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Ultrafast laser welding method applied to ceramics
The invention relates to the technical field of ceramic connection, in particular to an ultrafast laser welding method applied to ceramics. According to the method, the joint of the ceramic workpieceis irradiated through ultrafast laser, the ceramic absorbs photon energy, a nonlinear absorption phenomenon is induced under high power density, the ceramic at the focus is fused instantaneously, theatomic activity is greatly improved, and then elements at the joint of the ceramic workpiece are diffused to form welding spots. Due to the fact that the ultrafast laser action time is extremely short, heat cannot be dissipated in time, and a heat-affected zone is extremely small. Reliable connection of ceramic can be achieved by changing relevant parameters of ultrafast laser, and the phenomenonof weld joint cracking caused by thermal stress can be greatly reduced. By the adoption of the method, the welding stress of the weld joint can be reduced, cracks at the weld joint are avoided, and fusion welding of the ceramic is achieved under the condition that ablation does not occur.
本发明涉及陶瓷连接技术领域，具体地说是一种陶瓷的超快激光焊接方法。该方法通过超快激光对陶瓷工件结合处进行辐照，陶瓷吸收光子能量，在高功率密度下诱导出非线性吸收现象，焦点处的陶瓷发生瞬时熔融，原子活性大大提高，进而陶瓷工件结合处的元素发生扩散现象，形成焊点。由于超快激光作用时间极短，热量来不及散失，热影响区极小。通过改变超快激光相关参数，既可以实现陶瓷的可靠连接，又可以大大降低有热应力导致焊缝开裂的现象。本发明采用上述方法，可降低焊缝的焊接应力，避免焊缝处裂纹产生，在不出现烧蚀的情况下实现陶瓷的熔融焊接。
Ultrafast laser welding method applied to ceramics
The invention relates to the technical field of ceramic connection, in particular to an ultrafast laser welding method applied to ceramics. According to the method, the joint of the ceramic workpieceis irradiated through ultrafast laser, the ceramic absorbs photon energy, a nonlinear absorption phenomenon is induced under high power density, the ceramic at the focus is fused instantaneously, theatomic activity is greatly improved, and then elements at the joint of the ceramic workpiece are diffused to form welding spots. Due to the fact that the ultrafast laser action time is extremely short, heat cannot be dissipated in time, and a heat-affected zone is extremely small. Reliable connection of ceramic can be achieved by changing relevant parameters of ultrafast laser, and the phenomenonof weld joint cracking caused by thermal stress can be greatly reduced. By the adoption of the method, the welding stress of the weld joint can be reduced, cracks at the weld joint are avoided, and fusion welding of the ceramic is achieved under the condition that ablation does not occur.
本发明涉及陶瓷连接技术领域，具体地说是一种陶瓷的超快激光焊接方法。该方法通过超快激光对陶瓷工件结合处进行辐照，陶瓷吸收光子能量，在高功率密度下诱导出非线性吸收现象，焦点处的陶瓷发生瞬时熔融，原子活性大大提高，进而陶瓷工件结合处的元素发生扩散现象，形成焊点。由于超快激光作用时间极短，热量来不及散失，热影响区极小。通过改变超快激光相关参数，既可以实现陶瓷的可靠连接，又可以大大降低有热应力导致焊缝开裂的现象。本发明采用上述方法，可降低焊缝的焊接应力，避免焊缝处裂纹产生，在不出现烧蚀的情况下实现陶瓷的熔融焊接。
Ultrafast laser welding method applied to ceramics
一种应用于陶瓷的超快激光焊接方法
LI XIAOPENG (author) / ZHI XINTAO (author) / FENG JING (author) / PENG YONG (author) / WANG KEHONG (author) / ZHOU QI (author) / WANG DASEN (author) / YUAN SONGMEI (author)
2020-08-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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