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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)

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Izvleček
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 (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2019
Št. strani:12 str.
Številčenje:Vol. 9, iss. 5, art. 567
UDK:621.791(045)
ISSN pri članku:2075-4701
DOI:10.3390/met9050567 Povezava se odpre v novem oknu
COBISS.SI-ID:16623131 Povezava se odpre v novem oknu
Število ogledov:86
Število prenosov:35
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Gradivo je del revije

Naslov:Metals
Skrajšan naslov:Metals
Založnik:MDPI
ISSN:2075-4701
COBISS.SI-ID:15976214 Povezava se odpre v novem oknu

Gradivo je financirano iz projekta

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

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

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