摘要:
Process for producing an element comprising a multilayer architecture, the layers of which comprise primary channels on their upper faces, said process comprising the following successive steps: (a) producing secondary channels on the lower faces of each layer, each secondary channel being intended to be facing a primary channel of the neighboring lower layer within the architecture, (b) depositing a coating that protects against oxidation at a temperature of between 500° C. and 1000° C. and against corrosion over all of the lower and upper surfaces of the layers, (c) sanding or mechanical cleaning of the surfaces intended to be assembled, and (d) assembling via superposition of the various layers so that each secondary channel of a lower face of an upper layer is facing and is centered on a primary channel of the neighboring lower layer, the width of each secondary channel being greater than the width of the primary channel which it is facing within the architecture.
摘要:
Process for depositing a coating on a substrate having at least one cavity, comprising a step of mixing ground powders of an activating agent and a powder of the metal or of the alloy to be deposited on the substrate that were ground in step a) and a liquid so as to form a suspension, and a step of applying the suspension to the portion of the substrate to be coated.
摘要:
Process for depositing a corrosion-protection coating on at least one portion of the surfaces of a metallic substrate having at least one cavity with an equivalent diameter emm
摘要:
The invention relates to a compact catalytic reactor comprising at least three plates with at least one area of millimetric channels on each plate, promoting heat exchange, and at least one distribution area upstream and/or downstream of the area of millimetric channels, the channels being separated by walls. The distribution areas are characterized by:the discontinuity of the walls along the distribution area on the side of the inflow of gaseous flows or on the side of the outflow thereof; andthe increase in the width of the walls along the distribution area on the side of the inflow of gaseous flows or on the side of the outflow thereof.
摘要:
The use of a cement in a process for pack cementation deposition on a substrate having cavities of minimum equivalent diameter ecm, characterized in that the cement consists of spherical particles each having a diameter d such that d≦ecm/10.