the plasma, the blade is moved into contact with the coating at the interface, wherein the blade assists in separating the coating from the substrate while one or more components of the coating react with energetic species of the plasma.

Abstract: An atmospheric pressure plasma source includes a body including a distal end, a blade extending from the distal end and terminating at a blade edge, a plasma-generating unit, and a plasma outlet communicating with the plasma-generating unit and positioned at the distal end. The plasma outlet is oriented at a downward angle generally toward the blade edge, wherein the plasma outlet provides a plasma path directed generally toward the blade edge. The plasma may be applied to the coating at an interface between the coating and an underlying substrate. While applying the plasma, the blade is moved into contact with the coating at the interface, wherein the blade assists in separating the coating from the substrate while one or more components of the coating react with energetic species of the plasma.

Abstract: An atmospheric pressure plasma source includes a body including a distal end, a blade extending from the distal end and terminating at a blade edge, a plasma-generating unit, and a plasma outlet communicating with the plasma-generating unit and positioned at the distal end. The plasma outlet is oriented at a downward angle generally toward the blade edge, wherein the plasma outlet provides a plasma path directed generally toward the blade edge. The plasma may be applied to the coating at an interface between the coating and an underlying substrate. While applying the plasma, the blade is moved into contact with the coating at the interface, wherein the blade assists in separating the coating from the substrate while one or more components of the coating react with energetic species of the plasma.

Abstract: An atmospheric pressure plasma source includes a body including a distal end, a blade extending from the distal end and terminating at a blade edge, a plasma-generating unit, and a plasma outlet communicating with the plasma-generating unit and positioned at the distal end. The plasma outlet is oriented at a downward angle generally toward the blade edge, wherein the plasma outlet provides a plasma path directed generally toward the blade edge. The plasma may be applied to the coating at an interface between the coating and an underlying substrate. While applying the plasma, the blade is moved into contact with the coating at the interface, wherein the blade assists in separating the coating from the substrate while one or more components of the coating react with energetic species of the plasma.

Abstract: In a method is provided for removing a material from a substrate, a plasma is generated at atmospheric pressure. The plasma includes an energetic species reactive with one or more components of the material. The plasma is flowed from an outlet as a plasma plume that includes periodic regions of high plasma density and low plasma density. The material is exposed to the plasma plume. At least one component of the material reacts with the energetic species, and at least one other component of the material is physically impacted and moved by one or more of the regions of high plasma density.