Metal oxide nanoparticle-based coating as a catalyzer for A-TIG welding

critical raw material perspective

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

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 SiO2 and TiO2 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.

Keywords

oksidne prevleke;nanodelci;varjenje TIG;globina penetracije;oxide coating;nanoparticles;TIG welding;penetration depth;

Data

Language:	English
Year of publishing:	2019
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	621.791(045)
COBISS:	16623131
ISSN:	2075-4701
Views:	241
Downloads:	79
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	oksidne prevleke;nanodelci;varjenje TIG;globina penetracije;
Type (COBISS):	Article
Pages:	f. 1-12
Volume:	ǂVol. ǂ9
Issue:	ǂiss. ǂ5
Chronology:	2019
DOI:	10.3390/met9050567
ID:	13729710