EELS characterization of zirconium hydrides

Abstract

Abstract. 2014 The energy of the first plasmon loss peak has been determined for the ~-Zr hydride phase in pure Zr. The peak energy is sufficiently different from that of the 03B4-hydride to permit EELS "fingerprinting" with ease using a parallel EELS system, but with greater difficulty using serial EELS, because of drift associated with the slower collection rates. Experiments on Zr-2.5Nb alloys showed that the hydride phases can also be distinguished using EELS, facilitating the analysis of hydride precipitates and blisters in nuclear reactor pressure tubes.

Collective electronic excitations in Ti and Zr and their dihydrides

“…Our calculated plasmon value of 19.4 eV in ZrH 2 is only slightly lower than in TiH 2 , which is in contrast to the significantly lower plasmon value derived in the FEG model determined by the average valence density in this compound. On the other hand, as seen in Table IV, we find rather good agreement between our calculated value of the plasmon energy in ZrH 2 with the 19 and 19.6 eV values measured experimentally [88,92].…”

Evolution of the Hydride Structure in Irradiated E110 Alloy in the Process of Thermomechanical Treatment Simulating Supercritical Dry Storage Conditions

“…Анализ фазового состава и дислокационной структуры проводился с использова нием методов просвечивающей (FEI Titan 80 300) и растровой (Zeiss Merlin) электрон ной микроскопии (ПЭМ и СЭМ) и подробно описан в работах [11,12]. Определение ти пов гидридов циркония проводилось по спектрам энергетических потерь электронов путем определения положения пика плазмонных потерь [13], а также методом дифрак ции обратно рассеянных электронов (EBSD -Electron Backscatter Diffraction). Подроб но методика определения типа гидридов описана в работе [9].…”

Subnanometer Scale Mapping of Hydrogen Doping in Vanadium Dioxide

“…The core electron from the isolated hydrogen atom becomes a valence electron once incorporated into a solid, removing the ionization edge . Therefore, the acquisition of the EELS signature of hydrogen requires an indirect approach by collecting its effect on the neighboring atoms. − Despite the recent achievements of TEM-based characterization, the reported results lack either chemical sensitivity or a direct link with hydrogen content. Other techniques such as X-ray absorption spectroscopy (XAS), ,, dynamic secondary ion mass spectrometry (D-SIMS), or nuclear reaction analysis (NRA) are usually required to reliably characterize the effect of doping.…”