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Metal oxide nanoparticle-based coating as a catalyzer for A-TIG welding : critical raw material perspective
ID Baloš, Sebastian (Author), ID Dramićanin, Miroslav D. (Author), ID Janjatovic, Petar (Author), ID Zabunov, Ivan (Author), ID Klobčar, Damjan (Author), ID Bušić, Matija (Author), ID Grilli, Maria Luisa (Author)

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Abstract
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.

Language:English
Keywords:oxide coating, nanoparticles, TIG welding, penetration depth
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Version of Record
Year:2019
Number of pages:12 str.
Numbering:Vol. 9, iss. 5, art. 567
PID:20.500.12556/RUL-132329 This link opens in a new window
UDC:621.791(045)
ISSN on article:2075-4701
DOI:10.3390/met9050567 This link opens in a new window
COBISS.SI-ID:16623131 This link opens in a new window
Publication date in RUL:21.10.2021
Views:1805
Downloads:167
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Record is a part of a journal

Title:Metals
Shortened title:Metals
Publisher:MDPI AG
ISSN:2075-4701
COBISS.SI-ID:15976214 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:15.05.2019

Secondary language

Language:Slovenian
Keywords:oksidne prevleke, nanodelci, varjenje TIG, globina penetracije

Projects

Funder:Other - Other funder or multiple funders
Funding programme:COST
Name:Solutions for Critical Raw Materials under Extreme Conditions

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