20.500.12556/RUL-132329 Metal oxide nanoparticle-based coating as a catalyzer for A-TIG welding critical raw material perspective Besides a wide application in corrosion protection, wear resistance increase, providing thermal properties and power conversion, oxide coatings have found an alternative application in welding technology as catalysts of the tungsten inert gas (TIG) welding process. In this paper, the novel approach of fabricating a coating containing nanoparticles based on nanosized SiO$_2$ and TiO$_2$ and their mixtures was applied to the austenitic stainless-steel base metal. It was found that coatings increased depths of penetration, enabling a consumable-free welding. Using this method, the use of several critical and near-critical raw materials (e.g., Si and Cr), as well as the relatively expensive Ni can be completely avoided. The most effective coating in terms of weld penetration consisted of a mixture of nanoparticles, rather than unary oxide coatings based on nanoparticles. A model for liquid weld metal flow is proposed based on the metallographic examination of recrystallized grains and microhardnesses measured near the weld metal, supporting the reversed Marangoni convection theory. oxide coating nanoparticles TIG welding penetration depth oksidne prevleke nanodelci varjenje TIG globina penetracije true false true Angleški jezik Slovenski jezik Članek v reviji 2021-10-21 14:26:06 2021-10-21 14:26:08 2022-09-12 04:11:56 0000-00-00 00:00:00 2019 0 0 12 str. iss. 5, art. 567 Vol. 9 2019 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.791(045) 2075-4701 10.3390/met9050567 16623131 RAZ_Balos_Sebastian_2019.pdf RAZ_Balos_Sebastian_2019.pdf 1 90BB3F351B22757FCF8B74A040B501B9 8268ecd010e1ec1ded760a8367aa973d7b5b8b24a20b1b63c5903f515fe58484 4943dffa-326a-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=149936 https://www.mdpi.com/2075-4701/9/5/567 1 0e026592-326a-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=149935 Fakulteta za strojništvo 0 0 0