Abstract: A system for cooling and holding a testpiece in an effective manner while the testpiece is subjected locally to high heat flux. The testpiece includes an inside face extended by parallel strips that leave between them channels for passing a cooling fluid, and parallel fins of an intermediate part are inserted between the strips.

Abstract: A system for cooling and holding a testpiece in an effective manner while the testpiece is subjected locally to high heat flux. The testpiece includes an inside face extended by parallel strips that leave between them channels for passing a cooling fluid, and parallel fins of an intermediate part are inserted between the strips.

Abstract: The invention relates to a method of depositing a coating on a part having its surface made of silicon carbide. The method comprises the following steps: a) applying laser treatment to the SiC surface by superposing laser impacts for the purpose of increasing the roughness of said surface; and b) depositing a coating on the SiC surface by atmospheric thermal spraying. The invention also provides a device for measuring deformation, which device comprises a first alumina coating obtained by atmospheric thermal spraying onto the silicon carbide layer covering the substrate of the part after it has been treated by superposing laser impacts, a free filament strain gauge placed on the coating, and an additional alumina coating obtained by atmospheric thermal spraying onto the strain gauge.

Abstract: A method of making a device for measuring deformation includes a step of depositing a silicon adhesion underlayer on a silicon carbide surface by chemical vapor spraying, and a step of depositing a coating on the silicon adhesion underlayer by atmospheric thermal spraying.

Abstract: The invention relates to a method of depositing a coating on a part having its surface made of silicon carbide. The method comprises the following steps: a) applying laser treatment to the SiC surface by superposing laser impacts for the purpose of increasing the roughness of said surface; and b) depositing a coating on the SiC surface by atmospheric thermal spraying. The invention also provides a device for measuring deformation, which device comprises a first alumina coating obtained by atmospheric thermal spraying onto the silicon carbide layer covering the substrate of the part after it has been treated by superposing laser impacts, a free filament strain gauge placed on the coating, and an additional alumina coating obtained by atmospheric thermal spraying onto the strain gauge.

Abstract: The invention relates to a method of depositing an alumina coating on a part having a silicon carbide surface. The method comprises the following steps: a) depositing a silicon adhesion underlayer on the SiC surface by chemical vapor spraying; and b) depositing a coating on the silicon adhesion underlayer by atmospheric thermal spraying. The invention also provides a device for measuring deformation, which device comprises a first alumina coating obtained by atmospheric thermal spraying onto the silicon adhesion underlayer deposited on the silicon carbide layer covering the substrate of the part, a free filament strain gauge placed on the coating, and an additional alumina coating obtained by atmospheric thermal spraying onto the strain gauge.

Abstract: A powder material for forming an abradable coating, the material comprising a metal powder based for the most part on aluminum and containing manganese or calcium. The material is applicable to seals of a turbomachine.

Abstract: The invention concerns a method which consists in maintaining the two ends (2, 4) of the bar (1) on the end supports (3, 5) of a frame (10), one of the ends (2) being maintained fixed, and in driving the bar in rotation. The invention is characterised in that it consists further in drawing the bar (1) while spraying a coat on the bar, the drawing of the bar corresponding to an elongation of about 0.2 to 0.001%.

Abstract: A powder material for forming an abradable coating, the material comprising a metal powder based for the most part on aluminum and containing manganese or calcium. The material is applicable to seals of a turbomachine.

Abstract: The invention concerns a non-stick coating (4) for cooking utensils (1) characterized in that it is selected among the group comprising (a) ceramics alone selected among titanium oxynitride, titanium suboxides, titanium subnitrides, spinels, mixed spinels; and (b) ceramo-metallic mixtures wherein the ceramics are selected among titanium oxynitrides, titanium suboxides, titanium subnitrides, spinels, cerium fluoride, silicon carbide, pyrolitic carbon, boron carbide, and the metal is titanium.

Abstract: The invention concerns a coating bar for pulp and paper manufacture, comprising a substrate coated over at least the greater part of its surface with a coat comprising a ceramic, characterised in that the coat consists of a mixture of ceramics, the coat having a wettability angle between 30° and 90°, and porosity less than 5%, the size of the pores being less than 5 &mgr;m.

Abstract: The invention concerns a method which consists in maintaining the two ends (2, 4) of the bar (1) on the end supports (3, 5) of a frame (10), one of the ends (2) being maintained fixed, and in driving the bar in rotation. The invention is characterised in that it consists further in drawing the bar (1) while spraying a coat on the bar, the drawing of the bar corresponding to an elongation of about 0.2 to 0.001%.

Abstract: Nonstick ceramo-metallic coating for cooking utensils The invention concerns a non-stick coating (4) for cooking utensils (1) characterized in that it is selected among the group comprising (a) ceramics alone selected among titanium oxynitride, titanium suboxides, titanium subnitrides, spinels, mixed spinels ; and (b) ceramo-metallic mixtures wherein the ceramics are selected among titanium oxynitrides, titanium suboxides, titanium subnitrides, spinels, cerium fluoride, silicon carbide, pyrolitic carbon, boron carbide, and the metal is titanium.

Abstract: A regenerative circuit structure is built up by implementing the following steps in particular: an intermediate layer is made on a support core representing the inner profile of the structure; a series of channels regularly distributed around the core is made with the channels opening to face the intermediate layer, each of the channels being provided with a soluble insert; the support core is preheated and the body of the structure is made by thermal spraying under a vacuum; channels are machined in the body from the outside, and said channels are filled by means of soluble inserts; a closure layer is formed to close the channels in the body, and an outer envelope is formed by thermal spraying under a vacuum, after preheating; and all of the soluble inserts and the intermediate layer are eliminated.

Abstract: A regenerative circuit structure is built up by implementing the following steps in particular: an intermediate layer is made on a support core representing the inner profile of the structure; a series of channels regularly distributed around the core is made with the channels opening to face the intermediate layer, each of the channels being provided with a soluble insert; the support core is preheated and the body of the structure is made by thermal spraying under a vacuum; channels are machined in the body from the outside, and said channels are filled by means of soluble inserts; a closure layer is formed to close the channels in the body, and an outer envelope is formed by thermal spraying under a vacuum, after preheating; and all of the soluble inserts and the intermediate layer are eliminated.

Abstract: Heat-treatment device which includes a cooling unit comprising delivery nozzles which deliver at least one coolant, characterized in that it furthermore comprises a shielding element designed so as to maintain a gaseous shielding atmosphere around at least part of the delivery nozzles.