Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-temperature oxidation-resistant thermal-insulation composite ceramic coating
The invention discloses a high-temperature oxidation-resistant thermal-insulation composite ceramic coating which is composed of one or two of silicon carbide coating, silicon nitride coating, mullite coating, alumina coating, zirconium silicate coating and Sailong coating. The invention is characterized in that the ceramic coating is composed of an inner layer and an outer layer, wherein the inner layer has a porous structure, and the outer layer is compact and free of pores and permeates into the inside of the inner layer; and the pores are communicated mutually, the size of the pores is 1-20 mu m, and the pores account for 30-60 vol% of the inner layer. The depth of the outer layer permeating into the inside of the inner layer is 1-5 mu m. The coating has the advantages of excellent high temperature resistance, excellent oxidation resistance, excellent heat insulation property and the like. The inner layer has high porosity and loose structure, and thus, has low thermal stress at high temperature and low tendency to cracking and shedding. The outer layer permeates into the interior of the inner layer to form the mechanical bonding action, so that the inner layer and outer layer are combined closely.
High-temperature oxidation-resistant thermal-insulation composite ceramic coating
The invention discloses a high-temperature oxidation-resistant thermal-insulation composite ceramic coating which is composed of one or two of silicon carbide coating, silicon nitride coating, mullite coating, alumina coating, zirconium silicate coating and Sailong coating. The invention is characterized in that the ceramic coating is composed of an inner layer and an outer layer, wherein the inner layer has a porous structure, and the outer layer is compact and free of pores and permeates into the inside of the inner layer; and the pores are communicated mutually, the size of the pores is 1-20 mu m, and the pores account for 30-60 vol% of the inner layer. The depth of the outer layer permeating into the inside of the inner layer is 1-5 mu m. The coating has the advantages of excellent high temperature resistance, excellent oxidation resistance, excellent heat insulation property and the like. The inner layer has high porosity and loose structure, and thus, has low thermal stress at high temperature and low tendency to cracking and shedding. The outer layer permeates into the interior of the inner layer to form the mechanical bonding action, so that the inner layer and outer layer are combined closely.
High-temperature oxidation-resistant thermal-insulation composite ceramic coating
CHEN ZHAOFENG (Autor:in) / WANG YANG (Autor:in)
30.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
Preparation method of high-temperature-resistant ceramic anti-corrosion heat-insulation coating
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