Effects of radiolytic tritium decay on the thermodynamic behavior of LaNi4.25Al0.75 tritides

Nobile, A.; Walters, R.T.; Mosley, W.C.

doi:10.1016/s0022-5088(06)80046-9

Cited by 26 publications

(36 citation statements)

References 7 publications

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“…The reported P-C-T isotherms [1] are in variance with our published data [2][3][4]. The authors provide a few of our references where tritium desorption isotherm data have been published for LANA0.75; these references, and more, for example, show 80°C tritium desorption P-C-T isotherms that are not aged, i.e.…”

supporting

confidence: 51%

“…Some of the data they present are absorption-desorption Pressure-Composition-Temperature (P-C-T) isotherms, the derived standard thermodynamic parameters ∆H° and ∆S°, the temperature dependent rate of tritium gas absorption and desorption for their particular LANA0.75 composition, and the trapping of 3 He upon desorption of tritium gas after seven days of tritium decay ageing.…”

mentioning

confidence: 99%

“…The authors provide a few of our references where tritium desorption isotherm data have been published for LANA0.75; these references, and more, for example, show 80°C tritium desorption P-C-T isotherms that are not aged, i.e. little time passed to allow tritium to decay to 3 He and alter the "virgin" plots after tritium absorption [4,5]. See the figure.…”

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confidence: 99%

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Comment on “Tritium absorption–desorption characteristics of LaNi4.25Al0.75”

Walters¹

2008

Journal of Alloys and Compounds

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The thermodynamic data for LaNi 4.25 Al 0.75 tritide, reported by Wang et al. (W.-d. Wang et al., J. Alloys Compd. (2006) doi:10.1016, are in variance with our published data. The plateau pressures for the P-C-T isotherms at all temperatures are significantly lower than published data. As a result, the derived thermodynamic parameters, ∆H° and ∆S°, are questionable. Using the thermodynamic parameters derived from the data reported by Wang et al. will result in under estimating the expected pressures, and therefore not provide the desired performance for storing and processing tritium.

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supporting

confidence: 51%

mentioning

confidence: 99%

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Comment on “Tritium absorption–desorption characteristics of LaNi4.25Al0.75”

Walters¹

2008

Journal of Alloys and Compounds

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“…As well, a Pd-Rh-Co alloy has shown loss of hysteresis upon tritium aging [26]. Cycling of tritium-aged La-Ni-Al alloys also results in recovery of the plateaus towards their original positions [27]. The present paper is, however, concerned with hysteresis in Pd and not in its alloys.…”

Section: Hysteresismentioning

confidence: 93%

The near elimination of hysteresis in Pd/Cr2O3 composites

Wang¹,

Flanagan²,

Balasubramaniam³

et al. 2005

Journal of Alloys and Compounds

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Although its value varies with the microstructure, hysteresis always accompanies hydride formation and decomposition in Pd(pure)-H, e.g., it is present even in nano-crystalline and thin films. Internal oxidation of Pd 0.93 Cr 0.07 alloys leads to a pure Pd matrix containing nano-crystalline chromia precipitates. The characteristic hysteresis of Pd-H almost disappears in this form of Pd. The reasons for this are discussed.

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“…The primary hydrogen isotope of interest to SRS is tritium. Tritium decay is known to induce aging affects in metal hydrides (5)(6)(7)(8)(9)(10) which are thought to arise primarily because of structural changes in the hydride caused by the deposition and migration of the 3He tritium decay product. In general the changes induced by aging (lowering of plateau pressure, increased inhomogeneity, decreased capacity) are deleterious and the desire is to avoid them if possible.…”

Section: Introductionmentioning

confidence: 99%