Surface analysis of iron and steel nanopowder

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Fältnamn	Indikatorer	Metadata
000		04445naa a2200469 4500
001		oai:research.chalmers.se:2c83d35e-eb8f-415f-849f-a8ddf715fde1
003		SwePub
008		180810s2018 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://doi.org/10.1002/sia.64652 DOI
024	7	a https://research.chalmers.se/publication/5044322 URI
040		a (SwePub)cth
041		a engb eng
042		9 SwePub
072	7	a art2 swepub-publicationtype
072	7	a ref2 swepub-contenttype
100	1	a Manchili, Swathi Kiranmayee,d 1987u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)manchili
245	1 0	a Surface analysis of iron and steel nanopowder
264		c 2018-05-10
264	1	b Wiley,c 2018
520		a High sinter density is desired in powder metallurgy components as the requirement for performance is increasing day‐by‐day. One of the promising ways to achieve improved densification during sintering is through the addition of nanopowder to the conventional micrometer sized metal powder. It is well known that the surface chemistry of the powder has a decisive effect on sintering and consequently the properties of the components produced. Extensive research has hence been conducted to elucidate the surface chemistry and its influence on sintering for powder used in conventional powder metallurgy. Nanopowder, owing to high surface to volume ratio, can contribute to the activation of sintering at lower temperatures and enhance the sinter density. In this context, the surface chemistry of the nanopowder is also expected to exhibit substantial influence on sintering. The present investigation is aimed at establishing a methodology to study the surface chemistry and oxide thickness of nanopowder. For this purpose, iron nanopowder of 3 different size fractions: 35 to 45, 40 to 60, and 60 to 80 nm with core‐shell structure were studied. Different approaches were adopted to evaluate the shell thickness of the iron nanoparticles. The methodology was developed and tried on low alloy steel nanopowder to measure oxide thickness. X‐ray photoelectron spectroscopy, thermogravimetry, and high‐resolution scanning electron microscopy techniques were used to study the nanopowder. Results from different core‐shell models for iron nanopowder were found to be consistent except in the case where depth profiling was taken into account. The results were in agreement with the values obtained from thermogavimetry‐surface area correlation.
650	7	a TEKNIK OCH TEKNOLOGIERx Maskinteknik0 (SwePub)2032 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Mechanical Engineering0 (SwePub)2032 hsv//eng
650	7	a TEKNIK OCH TEKNOLOGIERx Materialteknik0 (SwePub)2052 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Materials Engineering0 (SwePub)2052 hsv//eng
650	7	a TEKNIK OCH TEKNOLOGIERx Materialteknikx Bearbetnings-, yt- och fogningsteknik0 (SwePub)205052 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Materials Engineeringx Manufacturing, Surface and Joining Technology0 (SwePub)205052 hsv//eng
650	7	a TEKNIK OCH TEKNOLOGIERx Materialteknikx Metallurgi och metalliska material0 (SwePub)205062 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Materials Engineeringx Metallurgy and Metallic Materials0 (SwePub)205062 hsv//eng
653		a X‐ray photoelectron spectroscopy
653		a sintering
653		a thermogravimetry
653		a nanopowder
700	1	a Shvab, Ruslan,d 1985u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)shuab
700	1	a Zehri, Abdelhafid,d 1989u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)hafid
700	1	a Ye, Lileiu SHT Smart High-Tech AB4 aut
700	1	a Hryha, Eduard,d 1980u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)hryha
700	1	a Liu, Johan,d 1960u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)jliu
700	1	a Nyborg, Lars,d 1958u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)nyborg
710	2	a Chalmers tekniska högskolab SHT Smart High-Tech AB4 org
773	0	t Surface and Interface Analysisd : Wileyg 50:11, s. 1083-1088-10886q 50:11<1083-1088-10886x 1096-9918x 0142-2421
856	4 8	u https://doi.org/10.1002/sia.6465
856	4 8	u https://research.chalmers.se/publication/504432

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