Diffusion Barriers Minimizing the Strength Degradation of Reactive Air Brazed Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ Membranes during Aging.

ABSTRACT: The separation of oxygen from air by means of inorganic ceramic membranes requires gas-tight ceramic-metal joints that enable reliable permeation operation in the oxygen partial pressure gradient at 850 °C. Reactive air brazing is a promising method to solve this challenge. However, reactive air brazed BSCF membranes suffer from a significant strength degradation that is caused by unhindered diffusion from the metal component during aging. In this study, we investigated how diffusion layers applied on the austenitic steel AISI 314 influence the bending strength of BSCF-Ag3CuO-AISI314 joints after aging. Three different approaches were compared as diffusion barriers: (1) aluminizing via pack cementation, (2) spray coating with NiCoCrAlReY, and (3) spray coating with NiCoCrAlReY and an addit

SUBMITTER: Herzog S 

PROVIDER: S-EPMC10221055 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature