Abstract: A detection method of a sensor in a gas turbine includes adopting a pressure sensor to measure a pushing force of a push rod; measuring a first rotational angle of a guide vane where a first angle sensor is mounted; measuring a second rotational angle of the guide vane where a second angle sensor is mounted; obtaining a maximum measured rotational angle deviation from the absolute value of a difference value between the first and second rotational angles; calculating a maximum calculated deviation from the pushing force of the push rod; calculating the absolute value of a difference value between the maximum measured deviation and the maximum calculated deviation; and determining that the angle sensors and the pressure sensor have appropriate measurement accuracy; or, if the absolute value is greater than the standard value, determining that the angle and/or pressure sensors require calibration.

Abstract: A layer system with ceramic layers includes a substrate, a MCrAl(X) layer, which has an oxide layer on the substrate, a lowermost ceramic layer, an outer pyrochlore layer, and a central ceramic layer. The central ceramic layer has a higher porosity at least partially than the outer pyrochlore layer.

Abstract: A method for checking cooling holes of a gas turbine blade, including in sequence: step 1: injecting a liquid plastic material into a cooling hole of a gas turbine blade; step 2: stopping the flow of the liquid plastic material, and curing the liquid plastic material to form a model; step 3: separating the model from the gas turbine blade; step 4: scanning the model. By scanning the model, the cooling holes of the gas turbine blade can be checked, so as to obtain more data about the position, dimensions and shape thereof, while improving the accuracy and efficiency of measurement.

Abstract: A layer system with ceramic layers includes a substrate, a MCrAl(X) layer, which has an oxide layer on the substrate, a lowermost ceramic layer, an outer pyrochlore layer, and a central ceramic layer. The central ceramic layer has a higher porosity at least partially than the outer pyrochlore layer.