Metallurgical reactions controlling the brazing of Al2O3 with Ag-Cu-Ti filler alloys

被引：30
|
作者：
Paulasto, M [1 ]
Kivilahti, J [1 ]
机构：
[1] Helsinki Univ Technol, Dept Mat Sci & Engn, FIN-02150 Espoo, Finland
来源：
JOURNAL OF MATERIALS RESEARCH | 1998年 / 13卷 / 02期
基金：
芬兰科学院;
关键词：
D O I：
10.1557/JMR.1998.0046
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Metallurgical reactions controlling the Ti activation in brazing of Al2O3 have been studied by means of microstructural and thermodynamic analysis. The reactions of titanium with oxygen and copper are shown to be decisive in active brazing. The miscibility gap in the Ag-Cu-Ti system divides the liquid braze into Ag-rich (L1) and TiCu-rich (L2) liquids. The liquid L2 reacts with alumina forming the mixed oxide (Ti, Al)(4)Cu2O. Besides with alumina, Ti reacts with oxygen that the filler alloys usually contain and forms a brittle ribbon composed of TixO and Ti-Cu-O phases in the braze, The formation of Ti oxides next to the alumina is possible only in the filler alloys of highest Ag content.
引用
收藏
页码：343 / 352
页数：10
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