摘要:
Disclosed is a gas turbine blade (1) having a ceramic heat-insulating layer (17). The ceramic heat-insulating layer (17) consists of 10-95% wt. % magnesium aluminate, 5-90 wt. % magnesium oxide and 0-20 wt. % aluminum oxide. Magnesium oxide particles are incorporated into a matrix made of spindle-shaped magnesium aluminate, enabling the thermal expansion coefficient of the ceramic heat-insulating layer (17) to be adapted in a particularly suitable manner to a metallic base body (15) of the gas turbine blade (1). The ceramic heat-insulating layer (17) also has a porosity which is greater that 3 vol. %, thereby guaranteeing sufficiently low heat conductivity.
摘要:
Thermal barrier coating layer systems, in addition to good thermal barrier properties, also have to have a long service life of the thermal barrier coating. The layer system according to the invention comprises a specially adapted layer sequence of metallic bonding layer, inner ceramic layer and outer ceramic layer.
摘要:
Ceramic coatings for a component that is subjected to high temperatures, especially for a turbine blade are provided. The ceramic coatings contain one or more compounds that are selected from alkaline earth silicates, ZrV2O7 and Mg3(VO4)2. A layer system including at least one coating of the ceramic coating is also provided.
摘要:
A layer system including a substrate on which a first layer is positioned is provided. The first layer includes a thermographic material. The thermographic material is a pyrochlore phase doped with at least one rare earth material. The rare earth material is selected from the group europium, terbium, erbium, dysprosium, samarium, holmium, praseodymium, ytterbium, neodymium, and thulium. A method of a layer system is also provided.
摘要:
A layer system including a substrate and a layer is provided. The layer system has a hole at least in the layer, and wherein at least one recess is present in a surface of the layer in a vicinity around the hole or directly adjoining a boundary line of the hole.
摘要:
A thermal barrier coating including a two layered ceramic barrier coating, an inner ceramic layer and an outer ceramic layer, is provided. The thermal barrier coating has different thicknesses on different places of the component. In addition, the thickness of the inner ceramic layer and the thickness of the outer ceramic layer vary in relation to one another.
摘要:
A layer system including a substrate and a layer is provided. The layer system has a hole at least in the layer, and wherein at least one recess is present in a surface of the layer in a vicinity around the hole or directly adjoining a boundary line of the hole.
摘要:
The invention relates to a method for inspecting especially a gas turbine installation or steam turbine installation. According to said method, an actual condition of a component of the turbine installation is determined using a suitable system, the determined actual condition is compared with a predetermined desired condition of the component, and the result of comparison between the actual condition and the desired condition is used to determine whether an overall inspection of the turbine installation is required. The component is a guide vane whose angular position in relation to the direction of influx is the actual condition to be determined. The actual condition is determined by means of an imaging device. The invention also relates to a turbine inspection system for carrying out the method.
摘要:
Method for recording microstructural changes in a layer system component. A specific material parameter of the component is measured. The layer system may include an alloy substrate and an alloy or porous ceramic layer. The material parameter may be measured a plurality of times. The measured material parameter may include electrical capacitance, specific heat capacity, peltier coefficient or magnetic susceptibility. The material parameter may first be measured on a new component and subsequent measurements may be performed at a time interval after operational use. The recorded material parameter is then used to determine microstructural changes in the substrate or the layer material of the component caused by changes in precipitation, cracks, or depletion of an alloying element.
摘要:
Heat-insulating layer systems have to be provided with along service life of the heat-insulating layer in addition to having good heat-insulating properties. The inventive layer system comprises a ceramic layer which contains a mixture of two pyrochlore phases.