Antusch, S.

Commin, L.

Dafferner, B.

Hoffmann, J.

Jäntsch, U.

Rieth, M.

Ziegler, R.

English

KITopen

KIT - University of the State of Baden-Wuerttemberg and National Research Center of the Helmholtz Associationwww.kit.eduInstitute for Applied MaterialsHerrmann-von-Helmholtz-Platz 176744 Eggenstein-Leopoldshafenhttp://www.kit.eduProductionElectron-MicroscopyParticle distributionsmall particle size large particle sizeJan Hoffmann*, Steffen Antusch, Bernhard Dafferner, Lorelei Commin Ute Jäntsch, Michael Rieth, Rainer Ziegler, Karlsruhe Institute of Technology, Institute for Applied Materials IAM-AWP, Karlsruhe, GermanyThis project has received funding from the European community‘s Seventh framework program (FP7/2007-2013) under grant agreement N°269706 - MATTER Project.  The  chemical analysis group of KIT / IAM-AWP is aknowledged for the analysis of the impurities / oxygen content.*contact:Jan Hoffmanne-mail: j.hoffmann@kit.eduphone: +49 (0) 721 6082 3476Basic studies on processing of a large scale ODS batchIn this present study, a batch of 10 kg ferritic steel powder (Fe-13Cr-1W-0.3Ti) was mechanically alloyed in an attritor ball mill with Fe2Y intermetallic powder. Batches of 3-4 kg with different powder particle distribution were canned in mild steel containers and compacted by hot-isostatic-pressing (HIP). The separation of the 10 kg batch with a 90 µm sieve lead to a fraction of:3.9 kg < 90 µm and 5.4 kg > 90µmThe morphology and general appearance of the powder partic-les of each batch was simmilar. The oxygen content was measured seperately for both fractions:      O-content  SD   C-content   SD< 90 µm  :  0.087 wt.%  0,001  0.0214 wt.%  0,0001> 90 µm : 0.081 wt.% 0,002  0.0216 wt.%  0,0004Besides very minor variation in the O-levels, no other differences in the chemical composition and the contamination levels were observed.Small nanometer oxide clusters in the range between 10-15 nm could be observed in TEM images.Small particle size lead to a very fine and homogeneous mi-crostructures with grain sizes in the nanometer regime (100 - 400 nm).A coarser microstructure can be observed in this alloy. Nanoclus-ters formed during hot-isostatic-pressing inside the grains and on the grain boundaries.Coarser particles lead to a coarse microstructure. Grains in the small micrometer regime (2-5 µm).Fe13Cr1W0.3Ti+Fe2YSieving 90 µmHIPmechanical alloyingSize of the crystallites can be correlated with the powder particle sizes, but is an order of magni-tude smaller in size.

Basic studies on processing of a large scale ODS batch

https://publikationen.bibliothek.kit.edu/220093437/3816406

Basic studies on processing of a large scale ODS batch

Abstract

Similar works

Full text

Available Versions

KITopen