Abstract:
A layer system is provided. The layer system includes a substrate and a two layered ceramic layer with an inner ceramic layer and an outer ceramic layer. The ductility of the ceramic layer is improved by an inner ceramic layer with a nano structure. The layer system also may include a metallic bond coat.
Abstract:
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.
Abstract:
The invention relates to a compound with the nominal chemical composition AlwCoxMy wherein M represents at least one of the elements selected from the group Ni, Cr, and at least 30 mass percent of the compound is a quasicrystalline structure or similar. The invention is characterized in that 70≦w≦76 and w+X+Y=100.
Abstract translation:本发明涉及具有标称化学组成AlwCoxMy的化合物,其中M表示选自Ni,Cr中的至少一种元素,并且至少30质量%的化合物是准晶体结构或类似物。 本发明的特征在于,70< N& E; 76和w + X + Y = 100。
Abstract:
Layered thermal barrier coating with high porosity. Ceramic thermal barrier coatings according to the state of the art often do not withstand the thermal and mechanical stresses. The inventive ceramic thermal barrier coating comprises two ceramic thermal barrier layers with a different porosity, in which even the inner ceramic thermal barrier layer has a high porosity
Abstract:
Protective layers, according to the prior art, achieve their protective function b depletion of a defined element that forms a protective oxide layer or that is exhausted as a sacrificial material. Once said material is exhausted, the protective function cannot be maintained. The invention is characterized by using particles (1) that contain a sustained-release depot of the exhaustible material. For this purpose, the material is present in a superstoichiometric form.
Abstract:
Ceramic layers are often used for heat insulation in a layer system, and have a high porosity therefore, The inventive porous ceramic heat insulating layer has a particular pore size distribution such that it has a high expansion tolerance event at temperatures higher than 1200° C.
Abstract:
An oxidation resistant component is disclosed comprising a substrate and a protective layer. The protective layer consists of an inner MCrAlY layer contiguous with the substrate and an outer layer consisting of at least Ni and Al and having a β-NiAl structure.
Abstract:
MCrAl layers according to prior art often display chipping of the thermally grown aluminum oxide layer (TGO) as a result of thermally induced stresses, which significantly reduces the oxidation behavior or the bonding behavior of ceramic heat insulating layers. An inventive MCrAl layer is designed in such a way that the TGO created thereon is microporous and thus allows expansion. The microporosity of the TGO is ensured by adding elements into the MCrAl layer in a targeted manner.
Abstract:
Protective layers of the MCrAlX type according to the prior art are often provided with a platinum layer to prevent diffusion of elements out of the base material into the MCrAlX. The MCrAlX alloy according to the invention includes halogens (F, Cl, Br, I), which prevent this diffusion, in particular of titanium.
Abstract:
The invention relates to a method for removing at least one layer area of a component made of metal or a metal compound. When components are used in high temperature areas, they acquire degraded areas which are removed by means of an acid attack. Removal during said acid treatment is uneven since areas having different acidic solubility behavior arise as a result of said degradation. According to the inventive method, the chemical composition and the phase composition of the component can be altered in such a matter that an even removal can take place during the acid treatment.