On the possibility of the electron-beam welding of quartz glasses by a forevacuum plasma electron source

Abstract

The article demonstrates a principle possibility of the electron-beam welding of high-temperature quartz glasses by a plasma electron source operating in the forevacuum range of pressure of 10–50 Pa. We studied the dependence of the composition of the gas atmosphere in the vacuum chamber on the heating temperature of the weld seam. It is shown that the optimal temperature of the weld seam for melting and minimum mass entrainment from the molten pool is 1300–1400 °C. We determined the welding regime for cylindrical tubes and rods that provides high seam strength, reaching 90–95% of the original strength of quartz glass.