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Interfacial microstructure and mechanical properties of ZTA/ZTA joints brazed with Ni-Ti filler metal
Journal of the European Ceramic Society ( IF 5.7 ) Pub Date : 2020-11-04 , DOI: 10.1016/j.jeurceramsoc.2020.10.073
Kaihong Zheng , Qi Zhang , Juan Wang , Yao Lu

The reliable brazing of the ZTA ceramic joints was successfully obtained using Ni-Ti filler metal. The microstructure and mechanical properties of the joints brazed at different temperatures were investigated. During the process of brazing, both Al2O3 and ZrO2 in the ZTA reacted with the Ni-Ti filler, resulting in the formation of the AlNi2Ti + Ni2Ti4O reaction layer adjacent to the ZTA substrate when brazed at 1350 °C for 30 min. NiTi and Ni3Ti compounds precipitated at the center of brazing seam. When the brazing temperature increased from 1320 °C to 1380 °C, the thickness of AlNi2Ti + Ni2Ti4O layer increased gradually. As the brazing temperature varied from 1400 °C to 1450 °C, TiO was formed adjacent to the ZTA substrate, along with the reduction of Ni2Ti4O. AlNi2Ti distributed at the interface and center of brazing seam. The maximum shear strength of 152 MPa was obtained when brazed at 1420 °C for 30 min.



中文翻译:

Ni-Ti钎料钎焊ZTA / ZTA接头的界面组织和力学性能

使用Ni-Ti填充金属成功地获得了ZTA陶瓷接头的可靠钎焊。研究了在不同温度下钎焊接头的组织和力学性能。在钎焊过程中,ZTA中的Al 2 O 3和ZrO 2都与Ni-Ti填料反应,导致在钎焊时,与ZTA基板相邻的AlNi 2 Ti + Ni 2 Ti 4 O反应层的形成。 1350°C 30分钟。NiTi和Ni 3 Ti化合物沉淀在钎焊缝的中心。当钎焊温度从1320°C升高到1380°C时,AlNi 2 Ti + Ni 2 Ti的厚度4 O层逐渐增加。由于钎焊温度从1400℃变化到1450℃,二氧化钛,形成相邻于ZTA基板,用Ni的减小沿着2的Ti 4 O. AlNi金属2的Ti在界面处和钎缝的中心分布。在1420°C钎焊30分钟时,可获得152 MPa的最大剪切强度。

更新日期:2020-12-01
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