Outstanding radiation resistance of tungsten-based high-entropy alloys

Citations Over TimeTop 1% of 2019 papers

Abstract

A body-centered cubic W-based refractory high entropy alloy with outstanding radiation resistance has been developed. The alloy was grown as thin films showing a bimodal grain size distribution in the nanocrystalline and ultrafine regimes and a unique 4-nm lamella-like structure revealed by atom probe tomography (APT). Transmission electron microscopy (TEM) and x-ray diffraction show certain black spots appearing after thermal annealing at elevated temperatures. TEM and APT analysis correlated the black spots with second-phase particles rich in Cr and V. No sign of irradiation-created dislocation loops, even after 8 dpa, was observed. Furthermore, nanomechanical testing shows a large hardness of 14 GPa in the as-deposited samples, with near negligible irradiation hardening. Theoretical modeling combining ab initio and Monte Carlo techniques predicts the formation of Cr- and V-rich second-phase particles and points at equal mobilities of point defects as the origin of the exceptional radiation tolerance.

Related Papers

• → Μicro-structured tungsten: an advanced plasma-facing material(2019)25 cited
• → Tungsten and molybdenum co-precipitation by α-benzoinoxime for activation analysis of tungsten(1976)9 cited
• → Investigate on thermal tensile of Mg-3Gd-0.5Zn alloys containing LPSO phase(2024)2 cited
• → A preliminary study of production of tungsten-rhenium alloys in N-Reactor(1963)
• → DETERMINING QUALITY REQUIREMENTS AT THE UNIVERSITIES TO IMPROVE THE QUALITY OF EDUCATION(2018)