摘要:
PROBLEM TO BE SOLVED: To provide a thermal protection system that is capable of handling high temperatures and severe environments required for the future gas turbine. SOLUTION: A first ceramic layer (3) is attached via a bond coat layer (4) on a metallic substrate (5), wherein on the first ceramic layer (3) there is provided at least one second ceramic layer (1) attached to the first ceramic layer (3) via a ceramic adhesive layer (2), wherein the first ceramic layer (3) is a low-temperature ceramic layer and the second ceramic layer (1) is a high temperature ceramic layer. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
The heat insulation layer (7) is used in one component, e.g. a valve housing (34) of a steam turbine, which is next to a second component, e.g. a housing cover (37), to adjust, esp. even out, differing deformation behavior of the components, esp. between room and operational temperatures, to reduce radial and/or axial tolerances. The first component is subject to e heat differential of at least 200 deg. C. - The heat insulation layer is used for a steam inlet section of a turbine, which is next to a blade section, a turbine housing, a valve housing unit (31), a turbine blade, or for a component consisting of a main material, e.g. iron/nickel/cobalt alloy. The heat insulation layer consists at least partially, pref. completely, of zirconium oxide (Zr02), or titanium oxide (Ti02). An intermediate protection layer below the heat insulation is a MCrAlX layer, with M being an element from the group nickel, cobalt, and esp. iron, and X being yttrium and/or silicon and/or at least one of the rare earth.
摘要:
PROBLEM TO BE SOLVED: To provide a thermal insulating ceramic layer for use on metal alloy components exposed to hostile thermal and chemical environment such as a gas turbine. SOLUTION: The thermal barrier coating includes cracks made by a series of steps, including a step of applying a shockwave onto at least a portion of the thermal barrier coating so as to form microcracks in the thermal barrier coating without substantially deforming a substrate. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a coating composition that is free of hexavalent chromium that can be applied to prevent corrosion of turbine engine components even where the turbine engine components are subjected to elevated operating temperatures in a wide variety of atmospheres. SOLUTION: A corrosion resistant tape coating for gas turbine engine includes a glassy ceramic matrix wherein the glassy matrix is silica-based, and includes corrosion resistant particles selected from refractory particles and non-refractory MCrAlX particles, and combinations thereof. The corrosion resistant particles 65 are substantially uniformly distributed within the matrix, and provide the coating with corrosion resistance. Importantly the coating 64 of the present invention has a coefficient of thermal expansion (CTE) greater than that of alumina at engine operating temperatures. The CTE of the coating 64 is sufficiently close to that of the substrate 60 such that the coating 64 does not spall after frequent engine cycling at temperatures above 1200 DEG F. COPYRIGHT: (C)2008,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a method for minimizing or eliminating hot spots from a combustor panel. SOLUTION: The method is used for selectively applying thermal barrier coatings that exhibit different degrees of thermal conductivity to different inner surface areas of an engine combustor panel. Different types of thermal barrier coatings are applied to prescribed inner surface areas of the combustor panel based on empirical observation or prediction. Thermal barrier coatings exhibiting low thermal conductivity are applied to combustor panel areas that are exposed to hot temperature, and thermal barrier coatings exhibiting high thermal conductivity are applied to areas that are exposed to low temperature. COPYRIGHT: (C)2008,JPO&INPIT