Metal oxide nanoparticle-based coating as a catalyzer for A-TIG welding : critical raw material perspective

Baloš, Sebastian (avtor), Dramićanin, Miroslav D. (avtor), Janjatovic, Petar (avtor), Zabunov, Ivan (avtor), Klobčar, Damjan (avtor), Bušić, Matija (avtor), Grilli, Maria Luisa (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: oxide coating, nanoparticles, TIG welding, penetration depth
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2019
• Št. strani: 12 str.
• Številčenje: Vol. 9, iss. 5, art. 567
• PID: 20.500.12556/RUL-132329
• UDK: 621.791(045)
• ISSN pri članku: 2075-4701
• DOI: 10.3390/met9050567
• COBISS.SI-ID: 16623131
• Datum objave v RUL: 21.10.2021

Gradivo je del revije

• Naslov: Metals
• Skrajšan naslov: Metals
• Založnik: MDPI AG
• ISSN: 2075-4701
• COBISS.SI-ID: 15976214

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 15.05.2019

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: oksidne prevleke, nanodelci, varjenje TIG, globina penetracije

Projekti

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: COST
• Naslov: Solutions for Critical Raw Materials under Extreme Conditions