METHODS FOR MAKING A CONTACT TEMPERATURE SENSOR AND METHOD FOR CALIBRATING SAID SENSOR

摘要

The invention relates to a method for making a contact temperature sensor to be used at an exploitation temperature T<SUB>u</SUB>, that comprises the following steps: a) providing a carbon fibre having a length L and a micrometric diameter; b) thermally processing the fibre at a temperature T<SUB>1</SUB> higher than 800°C and higher than the sensor exploitation temperature T<SUB>u</SUB>; full-layer deposition onto the fibre, at a deposition temperature T<SUB>D</SUB>, of a coating layer of an electrically insulating ceramic material that is stable at the sensor exploitation temperature T<SUB>u</SUB>, the ceramic material being selected from silica (SiO<SUB>2</SUB>), zirconia (ZrO<SUB>2</SUB>), and alumina (A1<SUB>2</SUB>O<SUB>3</SUB>); d) thermally processing the fibre coated with the coating layer at a temperature T<SUB>2</SUB> higher than the coating layer deposition temperature T<SUB>D</SUB> and higher than the sensor exploitation temperature. The invention also relates to a method for making a contact temperature sensor, that comprises the above a) and b) steps as well as the following steps: c') full-layer deposition onto the fibre, at a deposition temperature T<SUB>D1</SUB>, of a first coating layer of if silicon carbide; d') full-layer deposition onto the first coating layer, at a deposition temperature T<SUB>D2</SUB>, of a second coating layer of boron nitride; thermally processing the fibre thus obtained at a temperature T2 higher than the deposition temperatures T<SUB>D1</SUB> et T<SUB>D2</SUB> and higher than the sensor exploitation temperature T<SUB>u</SUB>.