Alloying effects of Ru and W on hydrogen diffusivity during hydrogen permeation through Nb-based hydrogen permeable membranes

Zhang, G.X.; Yukawa, Hiroshi; Nambu, T.; Matsumoto, Yoshihisa; Morinaga, Masahiko

doi:10.1016/j.ijhydene.2009.11.066

Cited by 26 publications

(15 citation statements)

References 17 publications

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“…Considering that the T site is the predominant location of H in both Nb and Nb 15 W, a probably reasonable explanation could be given to the abovementioned experimental observations in the literature, i.e., it is the higher DH f value which fundamentally induce the decrease of the H solubility and hydrogen embrittlement [4,10,13].…”

Section: Resultsmentioning

confidence: 83%

“…It should be noted that the selection of Nb 15 W is just to simulate to the experimental composition of Nbe5%W [3,4,10,13]. One H atom is then added, respectively, at the tetrahedral (T) and octahedral (O) sites of BCC Nb and Nb 15 W. As a typical example, Fig.…”

Section: Calculation Methodsmentioning

confidence: 99%

“…It is revealed that the addition of W could decrease the hydrogen solubility in Nb and therefore improve its resistance to hydrogen embrittlement [3,10]. In addition, the alloying of W can apparently enhance the diffusion coefficient of hydrogen in Nb and improve its hydrogen permeability [4,10,13]. The fundamental mechanism of such a decrease of hydrogen solubility as well as the increase of hydrogen diffusivity, however, has not been reported so far in the literature.…”

Section: Introductionmentioning

confidence: 98%

“…Specifically, the composition of Nb 16 H is purposely selected and one W atom is added in Nb 16 H, which is very close to the experimental composition of 5 at. % of W in NbH [3,4,10,13]. The calculated results are extensively compared with experimental observations in the literature, and are discussed in terms of electronic structures, which could provide a deep understanding of various properties of Nb 16 H and Nb 15 WH phases.…”

Section: Introductionmentioning

confidence: 98%

“…Moreover, Nb possesses a good combination of excellent hightemperature mechanical properties as well as corrosion resistance, and could be widely used as high-temperature and hydrogen-related nuclear components [6e8]. Nevertheless, the main disadvantage of Nb in these applications is its poor resistance to hydrogen embrittlement [3,4,9,10].…”

Section: Introductionmentioning

confidence: 99%

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