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Method for connecting silicon carbide ceramics by using microcrystalline glass solder for in-situ generation of anorthite
The invention relates to a method for connecting silicon carbide ceramics by using a glass ceramic solder, in particular to a method for connecting silicon carbide ceramics by using a glass ceramic solder for generating anorthite in situ. The invention aims to solve the technical problems that the existing nuclear fuel cladding material is high in brittleness, difficult to process and extremely easy to corrode and irradiate and grow. The CaO-Al2O3-SiO2 (CAS) glass ceramic solder is designed, anorthite crystals (CaAl2Si2O8) are generated on CAS glass in situ in the welding process, the thermal expansion coefficient of the CAS glass ceramic is better matched with that of SiC ceramic base metal, and therefore the residual stress in a connector is effectively reduced; in addition, anorthite crystals grow up in a welding seam and are interwoven together, so that the toughness and the strength of the CAS microcrystalline glass are effectively improved, the mechanical property of a SiC joint is improved, and the applicability of the joint in an irradiation environment is ensured.
一种利用原位生成钙长石的微晶玻璃焊料连接碳化硅陶瓷的方法，涉及一种利用微晶玻璃焊料连接碳化硅陶瓷的方法。本发明是要解决目前核燃料包壳材料脆性大、难加工、极易出现腐蚀、辐照生长的技术问题。本发明设计了CaO‑Al2O3‑SiO2(CAS)微晶玻璃焊料，通过在焊接过程中CAS玻璃原位生成钙长石晶体(CaAl2Si2O8)，使CAS微晶玻璃的热膨胀系数与SiC陶瓷母材更匹配，从而有效降低接头内的残余应力；此外钙长石晶体在焊缝内长大并且相互交织在一起，有效的提高了CAS微晶玻璃的韧性以及强度，从而提高了SiC接头的力学性能，并且保证了接头在辐照环境下的可应用性。
Method for connecting silicon carbide ceramics by using microcrystalline glass solder for in-situ generation of anorthite
The invention relates to a method for connecting silicon carbide ceramics by using a glass ceramic solder, in particular to a method for connecting silicon carbide ceramics by using a glass ceramic solder for generating anorthite in situ. The invention aims to solve the technical problems that the existing nuclear fuel cladding material is high in brittleness, difficult to process and extremely easy to corrode and irradiate and grow. The CaO-Al2O3-SiO2 (CAS) glass ceramic solder is designed, anorthite crystals (CaAl2Si2O8) are generated on CAS glass in situ in the welding process, the thermal expansion coefficient of the CAS glass ceramic is better matched with that of SiC ceramic base metal, and therefore the residual stress in a connector is effectively reduced; in addition, anorthite crystals grow up in a welding seam and are interwoven together, so that the toughness and the strength of the CAS microcrystalline glass are effectively improved, the mechanical property of a SiC joint is improved, and the applicability of the joint in an irradiation environment is ensured.
一种利用原位生成钙长石的微晶玻璃焊料连接碳化硅陶瓷的方法，涉及一种利用微晶玻璃焊料连接碳化硅陶瓷的方法。本发明是要解决目前核燃料包壳材料脆性大、难加工、极易出现腐蚀、辐照生长的技术问题。本发明设计了CaO‑Al2O3‑SiO2(CAS)微晶玻璃焊料，通过在焊接过程中CAS玻璃原位生成钙长石晶体(CaAl2Si2O8)，使CAS微晶玻璃的热膨胀系数与SiC陶瓷母材更匹配，从而有效降低接头内的残余应力；此外钙长石晶体在焊缝内长大并且相互交织在一起，有效的提高了CAS微晶玻璃的韧性以及强度，从而提高了SiC接头的力学性能，并且保证了接头在辐照环境下的可应用性。
Method for connecting silicon carbide ceramics by using microcrystalline glass solder for in-situ generation of anorthite
一种利用原位生成钙长石的微晶玻璃焊料连接碳化硅陶瓷的方法
ZHANG JIE (author) / SHAN TIPENG (author) / LIU CHUNFENG (author) / BANG GUN (author) / SUN LIANGBO (author)
2022-03-18
Patent
Electronic Resource
Chinese
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