Brazing the beryllium window in copper frame by silver brazing alloy

Fokanov A.N., Podurazhnaya V.F., Tebyakin А.V., Kas’kov V.S.
UDC
621.791
DOI
10.18577/2307-6046-2016-0-11-1-1
Article PDF (Russian) (837.82 KB)
How to cite
Fokanov A.N., Podurazhnaya V.F., Tebyakin А.V., Kas’kov V.S. Brazing the beryllium window in copper frame by silver brazing alloy // Proceedings of VIAM. 2016. No. 11. DOI: 10.18577/2307-6046-2016-0-11-1-1. URL: https://test.viam.ru/en/journal/2016/11/1
Keywords
brazing, beryllium windows, copper, silver brazing alloy, structure, vacuum density.
Abstract

The article shows the results of research on brazing the beryllium window in a copper frame by the silver 72Ag–28Cu Cusil hard brazing alloy and study of the structure and vacuum density of the brazing joint. Manufacturing techniques and preparations of products for the brazing were developed, brazing modes on the flat simulator and the bent beryllium window were chosen. A batch of bent brazing beryllium windows which successfully passed tests for vacuum density after heating to 650°C during 0,5 h was made. The structure of brazing joints of beryllium with copper was analyzed. In microstructure of brazing the zone of fusing of beryllium and brazing alloy with partial dissolution of beryllium in brazing alloy is registered as well as Cusil brazing zone with copper dissolution. In zone of fusing of beryllium with Cusil two transitional layers in the form of intermetallic phases are observed. In the zone of Cusil brazing alloy there is the presence of Ag–Cu alloy with different concentra

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