Sintering Kinetics of Austenitic Stainless Steel AISI 316L Modified with Nanographite Particles with Highly Developed BET Specific Surface Area

The subject of this work was the study of processes occurring during sintering of water atomized AISI 316L austenitic stainless steel powder modified by the addition of graphite nanoparticles. The main purpose of the work was to determine the effect of modification of the AISI 316L stainless steel a...

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Bibliographic Details
Published in:Materials 2020-10, Vol.13 (20), p.4569
Main Authors: Kozub, Barbara, Kazior, Jan, Szewczyk-Nykiel, Aneta
Format: Article
Language:English
Subjects:
Atomizing
Austenitic stainless steels
Boron
Carbon
Chemical reduction
Corrosion resistance
Ferritic stainless steel
Grain boundaries
Graphite
Hydrogen
Kinetics
Molybdenum
Nanoparticles
Oxidation
Powder metallurgy
Sintering
Sintering (powder metallurgy)
Specific surface
Surface area
Thermal analysis
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Summary:The subject of this work was the study of processes occurring during sintering of water atomized AISI 316L austenitic stainless steel powder modified by the addition of graphite nanoparticles. The main purpose of the work was to determine the effect of modification of the AISI 316L stainless steel austenitic powder by the addition of graphite nanopowder on the sintering kinetics and oxide reduction mechanism. The phenomena occurring during the sintering process and oxide reduction mechanisms were subjected to detailed characterizations. Mixtures with two types of nanopowder with a high BET (measurement technique of the specific surface area of materials based on Brunauer–Emmett–Teller theory) specific surface area of 350 and 400 m2/g and for comparison with graphite micropowder with a poorly developed BET specific surface area of 15 m2/g were tested. The conducted thermal analysis showed that the samples made of austenitic stainless steel doped with 0.2% and 0.3% by weight graphite nanopowder with a BET specific surface area of 400 m2/g, sintered best the oxide reduction reactions, with a more intensive participation of carbon, for these samples.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma13204569