Decomposition kinetics study of zirconium hydride by interrupted thermal desorption spectroscopy

Ma, Ming; Liang, Li; Tang, Binghua; Wang, Xiang; Wang, Yuan; Cheng, Yanlin; Tan, Xiaohua

doi:10.1016/j.jallcom.2015.01.054

Cited by 26 publications

(18 citation statements)

References 21 publications

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“…Most previous [8,25] literature report that the g-ZrH is a metastable phase which has a tetragonal (P4 2 /n) structure and forms normally upon fast cooling/quenching. 1 The g-ZrH formation through normal/slow cooling has also been reported [27,28] based on neutron diffraction performed on deuterated commercial Zr-2.5 wt %Nb alloy samples.…”

Section: Introductionmentioning

confidence: 99%

In situ observation of γ-ZrH formation by X-ray diffraction

Maimaitiyili

Bjerkén

Steuwer

et al. 2017

Journal of Alloys and Compounds

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. g-ZrHSynchrotron X-ray diffraction Hydrogen charging a b s t r a c tWe report on the measurement of the formation of g-ZrH during in situ gaseous charging. The measurements were undertaken using high-energy synchrotron X-ray diffraction. Experimental observation shows that g-ZrH can form at 180 C from a mixture of aþd while dehydrogenating at slow cooling rates.The observation is further supported by ex situ laboratory X-ray diffraction on deuterated Zr powder that has undergone a similar heat-treatment cycle. The crystal structure of g-ZrH refinement agrees with the reported P4 2 /n structure found in the literature.

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Section: Introductionmentioning

confidence: 99%

In situ observation of γ-ZrH formation by X-ray diffraction

Maimaitiyili

Bjerkén

Steuwer

et al. 2017

Journal of Alloys and Compounds

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“…A lot of work has been done on the desorption behavior of Zr hydrides [7,13,[19][20][21] by experimental techniques of thermal desorption spectroscopy (TDS) [20], differential scanning calorimeter (DSC) [22], in-situ X-ray diffraction [13,23], thermogravimetric analysis (TGA) [24], and also by theoretical method based on the density functional theory (DFT) [25]. Nevertheless, the stability of various hydride phases is still debated, as such studies are working on bulk samples on the macroscopic scale.…”

Section: Introductionmentioning

confidence: 99%

Direct observation of hydrogenation and dehydrogenation of a zirconium alloy

Shen

Chen

et al. 2016

Journal of Alloys and Compounds

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The hydrogenation and dehydrogenation behaviors of a zirconium alloy were in-situ studied by scanning electron microscopy and transmission electron microscopy. The zirconium alloy can absorb hydrogen to form Zr hydride which is enhanced by the relaxation of inner stress in the alloy. The hydrogen is generated from an ion/electron beam stimulated decomposition of an organometallic precursor, trimethyl (methylcyclopentadienyl) platinum (IV), in a scanning electron microscope and focused ion beam system. The formed δ-type zirconium hydride that has a face centered cubic structure was observed to grow as preferentially oriented platelets in the zirconium alloy matrix. The platelets have a common crystallographic relationship of [010] α //[1-10] δ , (001) α //(111) δ. The dehydrogenation of the zirconium hydride was in-situ investigated in a transmission electron microscope by heating the materials. It was found that the δ-ZrH 1.5-1.66 hydride transformed into ζ-ZrH 0.25 at 450 C even at a longer heating time. The experiment demonstrates a new way for in-situ study of hydrogenation behaviors of other hydrogen storage alloys.

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“…After analyzing the curve obtained by thermal desorption spectroscopy of zirconium alloy (Figure 1a), we established that the optimal step was 100 °C corresponding to 60 A. Analysis of previous works [53][54][55][56][57][58] demonstrated that the first peak of titanium alloy hydrogen desorption is observed at 600 °C. This temperature corresponds to the phase boundary between phases δ and β + δ.…”

Section: Resultsmentioning

confidence: 84%

“…With a linear heating of 6 °C/min, the decrease in intensity of titanium hydride reflections began at 520 °C. At 530 °C, these reflections disappeared almost completely, and hydrogen desorption began Analysis of previous works [53][54][55][56][57][58] demonstrated that the first peak of titanium alloy hydrogen desorption is observed at 600 • C. This temperature corresponds to the phase boundary between phases δ and β + δ. Hence, during this TPD step, dissociation of hydrides occurs.…”

Section: Resultsmentioning

confidence: 97%

Quantitative and Qualitative Analysis of Hydrogen Accumulation in Hydrogen-Storage Materials Using Hydrogen Extraction in an Inert Atmosphere

Babikhina

Kudiiarov

Mostovshchikov

et al. 2018

Metals

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Currently, standard samples with high hydrogen concentrations that meet the requirements of hydrogen extraction in an inert atmosphere are not currently available on the market. This article describes the preparation of Ti-H standard samples and the calibration of RHEN602, a hydrogen analyzer, using LECO (LECO, Saint Joseph, MI, USA). Samples of technically pure titanium alloy were chosen as the material for sample production. The creation procedure includes five main steps: sample preparation (polishing to an average roughness of 0.04 μm using sandpaper), annealing, hydrogenation, maintenance in an inert gas atmosphere, and characterization of the samples. The absolute hydrogen concentration in the samples was determined by two methods: volumetric and mass change after the introduction of hydrogen. Furthermore, in-situ X-ray diffraction, temperature programmed desorption (TPD) analysis, and thermogravimetric analysis were used during measurements to investigate the phase transitions in the samples. As a result of this work, a series of calibration samples were prepared in a concentration range up to 4 wt % hydrogen, optimal parameters for measuring high concentrations of hydrogen. The calibration line was obtained and the calibration error was 10%.

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Decomposition kinetics study of zirconium hydride by interrupted thermal desorption spectroscopy

Cited by 26 publications

References 21 publications

In situ observation of γ-ZrH formation by X-ray diffraction

In situ observation of γ-ZrH formation by X-ray diffraction

Direct observation of hydrogenation and dehydrogenation of a zirconium alloy

Quantitative and Qualitative Analysis of Hydrogen Accumulation in Hydrogen-Storage Materials Using Hydrogen Extraction in an Inert Atmosphere

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