Brazing ZrO2 ceramic to Ti–6Al–4V alloy using NiCrSiB amorphous filler foil: Interfacial microstructure and joint properties
Brazing ZrO2 ceramic to Ti–6Al–4V alloy using NiCrSiB amorphous filler foil: Interfacial microstructure and joint properties
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DOI：
10.1016/j.matchar.2013.04.009
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发表时间：
2013-07
影响因子：
4.7
通讯作者：
J. Cao;Xiaoguo Song;Chun Li;Liancheng Zhao;Jiecai Feng
中科院分区：
文献类型：
--
作者：
J. Cao;Xiaoguo Song;Chun Li;Liancheng Zhao;Jiecai Feng
采用NiCrSiB非晶钎料实现了ZrO 2陶瓷与Ti-6Al-4V合金的可靠钎焊。采用扫描电镜、能谱仪和微聚焦X射线衍射仪对ZrO 2/Ti-6Al-4V接头界面微观结构进行了分析。研究了钎焊温度对钎焊接头界面组织和连接性能的影响。Ti-6Al-4V合金中的活性Ti溶于钎料熔体中，与ZrO 2陶瓷反应形成连续的TiO反应层，在钎焊过程中起重要作用。钎焊接头中形成了Ti 2Ni、Ti 5Si 3和β-Ti等多种反应相。随着钎焊温度的升高，TiO层逐渐增厚，Ti 2Ni含量逐渐减少。剪切试验表明，钎焊接头易在ZrO 2陶瓷与钎缝或Ti 2Ni金属间化合物层的界面处断裂。当钎焊温度为1025°C，保温时间为10 min时，试样的平均剪切强度达到最大值284.6MPa。
Reliable brazing of ZrO2ceramic and Ti–6Al–4V alloy was achieved using NiCrSiB amorphous filler foil. The interfacial microstructure of ZrO2/Ti–6Al–4V joints was characterized by scanning electron microscope, energy dispersive spectrometer and micro-focused X-ray diffractometer. The effects of brazing temperature on the interfacial microstructure and joining properties of brazed joints were investigated in detail. Active Ti of Ti–6Al–4V alloy dissolved into molten filler metal and reacted with ZrO2ceramic to form a continuous TiO reaction layer, which played an important role in brazing. Various reaction phases including Ti2Ni, Ti5Si3and β-Ti were formed in brazed joints. With an increasing of brazing temperature, the TiO layer thickened gradually while the Ti2Ni amount reduced. Shear test indicated that brazed joints tend to fracture at the interface between ZrO2ceramic and brazing seam or Ti2Ni intermetallic layer. The maximum average shear strength reached 284.6MPa when brazed at 1025°C for 10min.