A5078679701- Advanced materials and composites
- Fusion materials and technologies
- Nuclear Materials and Properties
- Metal and Thin Film Mechanics
- Intermetallics and Advanced Alloy Properties
- High-Temperature Coating Behaviors
- Nuclear materials and radiation effects
- Metal Alloys Wear and Properties
- Advanced Materials Characterization Techniques
- Innovative concrete reinforcement materials
- Ion-surface interactions and analysis
- Advanced ceramic materials synthesis
- Titanium Alloys Microstructure and Properties
- Metallurgical and Alloy Processes
- Structural Behavior of Reinforced Concrete
- Structural Load-Bearing Analysis
Centro de Estudios e Investigaciones Técnicas de Gipuzkoa
2016-2020
Universidad de Navarra
2014-2020
Japan External Trade Organization
2015-2016
Universitat Politècnica de València
2003
• An ultrafine-grained W-Cr-Y alloy exhibiting Y-rich nano-precipitates was produced W-12Cr-0.5Y exhibits excellent oxidation resistance under accident-like conditions W-10Cr-2Ti2 withstands power loads of 2 MW/m without damage the bulk structure A thermal treatment at 1600°C improves thermo-shock W-10Cr-2Ti Self-passivating tungsten based alloys for first wall armour future fusion reactors are expected to provide a major safety advantage compared pure in case loss coolant accident with...
Tungsten is currently deemed as a promising plasma-facing material (PFM) for the future power plant DEMO. In case of an accident, air can get into contact with PFMs during ingress. The temperature rise up to 1200 °C due nuclear decay heat in damaged coolant supply. Heated neutron-activated tungsten forms volatile radioactive oxide which be mobilized atmosphere.
Material issues pose a significant challenge for future fusion reactors like DEMO. When using materials in environment highly integrated approach is required. Damage resilience, power exhaust, as well oxidation resistance during accidental air ingress are driving when deciding new materials. Neutron induced effects, e.g. transmutation adding to embrittlement crucial material performance. Here advanced materials, Wf/W or W/Cu, Wf/Cu composites allow the step towards reactor. Recent...
The use of self-passivating tungsten alloys for the first wall armor future fusion reactors is advantageous concerning safety issues in comparison with pure tungsten. Bulk W-10Cr-0.5Y alloy manufactured by mechanical alloying followed HIP resulted a fully dense material grain size around 100 nm and dispersion Y-rich oxide nanoparticles located at boundaries. An improvement flexural strength fracture toughness was observed respect to previous works. Oxidation tests under isothermal...
In case of an accident in the future fusion power plant like DEMO, loss-of-coolant may happen simultaneously with air ingress into vacuum vessel. The radioactive tungsten and its isotopes from first wall become oxidized vaporized environment. so-called "smart" alloys are under development to suppress mobilization tungsten. Smart aimed at adjusting their properties During regular operation, preferential sputtering alloying elements by plasma ions should leave almost pure surface facing...
The tungsten "heavy alloy" HPM 1850, a liquid-phase sintered composite material with two weight percent Ni and one Fe, as well the self-passivating alloy W-10Cr-0.5Y, high temperature oxidation resistant 10 of Cr 0.5 Y, were investigated respect to their deuterium retention. samples loaded in an electron cyclotron resonance plasma up fluence 1025m−2. retention was then by Nuclear Reaction Analysis Thermal Desorption. In 1850 observed amount similar pure tungsten, however outgassing behaviour...
Self-passivating tungsten based alloys for the first wall armor of future fusion reactors are expected to provide an important safety advantage compare pure in case a loss-of-coolant accident with simultaneous air ingress, due formation stable protective scale at high temperatures presence oxygen preventing volatile and radioactive WO3. In this work, Zr is added self-passivating W-10Cr-0.5Y alloy, manufactured by mechanical alloying HIP, view improving its strength thus, thermal shock...
Self-passivating tungsten based alloys will provide a major safety advantage compared to pure when used as first wall armor of future fusion reactors, due the formation protective oxide layer which prevents volatile and radioactive WO3 in case loss coolant accident with simultaneous air ingress. Bulk WCr10Ti2 were manufactured by two different powder metallurgical routes: (1) mechanical alloying (MA) followed hot isostatic pressing (HIP) metallic capsules, (2) MA, compaction, pressureless...
The brittle fracture strength of a self-passivating W-Cr10-Ti2 alloy (in wt.%) was measured through un-notched cantilever bending at the microscopic scale. material behaved purely elastic and fractured catastrophically in an unstable fashion. An average nominal 5.9 GPa measured. scatter shown to be significantly higher than sum all random errors indicating inherent variability material’s strength. measurements from 28 tests followed Weibull distribution with modulus m = 12. Results size...