摘要:
Die vorliegende Erfindung betrifft ein Bauteil einer Stömungsmaschine aus einem Verbundwerkstoff (5) mit einer Keramikmatrix und einer auf dem Verbundwerkstoff angeordneten Korrosionsschutzschicht (4), wobei die Korrosionsschutzschicht 50 - 80 Gew.% Silicium, 12 - 30 Gew.% Stickstoff, 2 - 8 Gew.% Sauerstoff, 2 - 8 Gew.% Aluminium und 0 - 3 Gew.% mindestens eines Erdalkalimetalls umfasst. Außerdem betrifft die Erfindung ein Verfahren zur Herstellung eines entsprechenden Bauteils einer Strömungsmaschine.
摘要:
A sialon ceramic material comprising a ceramic core selected from alpha-prime-sialon, beta-prime-sialon, and an intergranular phase and, optionally, substantially inert refractory phases. The sialon ceramic material has an alloyed surface layer with a substantially increased aluminum and oxygen content.
摘要:
A coating used in a vapor-oxidative atmosphere has a first layer including SIALON and a second layer covering the first layer and being exposed to the atmosphere, the second layer including mullite, wherein the first layer and the second layer get in contact with each other.
摘要:
A method is provided for preparing ceramic precursors from hydridosiloxane starting materials and then pyrolyzing these precursors to give rise to silicious ceramic materials. Si-H bonds present in the hydridosiloxane starting materials are catalytically activated, and the activated hydrogen atoms may then be replaced with nonhydrogen substituents. These preceramic materials are pyrolyzed in a selected atmosphere to give the desired ceramic product. Ceramic products which may be prepared by this technique include silica, silicon oxynitride, silicon carbide, metal silicates, and mullite.
摘要:
A profiled body of silicon nitride and aluminium nitride dipped in a silica solution such that the silica infiltrates the pores of the body. This silica, together with unconverted silica present in the body, reacts with the aluminium nitride when the body is subsequently fired at around 1800°C in a controlled atmosphere to form sialon. As all the silica is utilised in the reaction, a sialon is formed which can retain its strength up to around 100,000 p.s.i. and at temperatures above 1000 * C. Alternatively, the body is infiltrated with alumina to form sialon when fired to at least 1800°C in a controlled atmosphere.
摘要:
A sialon ceramic material comprising a ceramic core selected from alpha-prime-sialon, beta-prime-sialon, and an intergranular phase and, optionally, substantially inert refractory phases. The sialon ceramic material has an alloyed surface layer with a substantially increased aluminum and oxygen content.
摘要:
A sialon ceramic material comprising a ceramic core selected from alpha-prime-sialon, beta-prime-sialon, and an intergranular phase and, optionally, substantially inert refractory phases. The sialon ceramic material has an alloyed surface layer with a substantially increased aluminum and oxygen content.