Abstract:
The sealing composition contains powders comprised of, by mass, 70 to 90 % aluminium, 5 to 25 % silicon, 0 to 5 % silica and 0.1 to 5 % moderator metal, said powders being dispersed in a carrier comprising an organic binder disolved in a solvent and a mineral binder. The composition is applied to the faces to be assembled of ceramic part and a part made of refractory alloy or super-alloy, and the assembly is heated in order to eliminate said carrier and to form between the two parts a layer of syncrystallized mullite with the ceramic.
Abstract:
A method of joining components (1, 2) comprising positioning a first component (1) into a bore defined at least partially by a second component (2) containing an intermediate plasticisable material (3). Relative motion is caused between the two components while they are urged together so as to at least partially plasticise the intermediate material. The plasticised material flows within the gap formed between the two components. The relative motion is stopped and the plasticised material allowed to solidify whereby the two components are joined together via the solidified material.
Abstract:
A process for bonding a superconductor by mechanical deposition of a metal on the surface of the superconductor is disclosed. To ensure rapid, simple, defect-free bonding even under normal atmospheric conditions, particles are removed from the surface of the superconductor and immediately metal particles of a good conductor of electricity such as silver, gold or copper are coated or deposited on the surface of the superconductor. The metal particles are deposited onto the surface of the superconductor (3) by a rotating steel brush (10) which rubs against a metal block made of a good conductor of electricity. The surface is first thoroughly cleaned mechanically. The metal particles are then transferred from the metal block (12) to the surface of the superconductor (3).
Abstract:
A method for bonding a body of a carbide or nitride ceramic selected from the carbides and nitrides of Groups III and IV of the second and third periods of the Periodic Classification of the Elements, to a body of a metal selected from the Transition Series and having an atomic number of from 21 to 29 inclusive, 31 to 47 inclusive or 57 to 79 inclusive, characterised in that selected surfaces of the bodies are disposed in intimate abutting relationship and at least the abutting surfaces are heated to a temperature below the melting point of the lowest melting component of the system but sufficient to bring about the formation of a bond between the surfaces. The examples include bonding of carbide or nitride ceramic (2) to metal (1) in CO/CO2 or NH3, N, H, Ar atmosphere using an induction heated alumina tube furnace under pressure exerted by alumina rod (9).
Abstract translation:将从元素周期分类的第二和第三周期的III和IV族的碳化物和氮化物中选出的碳化物或氮化物陶瓷的本体结合到选自过渡系列的金属体中,并且具有 原子序数为21〜29,包括31〜47,或57〜79,其特征在于,主体的选定表面以紧密的邻接关系设置,并且至少将抵接面加热至低于 系统的最低熔点成分,但足以导致表面之间形成结合。 实例包括在氧化铝棒(9)施加的压力下,使用感应加热氧化铝管式炉,在CO / CO 2或NH 3,N,H,Ar气氛中将碳化物或氮化物陶瓷(2)与金属(1)结合。
Abstract:
By coating green plies (7', 7'', … ) of a green CMC component (4) with Aluminum (Al) before sintering the plies (7', 7'', … ) together, a good interlayer stability is reached for the CMC component (40).
Abstract:
The subject matter of the present invention is an integrally bonded composite component, a method for producing same and the use thereof. The invention relates, in particular, to integrally bonded transparent ceramic composite components, to a method for manufacturing such ceramic composite components, and to the use thereof.
Abstract:
Procédé dʼassemblage dʼau moins deux pièces dont les faces à assembler sont en carbure de silicium par brasage réfractaire comportant les étapes successives suivantes : - mettre en contact les faces à assembler en carbure de silicium avec une composition de brasure, ladite composition de brasure étant un alliage binaire Si-Y comprenant de 24% massique à 40% massique de silicium et de 76% massique à 60% massique dʼyttrium, - faire fondre la composition de brasure en la chauffant à une température de brasage supérieure à la température de fusion de lʼalliage binaire Si-Y pour former un joint de brasage réfractaire.
Abstract:
A gas turbine engine airfoil assembly includes an airfoil and an attachment structure respectively bonded to opposing sides of a platform. At least one of the airfoil, the platform and the attachment structure are constructed from a ceramic matrix composite.