The influence of irradiation by hydrogen plasma on the structure and phase compozition Ti-Zr-Ni alloys containing quasicrystalline phase

摘要

The effect of irradiation by ITER ELM-like hydrogen plasma heat load of 0.6 MJ/m² to change of morphology, structure and phase composition of Ti41,5Zr41,5Ni17 alloy is investigated. The initial state of such alloy is characterized by presence of crystal- approximant 1/1 phase (W-phase) with lattice constant аW = 1.428 ±0.0003 nm and icosahedral quasi-crystalline phase (i-phase) with quasi-crystalline parameter aq = 0.5175 ±0.0003 nm. Plasma irradiation causes creation of re-solidified layer with depth up to 50 μm and phase transformation of crystal- approximant 1/1 to quasi-crystalline phase.