Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for prolonging service life of BN nozzle
The invention discloses a method for prolonging the service life of a BN nozzle. The method comprises the following steps: depositing a Si coating in the BN nozzle, and then performing high-temperature treatment in a nitrogen atmosphere to finally form a layer of compact Si3N4 coating with a certain thickness in the nozzle. The Mohs hardness of Si3N4 is 9-9.5, the thermal expansion coefficient is 2.75*10<-6>/DEG C and is comparatively matched with that of a BN matrix, and Si3N4 has excellent high temperature mechanical properties, erosion resistance, wear resistance, corrosion resistance and oxidation resistance, and can protect the BN nozzle from being oxidized, thereby ensuring that the service life of the nozzle is greatly prolonged.
Method for prolonging service life of BN nozzle
The invention discloses a method for prolonging the service life of a BN nozzle. The method comprises the following steps: depositing a Si coating in the BN nozzle, and then performing high-temperature treatment in a nitrogen atmosphere to finally form a layer of compact Si3N4 coating with a certain thickness in the nozzle. The Mohs hardness of Si3N4 is 9-9.5, the thermal expansion coefficient is 2.75*10<-6>/DEG C and is comparatively matched with that of a BN matrix, and Si3N4 has excellent high temperature mechanical properties, erosion resistance, wear resistance, corrosion resistance and oxidation resistance, and can protect the BN nozzle from being oxidized, thereby ensuring that the service life of the nozzle is greatly prolonged.
Method for prolonging service life of BN nozzle
LI BEI (Autor:in) / GUO FENGPING (Autor:in)
06.05.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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