摘要:
For testing structural ceramic parts under overload conditions, a previously calculated temperature distribution is generated on the part by thermal radiation, this temperature distribution inducing the desired test stress or overload. The temperature distribution is measured with topically and temporally resolving temperature sensors, is compared to a desired or calculated temperature distribution, and is regulated by varying the duration and/or location of the radiation influence until the desired temperature distribution has been produced.
摘要:
An article that is particularly well suited for use as a gas turbine engine component has a metallic substrate and a ceramic thermal barrier layer including a mixed metal oxide system comprising a compound selected from the group consisting of (i) a lanthanum aluminate and (ii) a calcium zirconate, the calcium in which is partially replaced by at least one calcium-substitute element, such as strontium (Sr) or barium (Ba). In addition, the lanthanum in the lanthanum aluminate can be partially replaced by a lanthanum-substitute element from the lanthanide group, particularly gadolinium (Gd). A process for producing such an article comprises providing a pre-reacted mixed metal oxide system as described above and applying it to the substrate by plasma spraying or an evaporation coating process.
摘要:
The invention relates to a product (1), particularly a gas turbine blade that can be exposed to a hot aggressive gas (7). The product (1) has a metallic basic body (2), which is provided with a thermal barrier coating (4) having a spinel of the composition AB2O4.
摘要:
An article that is particularly well suited for use as a gas turbine engine component has a metallic substrate and a ceramic thermal barrier layer including a mixed metal oxide system comprising a compound selected from the group consisting of (i) a lanthanum aluminate and (ii) a calcium zirconate, the calcium in which is partially replaced by at least one calcium-substitute element, such as strontium (Sr) or barium (Ba). In addition, the lanthanum in the lanthanum aluminate can be partially replaced by a lanthanum-substitute element from the lanthanide group, particularly gadolinium (Gd). A process for producing such an article comprises providing a pre-reacted mixed metal oxide system as described above and applying it to the substrate by plasma spraying or an evaporation coating process.
摘要:
A turbocharger configuration, particularly in or for a motor vehicle, includes at least one turbocharger stage, which has a turbine and a compressor that are mechanically decoupled from each other. A turbochargeable internal combustion engine having such a turbocharger configuration, is also provided.
摘要:
There is described an arrangement comprising at least one luminescent heat insulating layer which is disposed on a carrier body, for preventing heat transfer between the carrier body and the surrounding area of the carrier body. The heat insulating layer comprises at least one luminous substance which can be excited, with the aid of an excitation light having a determined excitation wave length for emitting a luminescent light having a determined luminescent wave length. At least one additional heat insulating layer, which is essentially free from the luminous substance, is provided. The additional heat insulating layer is essentially opaque to the excitation light in order to excite the emission of luminous light and/or for the luminous light of the luminescent substance. The luminous substance is, preferably, a mixed oxide which is selected from the group perowskit, having the total formula AA 03 and/or pyrochlore, having the total formula A2B207, wherein A and A′ are, respectively, a trivalent metal and B a tetravalent metal. The heat-insulating layers can be used, preferably in a gas turbine, and the state of the heat insulating layer can be examined in a simple manner.
摘要翻译:描述了一种布置,其包括至少一个发光绝热层,其布置在载体主体上,用于防止载体与承载体周围区域之间的热传递。 所述隔热层包括至少一种能够被激发的发光物质,借助于具有确定的激发波长的激发光来发射具有确定的发光波长的发光。 提供至少一个基本上不含有发光物质的隔热层。 附加的绝热层对激发光基本上是不透明的,以便激发发光和/或发光物质的发光。 发光物质优选为选自具有总计式A2B207的总计式AA03和/或烧绿石的群组中的混合氧化物,其中A和A'分别为三价金属和B a 四价金属。 优选在燃气轮机中使用隔热层,并且能够以简单的方式检查隔热层的状态。
摘要:
A piezo actuator (1) is disclosed that has a contact lug (20, 21) for the electrical contacting of an electrode (14, 15) of an actuator member (11). Due to an expansion and contraction of the actuator member, a mechanical stress occurs in the contact lug that is minimized in that the contact lug has a device for adapting the expanse to a dimension of the expansion and contraction. The device is, for example, a deformation material in the form of a wire weave. The piezo actuator is utilized for the drive of an injection valve in an internal combustion engine.
摘要:
A heat-insulation material for a heat-insulation layer (3) for a carrier body (2) for preventing heat transfer between the carrier body and a surrounding area (7) therearound includes at least one luminous substance which is excitable for emitting luminescent light having a defined emission wavelength and includes at least one type of metal oxide containing at least one trivalent metal (A). Also described is an arrangement of at least one heat-insulation layer which contains the heat-insulation material and is applied to the carrier body. The described heat-insulation material is characterised in that the metal oxide is embodied in the form of a mixed oxide selected in a perovskite group of total formula AA′O3, and/or of pyrochlore of total formula A2B2O7, wherein A′ is the trivalent metal and B is a tetravalent metal. The heat-insulation layer containing the heat-insulation material is preferably used for a gas turbine.
摘要翻译:一种用于防止载体与周围区域(7)之间的热传递的用于载体主体(2)的绝热层(3)的绝热材料包括至少一种可发光的发光物质 具有限定的发射波长并且包括至少一种含有至少一种三价金属(A)的金属氧化物。 还描述了至少一个包含绝热材料并被施加到载体主体的绝热层的布置。 所述绝热材料的特征在于金属氧化物以选自总体式AA'O 3 N的钙钛矿组中的混合氧化物的形式和/或总式 A 2是3价金属,B是四价金属。 含有绝热材料的绝热层优选用于燃气轮机。
摘要:
A method and device for layer thickness determination allows for the layer thickness to be determined in situ during the coating process. This is achieved using a sensor which has an electrical property which, as a result of the coating process, changes in a manner which is representative of the layer thickness which has been reached. As such, this property can be measured.
摘要:
A composite ultrasound transducer (array) contains piezoelectric ceramic transducer elements which radiate substantially in the longitudinal direction, and are embedded in a polymer matrix. The transducer elements have such a geometrical structure, and are arranged relative to each other, so that the development of oscillation modes perpendicular to the longitudinal direction of the transducer elements is suppressed. A method for manufacturing the composite ultrasound transducer includes the steps of filling a plastic form, having a "negative" of the desired shape of the transducer elements, with ceramic slurry, and pyrolyzing the plastic form after the slurry dries therein. The resulting voids between the hardened ceramic elements are filled with polymer to create the overall composite transducer. The transducer elements can thus be given an arbitrary shape and arrangement, such as hexagonal or irregular square structures, having a trapezoidal cross-section in planes parallel to the longitudinal axis of the transducer elements.