RT Journal Article
T1 On the thermal stability of the nanostructured tungsten coatings
A1 Gómes de Castro, Consuelo
A1 Río Esteban, Francisco Javier Del
A1 Gordillo García, Nuria
A1 Tejado Garrido, Elena María
A1 Pastor Caño, Jose Ygnacio
A1 Balabanian, G.
A1 Pani Laiz, Miguel
A1 Gozález Arrabal, Raquel
A1 Perlado Martín, José Manuel
AB Tungsten is a candidate to be used as plasma facing materials in future fusion nuclear reactors. There, the material has to withstand large radiation fluxes and thermal loads. Nowadays, nanostructured tungsten (NW) seems to exhibit a better radiation-resistance than the coarse grained. However, the thermal stability of NW is still an open question. On these bases, the thermal stability of NW coatings is studied in the temperature range from 1000 to 1473 K. For this purpose, Samples were isothermally annealed in vacuum at temperatures from 298 to 1473 K. The morphological and microstructural properties of the samples were characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM) and X-Ray diffraction (XRD), respectively. For T<1000 K nanostructured are preserved and only a small reduction in the internal stress of the films is observed. For T > 100 K, nanostructures start to grow in a bimodal fashion with activation energy of 0259 eV, reaching a submicron-sized threshold at T approximate to 1473 K.
PB Elsevier Science
SN 0257-8972
YR 2017
FD 2017-09-25
LK https://hdl.handle.net/20.500.14352/18692
UL https://hdl.handle.net/20.500.14352/18692
LA eng
NO ©2017 Elsevier ScienceAuthors would like to thank the Centro de Apoyo a la InvestigaciOn (CAI) from the Excellence Moncloa-Campus placed at Madrid-Spain for the thermo-diffraction measurements and the AFM images. C.G.C, J.R and N.G gratefully acknowledges many fruitful discussions with Dr. Jose Antonio Jimenez from CENIM-CSIC about thermo-diffraction measurements and analysis. Research by NG is supported by MINECO (Spain) under project JdCI-2012-12652.This research was supported by Comunidad de Madrid (S2013/MIT-2862-MULTIMATCHALLENGE), Ministerio de Economia y Competitividad of Spain (MAT2015-70780C4-4-P, ENE2015-70300-C3-3-R (Radiafus-4)).
NO Ministerio de Economia y Competitividad (MINECO)
NO Comunidad de Madrid
DS Docta Complutense
RD 11 may 2025