Journal Article

PreJuSER-20893

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png SANS evidence for the dispersion of nanoparticles in W-1Y203 and W-1La203 processed by hot isoastatic pressing

Munoz, A. ; Martinez, J. ; Monge, M. A. ; Savoini, B. ; Pareja, R. ; Radulescu, A.FZJ*

2012
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.ijrmhm.2012.01.010

Abstract: The development of a dispersion of nanoparticles in the W-1%Y2O3 and W-1%La2O3 (wt%) alloys processed by hot isostatic pressing have been investigated using small-angle neutron scattering. The analyses of the scattering data using the Beaucage unified approach reveal the presence of a bi-modal distribution of spherical scattering centers with sizes of less of 180 nm in these alloys. The mode values of these centers are found at similar to 10 and 40 nm in W-1%Y2O3, and at similar to 15 and 80 nm in W-1%La2O3. The scanning electron microscopy analyses showed the presence of small second phase particles. The contribution of the pore space to the scattering curves has been analyzed using the results obtained for pure W processed following the same procedure used for the alloys, and the porosity measurements of the samples. (C) 2012 Elsevier Ltd. All rights reserved.

Keyword(s): Engineering, Industrial Materials and Processing (1st) ; Key Technologies (1st) ; Condensed Matter Physics (2nd) ; J ; ODS tungsten alloys (auto) ; Refractory metals (auto) ; SANS (auto) ; HIP (auto)

Note: The present work was supported by the Consejeria de Educacion de la Comunidad de Madrid, through the program ESTRUMAT-CM S2009MAT-1585 and by the Ministerio de Innovacion y Ciencia (project ENE2008-06403-C06-04). The additional financial support from EURATOM/CIEMAT association through contract EFDA WP11-MAT-WWALLOY is also acknowledged. The authors thank the Microscopy Laboratory of CENIM-CSIC for the high resolution SEM measurements.

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Contributing Institute(s):

1. Neutronenstreuung (ICS-1)
2. JCNS-FRM-II (JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II)
3. Neutronenstreuung (JCNS-1)

Research Program(s):

1. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (FUEK505) (FUEK505)
2. 544 - In-house Research with PNI (POF2-544) (POF2-544)

Experiment(s):

1. KWS-1: Small angle scattering diffractometer (NL3b)
2. KWS-2: Small angle scattering diffractometer (NL3ao)

Appears in the scientific report 2012

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Database coverage:
; BIOSIS Previews ; Current Contents - Physical, Chemical and Earth Sciences ; JCR ; SCOPUS ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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