摘要:
A method of forming an internal channel within an article, such as a cooling channel in an air-cooled blade, vane, shroud, combustor or duct of a gas turbine engine. The method generally entails forming a substrate to have a groove recessed in its surface. A solid member is then placed in the groove, with the solid member being sized and configured to only partially fill the groove so that a void remains in the groove. The void is then filled with a particulate material so that the groove is completely filled. A layer is then deposited on the surface of the substrate and over the solid member and the particulate material in the groove, after which at least the solid member is removed from the groove to form the channel in the substrate beneath the layer.
摘要:
A method and system for making a gas permeable shell in a micro electromechanical systems (MEMS) device is disclosed. The MEMS device is created with an internal sacrificial layer. The device is then coated with a slurry composition which, after drying, is later exposed to a solvent. As a result, the sacrificial layer is removed to produce interconnected voids.
摘要:
A technique to prevent peeling of deposits formed on the surface of the inner walls of the thin-film formation apparatus and the members inside the apparatus and to suppress particle production without contamination of the inside of the apparatus. A member for a thin-film formation apparatus having inner walls and a method for manufacturing the member is provided. A plurality of unevenness is provided on at least a portion of the surface of the member and the inner walls on which unnecessary thin films are deposited. The surfaces are subjected to masking, and then, etching processing to form the plurality of unevenness. After the etching processing the masking is removed.
摘要:
A method for preparing a semiconductor member comprises: forming a substrate having a non-porous silicon monocrystalline layer and a porous silicon layer; bonding another substrate having a surface made of an insulating material to the surface of the monocrystalline layer; and etching to remove the porous silicon layer by immersing in an etching solution.
摘要:
Lateral pores in a thin metal film as well as fabricating branching and expanding ore arrays can be fabricated by a method of growing long pores laterally underneath a ask by use of stress compliant masks or varying the anodization voltage. Applications range from use with scanning electron microscope (SEM-compatible single molecule probe stations), to nanowire fixtures and to the use with a “pixelating, nonscanning” near field optical microscope (NOM). Pores are defined by conventional anodization vertically into the underlying membrane of preporous material through any overlying masking layers. The general solution is to utilize mechanically stable masks that withstand the stress during anodization and counteract the pore formation stress to lead to good pore ordering and directed growth. Multilayer masks are well suited for this. With a composition of materials having different elastic properties, tensile stress can be matched to counteract compressive stress caused by porous material growth. The boundary stress problem between preporous and porous material is solved by using a planarizing mask material that provides locally increased masking layer thickness at the critical boundary between nonporous and porous material in the film.
摘要:
A method for producing a porous diamond according to the present invention comprises steps of forming an anodized alumina layer, which functions as a mask, on a diamond substrate; and performing a plasma etching treatment to form pores on the diamond substrate, which pores have the same arrangement as those of the anodized alumina mask.
摘要:
A folded honeycomb, in particular a sandwich core layer, with walls (22) which are arranged in a rectangular or hexagonal configuration and which are perpendicular to the cover layers, for lightweight structures which are formed from a flat body of metal, plastic material, cloth, fiber composite material or paper by the production of cuts and by folding to constitute rectangular corrugations. The folded honeycomb has relatively large connecting surfaces (13, 16) for connection to the cover layers.