Joining of Zirconia and Ti-6A1-4V Using a Ti-based Amorphous Filler

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• 作者：Yuhua  ; Liu^a ; Jiandong  ; Hu^a ; Yaping  ; Zhang^a ; Zuoxing  ; Guo^a ;   ; ^{guozx@jlu.edu.cn} ; Yue  ; Yang^b
• 关键词：Brazing ; Amorphous filler ; Interface ; Microstructure ; Shear strength
• 刊名：Journal of Materials Science & Technology
• 出版年：2011
• 出版时间：2011
• 年：2011
• 卷：27
• 期：7
• 页码：653-658
• 全文大小：1084 K

文摘

Polycrystalline ZrO₂-3 mol. % Y₂O₃ was brazed to Ti-6AI-4V by using a Ti₄₇Zr₂₈Cu_4lNi₁₁(at. % ) amorphous ribbon at 1123?273 K in a high vacuum. The influences of brazing temperature on the microstructure and shear strength of the joints were investigated. The interfacial microstructures can be described as ZrO₂/TiO+TiO₂+Cu₂Ti₄O+Ni₂Ti₄O/¦Á-Ti+(Ti,Zr)₂(Cu,Ni) eutectic/acicular Widmanst?ten structure/Ti-6AI-4V alloy. With the increase in the brazing temperature, the thickness of the TiO+TiO₂+Cu₂Ti₄ O+Ni₂Ti₄ O layer reduced, the content of the ¦Á-Ti+(Ti,Zr)₂(Cu,Ni) eutectic phase decreased, while that of the coarse ¦Á-Ti phase gradually increased. The shear strength of the joints did not show a close relationship with the thickness of the TiO+TiO₂+Cu₂Ti₄O+Ni₂Ti₄O layer. However, when the coarse (Ti,Zr)₂(Cu,Ni) phase was non-uniformly distributed in the ¦Á-Ti phase, or when ¦Á-Ti solely situated at the center of the joint, forming a coarse block or even connecting into a continuous strip, the shear strength greatly decreased.