摘要:
The invention relates to a method, including: depositing, onto the entire surface of a substrate, a refractory-cement paste mainly consisting of silica and alumina and mixed with a liquid, the cement paste filling in the hollow portions of the raised pattern of the surface; performing a heat treatment in order to harden the cement after the latter has set and obtain a first layer (22) of refractory-cement coating; depositing, onto the first layer, a slurry consisting of a glass frit suspended in a liquid and mainly consisting of a powder consisting of silica, boron oxide, alumina and at least one alkaline metal oxide; and performing a heat treatment for coating by softening and spreading the glass in order to obtain a second coating layer (24) forming a glaze covering the first layer, the composition of the glass frit being selected so as to form glass having a coating temperature of less than 1100°C and a glass-transition temperature of less than 750°C.
摘要:
A composite article includes a substrate, at least one protective layer on the substrate, and an intermediate layer between the protective layer and the substrate. The intermediate layer includes a first material that occupies a first continuous region and a second material that occupies a second continuous region next to the first continuous region. The first continuous region and the second continuous region are each in contact with the substrate and the protective layer.
摘要:
A coated component is provided comprising a silicon-based substrate and a porous thermal barrier coating. The porous thermal barrier coating comprises a ceramic material selected from th group consisting of zircon, yttria-stabilized zirconia and yttria-stabilized hafnia, and a metal silicate, a metal disilicate or combinations thereof.
摘要:
A system may include a blade track or blade shroud and a gas turbine blade that includes a blade tip. The blade track or blade shroud may include a substrate and an abradable layer formed over the substrate. The abradable layer may include at least one of zirconia or hafnia; ytterbia; samaria; and at least one of lutetia, scandia, ceria, gadolinia, neodymia, or europia. The abradable layer may include a porosity between about 25 vol. % and about 50 vol. %. The blade track or blade shroud and the gas turbine blade may be configured so the blade tip contacts a portion of the abradable layer during rotation of the gas turbine blade, and the abradable layer may be configured to be abraded by the contact by the blade tip.
摘要:
A method for the treatment of ceramic surfaces comprising in succession : - a deposition step, in which applied on a ceramic surface is a coating including a metal oxide comprised in the group made up of alumina, silicon dioxide, zirconium dioxide, titanium dioxide, mullite, zinc oxide, yttrium oxide and mixtures thereof; - a first consolidation step, in which the coating is subjected to a temperature of between 150°C and 900°C; - a functionalization step, in which the coating is treated with boiling water and/or with steam for the production of hydroxyl groups; - a second consolidation step, in which the coating is subjected to a temperature of between 150°C and 900°C; - a fluorination step, in which the coating is treated with a fluorinated compound; and - a third consolidation step, in which the coating is subjected to a temperature of between 100°C and 300°C.
摘要:
The invention relates to a method for producing a domestic appliance plate (10) from a starting mixture. In order to provide a domestic appliance plate (10) having a high resistance to thermal shock, good thermal insulation, and advantageous mechanical properties, at least magnesium silicate hydrate, kaolinite, calcined kaolinite, and aluminum oxide are used for the starting mixture.