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Intermetallic formation in a Ti–Cu dissimilar joint brazed using a Zr-based amorphous alloy filler

Authors :
Lee, Jung G.
Kim, G.H.
Lee, M.K.
Rhee, C.K.
Source :
Intermetallics. Apr2010, Vol. 18 Issue 4, p529-535. 7p.
Publication Year :
2010

Abstract

Abstract: Microstructural evolution of the Ti–Cu dissimilar joints brazed by a Zr41.2Ti13.8Cu12.5Ni10.0Be22.5 (at.%) amorphous alloy filler was investigated at a temperature of 820°C for 1–20min. As the brazing time increased, the overall composition of the joint sensitively changed from Ti-rich to Cu-rich owing to the different reactivity of the Zr in the filler with the Ti and Cu in the base metals. Based on such time-dependent compositional change, the formation of the intermetallic phases in the joint was basically divided into three stages; Stage (1): formation of interfacial Ti2Cu, Stage (2): formation of two-phase structure with Ti2Cu/TuCu and Cu2TiZr, and Stage (3): transformation to Cu-rich phases. At Stage (2), the joint was fully produced isothermally by directional phase transformations with fine dendritic and columnar two-phase structures, revealing the highest bonding strength due to its controlled intermetallic morphology. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
09669795
Volume :
18
Issue :
4
Database :
Academic Search Index
Journal :
Intermetallics
Publication Type :
Academic Journal
Accession number :
48469662
Full Text :
https://doi.org/10.1016/j.intermet.2009.10.005