Alumina-to-Alumina Actively Brazed Using Cu-Ti, Cu-Zr, and Eutectic Ag-Cu-Ti Filler-Metal Alloys
Pages: 150 - 162
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Participants:
F. A. Hashim |
M. J. Kadhim |
R. H. Yousif |
Summary:
Al2O3-Al2O3 brazing systems were produced using a one-stage actively brazed technique based on Cu-Ti, Cu-Zr, and Ag-Cu-Ti alloys. Single and double butt joints were used for microstructural and mechanical properties studies respectively. The joints that brazed by using Cu-Zr filler-metal alloys (2 %, 4 %, 6 %, and 8 % Zr weight percent) have been shown low shear strengths at the ZrO2 interface. Higher shear strength was obtained by using Cu-Ti filler-metal alloys (2 %, 4 %, 6 %, and 8 % Ti weight percent), and eutectic (Ag-26 % Cu-4 % Ti). As judged by the phases formed at the interface, Cu2 (AlTi)4O is more effective to wet and both alumina to alumina.