摘要:
In a method for the deposition of a film of mixed oxide on a composite material substrate, a step of evaporation-deposition of the mixed oxide, carried out with the aid of an electron beam sent to a target of mixed oxide having the same stoichiometric composition as the film to deposit, is carried out at an increasing deposition rate, measured on the substrate; in particular, the evaporation-deposition step comprises at least one first step of growth carried out at a deposition rate lower than or equal to a predetermined threshold, and at least one second step of growth carried out at a deposition rate higher than the threshold.
摘要:
The invention relates to a method for the formation of a protective film comprising a spinel of formula Mn x Co y O 4-δ , where x+y=3, on a metallic substrate, characterised in that it comprises the steps of: a) depositing on the substrate manganese and cobalt as metal species in a molar ratio x/y corresponding to the above-mentioned formula by thermal co-evaporation; and b) oxidising in situ the metal species to form the spinel. The method is applied in particular for the coating of metal interconnections for solid oxide fuel cells (SOFC).
摘要翻译:本发明涉及在金属基底上形成包含式Mn x Co y O 4-'尖晶石的保护膜的方法,其中x + y = 3,其特征在于它包括以下步骤:a) 通过热共蒸发,以与上述式相对应的摩尔比x / y作为金属物质沉积在基底上的锰和钴; 和b)原位氧化金属物质以形成尖晶石。 该方法特别用于固体氧化物燃料电池(SOFC)的金属互连涂层。
摘要:
There are provided herein a method and an apparatus for deposition of films of coating materials on a substrate, of particular use in obtaining superconductive composite tapes for deposition of films of superconductive oxides and/or buffer layers. A step of deposition of the film (2) on the substrate (4) is associated to a step of gas treatment in situ, in which a flow (13) of gas is sent towards a working surface (14) of the substrate or of the film growing on the substrate. The gas-treatment step is performed via ultrasoundexpansion nozzles (26).
摘要:
In a method for the deposition of a film of mixed oxide on a composite material substrate, a step of evaporation-deposition of the mixed oxide, carried out with the aid of an electron beam sent to a target of mixed oxide having the same stoichiometric composition as the film to deposit, is carried out at an increasing deposition rate, measured on the substrate; in particular, the evaporation-deposition step comprises at least one first step of growth carried out at a deposition rate lower than or equal to a predetermined threshold, and at least one second step of growth carried out at a deposition rate higher than the threshold.
摘要:
A process is described for the preparation of magnesium borohydride having a high purity and crystallinity, which comprises the reaction of an organometallic compound of magnesium of the type MgX 2 , wherein X is an organic binder selected from alkyl, amide, alkoxide, cyclopentadienyl, aryl, with a derivative of a boron hydride, in a hydrocarbon solvent.
摘要:
There is provided a method for making biaxially textured layers on non-textured substrates, in particular for making intermediate buffer layers in superconductive composite tapes. A non-textured substrate is provided with a surface having a roughness of less than approximately 10 nm and preferably less than approximately 5 nm. This is followed by a deposition step, in which a deposition material is deposited on said surface with direct evaporation without any concern for orientation; the deposition material grows in a natural texture on the surface to form an oriented layer with biaxial texture.
摘要:
A method is described for the preparation of superconductor massive bodies of MgB2, having a density close to the theorical value, which comprises the following passages: mechanical activation of crystalline boron with the formation of activated powders; formation of a porous preform of said powders; assembly of the porous boron preform and massive precursors of metallic magnesium in a container and sealing thereof in an atmosphere of inert gas or with a low oxygen content; thermal treatment of the boron and magnesium as assembled above, at a temperature higher than 700 °C for a time greater than 30 minutes, with the consequent percolation of the magnesium, in liquid phase, through the activated crystalline boron powders.