Boron Condensation from Glow Discharge

Abstract

The efficiency and morphology of boron deposition have been investigated in a glow discharge, using a BCl3-H2 mixture. The efficiency of reaction depends on the initial BCl3 concentration and the gas flowrate. The maximum efficiency was 27% at 800° C using an initial BCl3 concentration of between 0.2 and 10 vol. -%. Under these conditions the boron condensed on the caihode as slightly overlapping spiral crystals. The quantity of condensed boron increases linearly with higher initial BCl3 concentration, and thus the reaction should be considered as being first order relative to the BCl3 concentration.

Aluminizing and boroaluminizing treatments of Mar-M247 and their effect on hot corrosion resistance in Na2SO4−NaCl molten salt

“…The phases appeared on the surface of boroaluminized specimen consisted mainly of the NiAl phase, which was similar to the results for the as-aluminized specimens. The peak intensity of the NiAl (211) plane in the case of the boroaluminized specimen increased after heat treatment [18]. In the case of the aluminized specimen, the peak intensities of the NiAl (200) and (100) planes increased slightly.…”

Boración de aceros

“…La proporción de BCI3 es muy pequeña, para impedir la formación de FeCb (corrosión). [4,7,418,26,35,41,47,49,53,62,65,68,78,79,80,82,88,93,94,112,114] Las piezas a recubrir son polarizadas negativamente a un alto potencial para crear el régimen de descarga luminiscente necesario para las reacciones en fase gaseosa.…”