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US 8,475,134 B2Granted
Method for fitting and protecting a sensor on a substrate
AssigneeSnecma
InventorsCharly Buleon, Frederic Leman, Etienne Tulie
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Abstract
The method consists in depositing, by alumina spraying, an electrically insulating sublayer on the substrate, then in placing the sensor on the electrically insulating sublayer and finally in depositing, by alumina spraying, a cover layer on the sensor and the electrically insulating sublayer. It further includes, before the cover layer is deposited, a step in which an impermeable and thermally insulating cement is applied locally on wires of the sensor.
Claims8
A method for fitting and protecting a sensor on a substrate intended to be subjected to high temperatures, above 900° C., comprising:
- depositing, by alumina spraying, an electrically insulating sublayer on said substrate;
- positioning and placing the sensor on said electrically insulating sublayer;
- immobilizing the sensor placed on said electrically insulating sublayer;
- applying an impermeable and thermally insulating cement locally on connection wires of the sensor so as to encapsulate the wires of the sensor;
- and
- depositing, by alumina spraying, a cover layer on the sensor, the encapsulated connection wires of the sensor, and the electrically insulating sublayer,
- wherein the cement is impermeable at a temperature above 900° C., is as insulating as alumina, and includes a material which is denser than the alumina of the cover layer.
4 more elements
Dependencies are inferred from the claim text.