Abstract: A coating material (20) for coating a machine component (10), especially a gas turbine or a part thereof, comprises a mixture of at least a refractory material and an indicator material having an optical emission (e.g. fluorescence) spectrum which varies in response to a physical parameter of the coated component. In a preferred embodiment, the coating consists of yttrium aluminum garnet (YAG) or yttrium stabilized zirconium. The dopant is preferably a rare earth metal, e.g. Eu, Tb, Dy.

Abstract: An apparatus for and method of depositing material on a substrate, the method comprising the steps of: delivering from a first outlet a stream of droplets of a precursor liquid towards a substrate; applying an electric field between the first outlet and the substrate; and delivering from a second outlet a flow of fuel about the stream of droplets such as to provide an annular flame combustion region between the first outlet and the substrate through which at least a portion of the stream of droplets passes before reaching the substrate, whereby the precursor liquid is one or both of chemically reacted and decomposed to provide the deposited material.

Abstract: The present invention relates to film or coating deposition and powder formation.

Abstract: A coating material (20) for coating a machine component (10), especially a gas turbine or a part thereof, comprises a mixture of at least a refractory material and an indicator material having an optical emission (e.g. fluorescence) spectrum which varies in response to a physical parameter of the coated component. In a preferred embodiment, the coating consists of yttrium aluminium garnet (YAG) or yttrium stabilised zirconium. The dopant is preferably a rare earth metal, e.g. Eu, Tb, Dy.

Abstract: A fabrication method and apparatus, the method comprising the steps of: providing a liquid precursor over a surface of the substrate; and irradiating at least a region of the surface of the substrate with a light beam such as to fabricate a structure thereon from the liquid precursor.

Abstract: A coating material (20) for coating a machine component (10), especially a gas turbine or a part thereof, comprises a mixture of at least a refractory material and an indicator material having an optical emission (e.g. fluorescence) spectrum which varies in response to a physical parameter of the coated component. In a preferred embodiment, the coating consists of yttrium aluminium garnet (YAG) or yttrium stabilized zirconium. The dopant is preferably a rare earth metal, e.g. Eu, Tb, Dy.

Abstract: An apparatus for and method of depositing a polymeric film on a substrate (5), the apparatus comprising: a delivery unit (7, 8) for delivering an aerosol spray comprising aerosol droplets of a liquid precursor comprising a polymeric phase to the substrate, the polymeric phase comprising a polymeric material and at least one solvent; a heating unit (15) for at least heating an environment such as at least partially to evaporate the at least one solvent of the polymeric phase prior to the aerosol droplets depositing on the substrate; and an electrostatic field generation unit (9) for generating an electrostatic field between the delivery unit and the substrate, and electrostatically charging the aerosol droplets such that the aerosol droplets are electrostatically attracted to the substrate.

Abstract: A coating material (20) for coating a machine component (10), especially a gas turbine or a part thereof, comprises a mixture of at least a refractory material and an indicator material having an optical emission (e.g. fluorescence) spectrum which varies in response to a physical parameter of the coated component. In a preferred embodiment, the coating consists of yttrium aluminium garnet (YAG) or yttrium stabilised zirconium. The dopant is preferably a rare earth metal, e.g. Eu, Tb, Dy.

Abstract: A coating material (20) for coating a machine component (10), especially a gas turbine or a part thereof, comprises a mixture of at least a refractory material and an indicator material having an optical emission (e.g. fluorescence) spectrum which varies in response to a physical parameter of the coated component. In a preferred embodiment, the coating consists of yttrium aluminium garnet (YAG) or yttrium stabilised zirconium. The dopant is preferably a rare earth metal, e.g. Eu, Tb, Dy.

Abstract: In preferred aspects the present invention provides: (i) a method of and apparatus for depositing material, preferably a film, on a substrate, the method comprising the steps of: providing a substrate; heating the substrate; generating an aerosol comprising droplets of a material solution; providing a nozzle unit for delivering the aerosol to the substrate, the nozzle unit including at least one outlet through which a directed flow of the aerosol is delivered and at least one electrode; charging the aerosol droplets with a positive or negative charge; providing a flow of the aerosol through the nozzle unit so as to deliver a directed flow of the aerosol from the at least one outlet; and generating an electric field between the substrate and the at least one electrode such that the directed aerosol flow is attracted towards the substrate; and (ii) a method of and apparatus for fabricating a powder, preferably an ultrafine powder, the method comprising the steps of: providing a heated zone; generating an aeroso

Abstract: A method of depositing a material onto a substrate, comprising the steps of: feeding a material solution to an outlet to provide a stream of droplets of the material solution; applying a potential difference between the outlet and a substrate to electrostatically attract the droplets from the outlet towards the substrate such that a corona discharge is formed around the outlet; heating the substrate to provide an increase in temperature between the outlet and the substrate; and progressively increasing the temperature of the substrate during material deposition.

Abstract: Fabrication apparatus for fabricating an object as a plurality of successive laminae, the apparatus comprising: a nozzle comprising a precursor outlet for applying an aerosol or gaseous precursor onto a recipient surface; a heater for providing a temperature gradient along an application path of the precursor, so that the precursor is heated as it approaches the recipient surface and a transformation initiated so that a material layer of transformed material is deposited on the recipient surface; and a directable light beam for locally heating regions of the material layer so as to further transform the locally-heated regions to a solid material.

Abstract: The present invention relates to film or coating deposition and powder formation.

Abstract: The present invention provides: (i) a method of and apparatus for depositing material, preferably a film, on a substrate, the method comprising the steps of: providing a substrate; heating the substrate (5); generating an aerosol comprising droplets of a material solution; providing a nozzle unit (11) for delivering the aerosol to the substrate, the nozzle unit including at least one outlet (18) through which a directed flow of the aerosol is delivered and at least one electrode (21); charging the aerosol droplets with a positive or negative charge; providing a flow of the aerosol through the nozzle unit so as to deliver a directed flow of the aerosol from the at least one outlet; and generating an electric field between the substrate and the at least one electrode such that the directed aerosol flow attracted towards the substrate; and (ii) a method of and apparatus for fabricating a powder, preferably an ultrafine powder, the method comprising the above steps but where the aerosol droplets react homogeneous

Abstract: A method of material deposition of a desired material onto a substrate comprises the steps of: (i) depositing a surface-covering layer onto the substrate; (ii) depositing the desired material onto the surface-covering layer; and (iii) heating the substrate to a surface-covering removal temperature to remove at least some of the surface-covering layer. Steps (ii) and (iii) may be carried out together, so that the deposition of step (ii) may be carried out at least in part at the surface-covering-removal temperature.

Abstract: A method of depositing a material onto a substrate, comprising the steps of: feeding a material solution to an outlet to provide a stream of droplets of the material solution; applying a potential difference between the outlet and a substrate to electrostatically attract the droplets from the outlet towards the substrate such that a corona discharge is formed around the outlet; heating the substrate to provide an increase in temperature between the outlet and the substrate; and progressively increasing the temperature of the substrate during material deposition.

Abstract: Methods for depositing a material onto a substrate include the steps of: feeding a material solution including one or more precursor compounds, a solvent and a pH-modifying catalyst to an outlet to provide a stream of droplets of the material solution; generating an electric field to electrostatically attract the droplets from the outlet towards the substrate; and providing an increase in temperature between the outlet and the substrate.

Abstract: A method of depositing a material onto a substrate, comprising the steps of: feeding a material solution to an outlet to provide a stream of droplets of the material solution; applying a potential difference between the outlet and a substrate to electrostatically attract the droplets from the outlet towards the substrate such that a corona discharge is formed around the outlet; heating the substrate to provide an increase in temperature between the outlet and the substrate; and progressively increasing the temperature of the substrate during material deposition.

Abstract: A fabrication method in which an object is formed as a plurality of successive laminae, the method comprising the repeated steps of: (i) applying a precursor onto a recipient surface; and (ii) locally heating regions of the deposited precursor by directing a light beam onto those regions of the deposited precursor, so that the locally heated regions transform to a solid material.