Isotope dependence of the effective valence of protium and deuterium in the α phase of tantalum

K. Hashizume; Y. Kawabata; K. Fujii; M. Sugisaki

doi:10.1016/0925-8388(94)90820-6

Isotope dependence of the effective valence of protium and deuterium in the α phase of tantalum

K. Hashizume, Y. Kawabata, K. Fujii, M. Sugisaki

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The effective valence Z^* of protium and deuterium in the α phase of Ta has been measured by means of a stationary state electromigration experiment in the temperature region from 373 K to 523 K. A definite isotope dependence Z*(H) >Z^*(D) has been found. The reversal of the isotope dependence to Z^*(H) < Z^*(D) in the temperature region below 350 K has been suggested from the temperature dependence of Z^*. The direct valence Z_d of H and D has been evaluated by relating the temperature dependence of Z^* to that of electric resistivity, leading to the values 1.7 and 0.91 respectively. We also found that the contribution of the wind valence Z_w is negative and depends on the isotopes.

Original language	English
Pages (from-to)	71-76
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	215
Issue number	1-2
DOIs	https://doi.org/10.1016/0925-8388(94)90820-6
Publication status	Published - Nov 1994

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Isotope dependence of the effective valence of protium and deuterium in the α phase of tantalum",

abstract = "The effective valence Z* of protium and deuterium in the α phase of Ta has been measured by means of a stationary state electromigration experiment in the temperature region from 373 K to 523 K. A definite isotope dependence Z*(H) >Z*(D) has been found. The reversal of the isotope dependence to Z*(H) < Z*(D) in the temperature region below 350 K has been suggested from the temperature dependence of Z*. The direct valence Zd of H and D has been evaluated by relating the temperature dependence of Z* to that of electric resistivity, leading to the values 1.7 and 0.91 respectively. We also found that the contribution of the wind valence Zw is negative and depends on the isotopes.",

author = "K. Hashizume and Y. Kawabata and K. Fujii and M. Sugisaki",

year = "1994",

month = nov,

doi = "10.1016/0925-8388(94)90820-6",

language = "English",

volume = "215",

pages = "71--76",

journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Isotope dependence of the effective valence of protium and deuterium in the α phase of tantalum

AU - Hashizume, K.

AU - Kawabata, Y.

AU - Fujii, K.

AU - Sugisaki, M.

PY - 1994/11

Y1 - 1994/11

N2 - The effective valence Z* of protium and deuterium in the α phase of Ta has been measured by means of a stationary state electromigration experiment in the temperature region from 373 K to 523 K. A definite isotope dependence Z*(H) >Z*(D) has been found. The reversal of the isotope dependence to Z*(H) < Z*(D) in the temperature region below 350 K has been suggested from the temperature dependence of Z*. The direct valence Zd of H and D has been evaluated by relating the temperature dependence of Z* to that of electric resistivity, leading to the values 1.7 and 0.91 respectively. We also found that the contribution of the wind valence Zw is negative and depends on the isotopes.

AB - The effective valence Z* of protium and deuterium in the α phase of Ta has been measured by means of a stationary state electromigration experiment in the temperature region from 373 K to 523 K. A definite isotope dependence Z*(H) >Z*(D) has been found. The reversal of the isotope dependence to Z*(H) < Z*(D) in the temperature region below 350 K has been suggested from the temperature dependence of Z*. The direct valence Zd of H and D has been evaluated by relating the temperature dependence of Z* to that of electric resistivity, leading to the values 1.7 and 0.91 respectively. We also found that the contribution of the wind valence Zw is negative and depends on the isotopes.

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U2 - 10.1016/0925-8388(94)90820-6

DO - 10.1016/0925-8388(94)90820-6

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JO - Journal of Alloys and Compounds

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