Microstructure evolution of Al2O3/Al2O3 joint brazed with Ag–Cu–Ti+B+TiH2 composite filler
Source abstract
Abstract
Abstract Al 2 O 3 /Al 2 O 3 joint was achieved using Ag–Cu–Ti + B + TiH 2 composite fillers at 900 °C for 10 min. The evolution mechanism of interface during brazing was discussed. Effects of Ti and B atoms content on microstructure of joints were investigated. Results show that a continuous and compact reaction layer Ti 3 (Cu,Al) 3 O forms at Al 2 O 3 /brazing alloy interface. Ti(Cu,Al) precipitates near Ti 3 (Cu,Al) 3 O layer. In situ synthesized TiB whiskers evenly distribute in Ag and Cu based solid solution. The higher content of B powders in composite fillers increases TiB whiskers content, but decreases the thickness of Ti 3 (Cu,Al) 3 O layer, while the higher TiH 2 powders content thickens Ti 3 (Cu,Al) 3 O layer. Ag and Cu based solid solutions become uniform and fine with the increasing of TiB whiskers content. Ti(Cu,Al) intermetallics content increase and they gradually distribute from Al 2 O 3 side to the central of brazing alloy, but the content of Cu based solid solution decreases when the TiH 2 content increases.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Aluminum Alloys Composites Properties · Advanced materials and composites
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