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Ceramic-based abradable sealing material, coating, composite coating and preparation method
The invention discloses a ceramic-based abradable sealing material, a coating, a composite coating and a preparation method. The ceramic-based abradable sealing material is composed of 172-186 parts by mass of 8YSZ/RE3NbO7 powder, 6-10 parts by mass of Ni powder, 4-10 parts by mass of h-BN powder and 4-8 parts by mass of PHB, wherein the RE element is Dy, Sm or La; the 8YSZ/RE3NbO7 powder is obtained by ball-milling and calcining Y2O3 powder, ZrO2 powder and RE3NbO7 powder, wherein the mass ratio of the Y2O3 powder to the ZrO2 powder to the RE3NbO7 powder is 2:25:1. Accoridng to the invention,8YSZ/RE3NbO7 powder is prepared through a ball milling method and a solid-phase sintering method, then soft-phase h-BN, a pore forming agent PHB and bonding-phase Ni powder are doped into the 8YSZ/RE3NbO7 powder; the bonding strength of a base body is improved through the Ni powder, and the ceramic-based abradable sealing material which is moderate in hardness, good in bonding strength with the base body and excellent in thermal shock resistance is obtained. Besides, the material is subjected to plasma spraying, so that the ceramic-based abradable sealing coating with excellent anti-seismic property is obtained, the ceramic-based abradable sealing coating can be suitable for the friction surface of a stationary blade, and the gas path sealing performance of an aerospace engine and a gas turbine is improved.
本发明公开了一种陶瓷基可磨耗封严材料、涂层、复合涂层及制备方法，由172～186质量份的8YSZ/RE3NbO7粉末、6～10质量份的Ni粉、4～10质量份的h‑BN粉末和4～8质量份的PHB组成；RE元素为Dy元素、Sm元素或La元素；其中，8YSZ/RE3NbO7粉末由Y2O3粉末、ZrO2粉末及RE3NbO7粉末球磨和煅烧后得到，且Y2O3粉末、ZrO2粉末及RE3NbO7粉末的质量比为2：25：1；本发明通过球磨法和固相烧结法制备8YSZ/RE3NbO7粉末，再向其内掺杂软相h‑BN、造孔剂PHB及粘接相Ni粉，通过Ni粉提高基体结合强度，得到硬度适中、与基体结合强度良好及抗热震性能优的陶瓷基可磨耗封严材料，在将该材料进行等离子喷涂，进而得出抗震性能优良好的陶瓷基可磨耗封严涂层，可适用于静叶的摩擦表面，提升航空航天发动机和燃气轮机的气路封闭性。
Ceramic-based abradable sealing material, coating, composite coating and preparation method
The invention discloses a ceramic-based abradable sealing material, a coating, a composite coating and a preparation method. The ceramic-based abradable sealing material is composed of 172-186 parts by mass of 8YSZ/RE3NbO7 powder, 6-10 parts by mass of Ni powder, 4-10 parts by mass of h-BN powder and 4-8 parts by mass of PHB, wherein the RE element is Dy, Sm or La; the 8YSZ/RE3NbO7 powder is obtained by ball-milling and calcining Y2O3 powder, ZrO2 powder and RE3NbO7 powder, wherein the mass ratio of the Y2O3 powder to the ZrO2 powder to the RE3NbO7 powder is 2:25:1. Accoridng to the invention,8YSZ/RE3NbO7 powder is prepared through a ball milling method and a solid-phase sintering method, then soft-phase h-BN, a pore forming agent PHB and bonding-phase Ni powder are doped into the 8YSZ/RE3NbO7 powder; the bonding strength of a base body is improved through the Ni powder, and the ceramic-based abradable sealing material which is moderate in hardness, good in bonding strength with the base body and excellent in thermal shock resistance is obtained. Besides, the material is subjected to plasma spraying, so that the ceramic-based abradable sealing coating with excellent anti-seismic property is obtained, the ceramic-based abradable sealing coating can be suitable for the friction surface of a stationary blade, and the gas path sealing performance of an aerospace engine and a gas turbine is improved.
本发明公开了一种陶瓷基可磨耗封严材料、涂层、复合涂层及制备方法，由172～186质量份的8YSZ/RE3NbO7粉末、6～10质量份的Ni粉、4～10质量份的h‑BN粉末和4～8质量份的PHB组成；RE元素为Dy元素、Sm元素或La元素；其中，8YSZ/RE3NbO7粉末由Y2O3粉末、ZrO2粉末及RE3NbO7粉末球磨和煅烧后得到，且Y2O3粉末、ZrO2粉末及RE3NbO7粉末的质量比为2：25：1；本发明通过球磨法和固相烧结法制备8YSZ/RE3NbO7粉末，再向其内掺杂软相h‑BN、造孔剂PHB及粘接相Ni粉，通过Ni粉提高基体结合强度，得到硬度适中、与基体结合强度良好及抗热震性能优的陶瓷基可磨耗封严材料，在将该材料进行等离子喷涂，进而得出抗震性能优良好的陶瓷基可磨耗封严涂层，可适用于静叶的摩擦表面，提升航空航天发动机和燃气轮机的气路封闭性。
Ceramic-based abradable sealing material, coating, composite coating and preparation method
一种陶瓷基可磨耗封严材料、涂层、复合涂层及制备方法
WANG FENG (author) / YANG QIONGLIAN (author) / ZHANG XIQIAN (author) / WANG JUN (author) / LI ZHENJUN (author) / FENG JING (author)
2020-11-03
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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