Solubility and diffusivity of hydrogen and deuterium in TZM

Tominetti, S.; Caorlin, M.; Camposilvan, J.; Perujo, A.; Reiter, F.

doi:10.1016/0022-3115(90)90125-7

Cited by 16 publications

(3 citation statements)

References 12 publications

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“…Subsequently the specimens were degreased with acetone and ethanol, rinsed in distilled water and finally dried in a vacuum furnace before insertion the experimental rig. The experimental technique used for the measurement of transport parameters has been previously reported in detail [9][10][11][12]. However, we will briefly describe the experimental procedure for completeness.…”

Section: Methodsmentioning

confidence: 99%

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Study of Isotope Effects in the Hydrogen Transport of an 8% CrWVTa Martensitic Steel

Esteban¹,

Sedano²,

Perujo³

et al. 2001

phys. stat. sol. (a)

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A time-dependent gas-phase isovolumetric desorption technique has been used to assess the isotope effects in the diffusive transport parameters of hydrogen in an 8% CrWVTa reduced activation martensitic steel in the temperature range of 423-892 K and driving pressures from 4 Â 10 4 -1 Â 10 5 Pa. The experiments have been run with both protium and deuterium obtaining their respective transport parameters, diffusivity ðDÞ, Sieverts' constant ðK S Þ, permeability ðFÞ, trap site density ðh t Þ and the trapping activation energy ðE t Þ. Isotope effects on steel are analysed and compared with a-iron. A new way to derive more accurate tritium transport parameters is proposed.

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Section: Methodsmentioning

confidence: 99%

“…The theoretical expression for the pressure increase in the experimental chamber PðtÞ, developed previously [9][10][11][12] when solving Fick's second law [13] is the following:…”

Section: Theorymentioning

confidence: 99%

Study of Isotope Effects in the Hydrogen Transport of an 8% CrWVTa Martensitic Steel

Esteban¹,

Sedano²,

Perujo³

et al. 2001

phys. stat. sol. (a)

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“…Under basic ammonothermal conditions in Ni-Cr superalloy autoclaves, significant pressure drops are observed, presumably due to diffusional hydrogen loss. [13,38] The permeability of hydrogen through TZM (~2×10 -12 [40][41] mol m -1 s -1 Pa -1/2 ) is lower than through Ni-Cr superalloys (~7×10 -11 mol m -conditions [37] (using an average temperature based on the initial pressure before significant decomposition occurred). The observed peak pressures are considerably below this value, suggesting negligible decomposition, and the lack of pressure decay suggests minimal hydrogen formation.…”

Section: Autoclave Behaviormentioning

confidence: 99%

Acidic ammonothermal growth of gallium nitride in a liner-free molybdenum alloy autoclave

Malkowski

Pimputkar

Speck

et al. 2016

Journal of Crystal Growth

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This paper discusses promising materials for use as internal, non-load bearing components as well as molybdenum-based alloys for autoclave structural components for an ammonothermal autoclave. An autoclave was constructed from the commercial titanium-zirconium-molybdenum (TZM) alloy and was found to be chemically inert and mechanically stable under acidic ammonothermal conditions. Preliminary seeded growth of GaN was demonstrated with negligible incorporation of transition metals (including molybdenum) into the grown material (<10 17 cm-3). Molybdenum and TZM were exposed to a basic ammonothermal environment, leading to slight degradation through formation of molybdenum nitride powders on their surface at elevated temperatures (T > 560°C). The possibility of a 'universal', inexpensive, liner-free ammonothermal autoclave capable of exposure to basic and acidic chemistry is demonstrated.

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The Modulated Permeation Technique Used at the Open University

Braithwaite

2000

Hydrogen Recycling at Plasma Facing Materials

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Solubility and diffusivity of hydrogen and deuterium in TZM

Cited by 16 publications

References 12 publications

Study of Isotope Effects in the Hydrogen Transport of an 8% CrWVTa Martensitic Steel

Study of Isotope Effects in the Hydrogen Transport of an 8% CrWVTa Martensitic Steel

Acidic ammonothermal growth of gallium nitride in a liner-free molybdenum alloy autoclave

The Modulated Permeation Technique Used at the Open University

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