Device for measuring deformations and process for producing the same

摘要

The process for performing an alumina coating on a turbomachine part having silicon carbide surface for the production of a deformation measurement device, comprises depositing a silicon underlayer (20) on the silicon carbide surface by plasma projection under vacuum, depositing a first alumina coat (30) on the silicon underlayer by atmospheric thermal projection, exposing gauge of deformations of free filament maintained on its support with openings on the first coat, depositing a second alumina coat on the gauge of deformations and first coat through the openings, and removing the support. The process for performing an alumina coating on a turbomachine part having silicon carbide surface for the production of a deformation measurement device, comprises depositing a silicon underlayer (20) on the silicon carbide surface by plasma projection under vacuum, depositing a first alumina coat (30) on the silicon underlayer by atmospheric thermal projection, exposing gauge of deformations of free filament maintained on its support with openings on the first coat, depositing a second alumina coat on the gauge of deformations and first coat through the openings, removing the support, and depositing a third alumina coat on the first and second coats and gauge of deformations. The deposition of the coats is carried out by atmospheric thermal projection. The part is constituted of a substrate (10) covered by a silicon carbide layer (12), which is deposited by chemical vapor deposition. The silicon underlayer has a thickness of 50-70 microns. The atmospheric thermal projection is selected between plasma projection and flame projection. The substrate has a composite material with silicon carbide matrix and a material with auto-healing ceramic matrix. Independent claims are included for: (1) a deformation measurement device; and (2) a turbomachine part.