https://unilib.phaidrabg.rs/o:5852 cobiss:121286153 ISBN: 978-86-7827-052-9 Proceedings International October Conference on Mining and Metallurgy (53 ; 2022 ; Bor) startpage: 93 endpage: 96 Reasons for brazing with copper filler metal alloyed with the copper (I) and iron (III) oxides info:eu-repo/semantics/conferenceProceedings application/pdf 1369949 bytes Keywords: copper filler metal, Cu2O, Fe3O4, wetting proprerites, capillary properties. Abstract: Brazing history is a pretty long, might be over 5000 years. In the new era, it is accepted that the brazing filler metal must contain pure metal(s) or more frequently the pure alloys. Pureness here means the absence of various non-metallic inclusions and/or oxides in filler metal: it is explainable by the reduction of mechanical or other important servicing properties. It is wide accepted that during provi-ding the process of brazing (also soldering), the wetting properties are also reduced if the mentioned non-metallic inclusions or oxides are present in the filler metal. Attempts should be respectable, and so one could find that in copper filler metal intentionally were added copper(I) and iron(III) oxides, but without explanations about the mechanism of such acting. It is evident that these oxides have shown a positive effect on wettability when brazing is done using such combination of copper-oxides. 2022 eng All rights reserved Karastojković, Zoran Kostov, Ana Perić, Radiša