RESEARCH OF THE BONDING MECHANISMS OF Al2O3/Cu-Ti-Zr/Nb

Abstract

Abstract: Ceramic Al2O3 is bonded with Nb using Cu-Ti-Zr as filler metal. The morphologies and chemical positions of the formed phases are investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS). It is found that the interface structure of diffusion-bonded joints bonded at 1 293 K for 10 min using Cu70Ti25Zr5 as braze is Al2O3/Cu2Ti4O/Ti solid solution/CuTi/Cu solid solution + CuTi due to the formation of new phases Cu2Ti4O, Ti solid solution and CuTi. Strength of the Al2O3/Cu70Ti25Zr5/Nb joint bonded at 1 293 K for 10 min can be reached to 162 Mpa. The lower the content of Ti and bonding time are, or the higher the content of Ti and bonding time are, lower strength of joints becomes.

Key words: Brazing, Ceramic, Interface structure, Nb, Shear strength

CLC Number:

TG454

Wu Mingfang;Yu Zhishui;Jiang Chengyu;Qi Kai. RESEARCH OF THE BONDING MECHANISMS OF Al2O3/Cu-Ti-Zr/Nb[J]. , 2001, 37(5): 81-84.

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RESEARCH OF THE BONDING MECHANISMS OF Al2O3/Cu-Ti-Zr/Nb

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