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Method for repairing microcracks in isostatic pressing forming of silicon carbide porous ceramic
The invention discloses a method for repairing microcracks in silicon carbide porous ceramic isostatic pressing forming, and belongs to the field of porous ceramic material preparation. The method comprises the following steps: carrying out capillary penetration on micro-cracks by adopting a repairing liquid, drying after the micro-cracks are filled with the repairing liquid, and finally sintering in a high-temperature furnace to obtain well-healed silicon carbide porous ceramic. According to the preparation method, the inorganic columnar fibers are mainly introduced, and the micro-cracks on the surface of the porous ceramic are repaired in a sol dipping manner, so that the yield in the isostatic pressing preparation process is increased, the problem of low strength after stress concentration due to the existence of the formed micro-cracks is solved, and the service life of the silicon carbide porous ceramic under complex working conditions is prolonged.
本发明公开了一种碳化硅多孔陶瓷等静压成型中微裂纹的修复方法，属于多孔陶瓷材料制备领域。该方法采用修复液对微裂纹处进行毛细管渗透，待微裂纹充满修复液后进行烘干处理，最后放入高温炉中烧结获得愈合完好的碳化硅多孔陶瓷。本发明主要将引入无机柱状纤维，通过溶胶浸渍方式修复多孔陶瓷表面微裂纹，提升了等静压制备过程中的成品率，解决了因成型微裂纹存在导致应力集中后强度低的问题，延长了碳化硅多孔陶瓷在复杂工况下的使用寿命。
Method for repairing microcracks in isostatic pressing forming of silicon carbide porous ceramic
The invention discloses a method for repairing microcracks in silicon carbide porous ceramic isostatic pressing forming, and belongs to the field of porous ceramic material preparation. The method comprises the following steps: carrying out capillary penetration on micro-cracks by adopting a repairing liquid, drying after the micro-cracks are filled with the repairing liquid, and finally sintering in a high-temperature furnace to obtain well-healed silicon carbide porous ceramic. According to the preparation method, the inorganic columnar fibers are mainly introduced, and the micro-cracks on the surface of the porous ceramic are repaired in a sol dipping manner, so that the yield in the isostatic pressing preparation process is increased, the problem of low strength after stress concentration due to the existence of the formed micro-cracks is solved, and the service life of the silicon carbide porous ceramic under complex working conditions is prolonged.
本发明公开了一种碳化硅多孔陶瓷等静压成型中微裂纹的修复方法，属于多孔陶瓷材料制备领域。该方法采用修复液对微裂纹处进行毛细管渗透，待微裂纹充满修复液后进行烘干处理，最后放入高温炉中烧结获得愈合完好的碳化硅多孔陶瓷。本发明主要将引入无机柱状纤维，通过溶胶浸渍方式修复多孔陶瓷表面微裂纹，提升了等静压制备过程中的成品率，解决了因成型微裂纹存在导致应力集中后强度低的问题，延长了碳化硅多孔陶瓷在复杂工况下的使用寿命。
Method for repairing microcracks in isostatic pressing forming of silicon carbide porous ceramic
一种碳化硅多孔陶瓷等静压成型中微裂纹的修复方法
HAN FENG (author) / ZHONG ZHAOXIANG (author) / WEI WEI (author) / XING WEIHONG (author)
2024-09-03
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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