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Memorias de investigación
Research Publications in journals:
Manufacturing of self-passivating tungsten based alloys by different powder metallurgical routes
Year:2016
Research Areas
  • Engineering
Information
Abstract
Self-passivating tungsten based alloys will provide a major safety advantage compared to pure tungsten when used as first wall armor of future fusion reactors, due to the formation of a protective oxide layer which prevents the formation of volatile and radioactive WO3 in case of a loss of coolant accident with simultaneous air ingress. Bulk WCr10Ti2 alloys were manufactured by two different powder metallurgical routes: (1) mechanical alloying (MA) followed by hot isostatic pressing (HIP) of metallic capsules, and (2) MA, compaction, pressureless sintering in H2 and subsequent HIPing without encapsulation. Both routes resulted in fully dense materials with homogeneous microstructure and grain sizes of 300 nm and 1 ?m, respectively. The content of impurities remained unchanged after HIP, but it increased after sintering due to binder residue. It was not possible to produce large samples by route (2) due to difficulties in the uniaxial compaction stage. Flexural strength and fracture toughness measured on samples produced by route (1) revealed a ductile-to-brittle-transition temperature (DBTT) of about 950 °C. The strength increased from room temperature to 800 °C, decreasing significantly in the plastic region. An increase of fracture toughness is observed around the DBTT.
International
Si
JCR
No
Title
Physica Scripta
ISBN
0031-8949
Impact factor JCR
1,194
Impact info
2015 Impact Factor
Volume
2016
10.1088/0031-8949/T167/1/014041
Journal number
T167
From page
1
To page
6
Month
ENERO
Ranking
Participants
  • Autor: A. Calvo (CEIT and TECNUN (University of Navarra), E-20018 San Sebastian, Spain)
  • Autor: N. Ordás (CEIT and TECNUN (University of Navarra), E-20018 San Sebastian, Spain)
  • Autor: I. Iturriza (CEIT and TECNUN (University of Navarra), E-20018 San Sebastian, Spain)
  • Autor: Jose Ignacio Pastor Caño (UPM)
  • Autor: Elena Maria Tejado Garrido (UPM)
  • Autor: Teresa Palacios Garcia (UPM)
  • Autor: C. García-Rosales (CEIT and TECNUN (University of Navarra), E-20018 San Sebastian, Spain)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Ciencia de Materiales
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