The use of self-passivating tungsten alloys for the first wall armor of future fusion reactors is advantageous
concerning safety issues in comparison with pure tungsten. Bulk W-10Cr-0.5Y alloy manufactured by mechanical
alloying followed by HIP resulted in a fully dense material with grain size around 100 nm and a dispersion of Y-rich
oxide nanoparticles located at the grain boundaries. An improvement in flexural strength and fracture toughness was
observed with respect to previous works. Oxidation tests under isothermal and accident-like conditions revealed a very
promising oxidation behavior for the W-10Cr-0.5Y alloy. Thermo-shock tests at JUDITH-1 to simulate ELM-like loads
resulted in a crack network at the surface with roughness values lower than those of a pure W reference material. An
additional thermal treatment at 1550 °C improves slightly the oxidation and thermo-shock resistance of the alloy
