Wettability of boron carbide
- SINTEF Metallurgy, Trondheim (Norway)
- Norwegian Inst. of Tech., Trondheim (Norway). Dept. of Metallurgy
The wettability of boron carbide has been examined by means of the sessile drop method, using the following candidate alloys: (96wt%AG-4wt%Ti), (Ag-26.5wt%Cu-3wt%Ti), (Sn-10wt%Ag-4wt%Ti), Sn(99.95wt%) and Al(99.99wt%). The results show that B{sub 4}C is completely wetted by the Ag-based alloys. Sn-10wt%Ag-4wt%Ti alloy and pure Al partly wet the B{sub 4}C surface, while pure Sn does not wet B{sub 4}C at all. For all the alloys used, except pure Sn, a reaction layer was observed at the interface between the ceramic part and the metal drop. Although the spreading kinetics of the Al-drop was much slower compared with the Ti-containing alloys, the reaction rate was considerably higher in the former case. This suggests that aluminium is an attractive candidate material for brazing of B{sub 4}C. Formation of the low melting B{sub 2}O{sub 3} at the B{sub 4}C surface may cause oxidation of the filler metal during joining, which, in turn, leads to a low bond strength.
- OSTI ID:
- 445289
- Report Number(s):
- CONF-940367-; ISBN 0-87171-441-8; TRN: 97:005101
- Resource Relation:
- Conference: advanced joining technologies for new materials II conference, Cocoa Beach, FL (United States), 2-4 Mar 1994; Other Information: PBD: 1994; Related Information: Is Part Of Advanced joining technologies for new materials 2: Proceedings; PB: 298 p.
- Country of Publication:
- United States
- Language:
- English
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