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A platform for research: civil engineering, architecture and urbanism
Ceramic connecting piece as well as preparation method and application thereof
The invention belongs to the technical field of ceramic connection, and discloses a ceramic connecting piece and a preparation method and application thereof. The method comprises the following steps: mixing powder A and powder B (Re3Si2C2 and Re are rare earth elements), mixing the mixed powder with a solvent to prepare connecting slurry, coating the surface of ceramic with the connecting slurry to form a prefabricated connecting piece with a'ceramic-connecting slurry-ceramic 'sandwich structure, putting the prefabricated connecting piece into connecting equipment, and sintering at 1200-1500 DEG C in a protective atmosphere or vacuum under the pressure of 0.1-30MPa to obtain the ceramic-connecting slurry-ceramic sandwich structure. And preparing the ceramic connecting piece. The main phase of the connecting layer of the ceramic connecting piece is a ceramic material with a thermal expansion coefficient close to that of the ceramic matrix, so that the residual stress of a welded joint is greatly reduced, and a welding seam has good hydrothermal corrosion resistance and high-temperature resistance; and the composite material is widely applied to the packaging field of heat exchange tubes, hot end parts of aero-engines, thermal protection structures of aerospace vehicles or cladding tubes of nuclear power stations.
本发明属于陶瓷连接技术领域，公开了一种陶瓷连接件及其制备方法和应用。该方法是将粉体A和粉体B(Re3Si2C2，Re为稀土元素)混合，将混合粉体和溶剂混合，制得连接浆料，将连接浆料涂覆于陶瓷表面，形成“陶瓷‑连接浆料‑陶瓷”三明治结构的预制连接件，将该预制连接件放入连接设备，在保护气氛或真空下，加压0.1～30MPa，在1200～1500℃烧结，制得陶瓷连接件。该陶瓷连接件的连接层主相是与陶瓷基体热膨胀系数接近的陶瓷材料，大幅度降低焊接后接头的残余应力，且焊缝具有良好的抗水热腐蚀性能和抗高温性能，广泛应用于热交换管、航空发动机的热端部件、航空航天器的热防护结构或核电站的包壳管封装领域。
Ceramic connecting piece as well as preparation method and application thereof
The invention belongs to the technical field of ceramic connection, and discloses a ceramic connecting piece and a preparation method and application thereof. The method comprises the following steps: mixing powder A and powder B (Re3Si2C2 and Re are rare earth elements), mixing the mixed powder with a solvent to prepare connecting slurry, coating the surface of ceramic with the connecting slurry to form a prefabricated connecting piece with a'ceramic-connecting slurry-ceramic 'sandwich structure, putting the prefabricated connecting piece into connecting equipment, and sintering at 1200-1500 DEG C in a protective atmosphere or vacuum under the pressure of 0.1-30MPa to obtain the ceramic-connecting slurry-ceramic sandwich structure. And preparing the ceramic connecting piece. The main phase of the connecting layer of the ceramic connecting piece is a ceramic material with a thermal expansion coefficient close to that of the ceramic matrix, so that the residual stress of a welded joint is greatly reduced, and a welding seam has good hydrothermal corrosion resistance and high-temperature resistance; and the composite material is widely applied to the packaging field of heat exchange tubes, hot end parts of aero-engines, thermal protection structures of aerospace vehicles or cladding tubes of nuclear power stations.
本发明属于陶瓷连接技术领域，公开了一种陶瓷连接件及其制备方法和应用。该方法是将粉体A和粉体B(Re3Si2C2，Re为稀土元素)混合，将混合粉体和溶剂混合，制得连接浆料，将连接浆料涂覆于陶瓷表面，形成“陶瓷‑连接浆料‑陶瓷”三明治结构的预制连接件，将该预制连接件放入连接设备，在保护气氛或真空下，加压0.1～30MPa，在1200～1500℃烧结，制得陶瓷连接件。该陶瓷连接件的连接层主相是与陶瓷基体热膨胀系数接近的陶瓷材料，大幅度降低焊接后接头的残余应力，且焊缝具有良好的抗水热腐蚀性能和抗高温性能，广泛应用于热交换管、航空发动机的热端部件、航空航天器的热防护结构或核电站的包壳管封装领域。
Ceramic connecting piece as well as preparation method and application thereof
一种陶瓷连接件及其制备方法和应用
GUO WEIMING (author) / ZHOU HUAN (author) / WU LIXIANG (author) / XUE JIAXIANG (author) / LI YUN (author) / HE SHENGJIN (author) / LIN HUATAI (author)
2024-05-24
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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