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Coating resistant to high temperature, high humidity and oxygen corrosion and preparation method thereof
The invention discloses a coating resistant to high temperature, high humidity and oxygen corrosion and a preparation method thereof. The coating resistant to high temperature, high humidity and oxygen corrosion is arranged on the surface of a ceramic matrix composite substrate, and comprises a bonding layer and an RE2X2O7 surface layer, wherein the bonding layer is one of Si, SiO2 and SiC, the RE2X2O7 surface layer is of a pyrochlore type crystal structure, wherein RE is La or Sm, and X is Zr or Hf. The preparation method comprises the following steps: (1) preparing a bonding layer suspension; (2) preparing an RE2X2O7 suspension; (3) preparing a bonding layer preformed layer; (4) preparing an RE2X2O7 surface layer preformed layer; and (5) preparing the coating resistant to high temperature, high humidity and oxygen corrosion. The coating resistant to high temperature, high humidity and oxygen corrosion disclosed by the invention is good in thermal matching performance with the substrate, and capable of stably working for a long time in a strong-oxidizing/corrosive fuel gas erosion environment; the preparation method has the advantages of being simple in equipment, fast to form and the like; the prepared coating is high in bonding strength with the substrate.
Coating resistant to high temperature, high humidity and oxygen corrosion and preparation method thereof
The invention discloses a coating resistant to high temperature, high humidity and oxygen corrosion and a preparation method thereof. The coating resistant to high temperature, high humidity and oxygen corrosion is arranged on the surface of a ceramic matrix composite substrate, and comprises a bonding layer and an RE2X2O7 surface layer, wherein the bonding layer is one of Si, SiO2 and SiC, the RE2X2O7 surface layer is of a pyrochlore type crystal structure, wherein RE is La or Sm, and X is Zr or Hf. The preparation method comprises the following steps: (1) preparing a bonding layer suspension; (2) preparing an RE2X2O7 suspension; (3) preparing a bonding layer preformed layer; (4) preparing an RE2X2O7 surface layer preformed layer; and (5) preparing the coating resistant to high temperature, high humidity and oxygen corrosion. The coating resistant to high temperature, high humidity and oxygen corrosion disclosed by the invention is good in thermal matching performance with the substrate, and capable of stably working for a long time in a strong-oxidizing/corrosive fuel gas erosion environment; the preparation method has the advantages of being simple in equipment, fast to form and the like; the prepared coating is high in bonding strength with the substrate.
Coating resistant to high temperature, high humidity and oxygen corrosion and preparation method thereof
LI WEI (author) / ZHANG JIAN (author) / WANG SONG (author) / WANG SHENGXUE (author) / ZHANG BIFENG (author) / JIANG JINMING (author)
2015-07-01
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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