Kinetics and morphology of the reverse β→α hydride transformation in thermodynamically open Pd-H system
In: Proceedings of the International Symposium on Metal-Hydrogen Systems - Fundamentals and Applications, Hangzhou, China, October 4-9, 1998Journal of alloys and compounds 293-95:379-384; Jg. 293-95 (1999) S. 379-384
Online
Konferenz
- print, 10 ref
The kinetics of degassing and reverse β→α hydride transformation initiated in the unstrengthened β-hydride of Pd in the thermodynamically open Pd-H system is studied. An isothermal kinetic diagram was constructed and its shape was similar to those of transformations in steel during heating. With optical microscopy in situ and video-registration methods the morphology of new α-phase precipitations is studied. It is shown that the process of α-phase generation in subsurface layers depends on the orientation of the grain crystal lattice to the surface. α-Phase nuclei grow in borders of the grain in which they were generated. It is shown that hydrogen macro-stresses may be generated throughout the whole volume of the β-hydride sample and they relax by means of grain borders appearance (mutual grains displacement). During the process of β→α transformation local internal hydrogen stresses may slow down both degassing and β→α transformation.
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Kinetics and morphology of the reverse β→α hydride transformation in thermodynamically open Pd-H system
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Autor/in / Beteiligte Person: | GOLTSOVA, M. V ; ARTEMENKO, Yu. A ; ZAITSEV, V. I |
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Quelle: | Proceedings of the International Symposium on Metal-Hydrogen Systems - Fundamentals and Applications, Hangzhou, China, October 4-9, 1998Journal of alloys and compounds 293-95:379-384; Jg. 293-95 (1999) S. 379-384 |
Veröffentlichung: | Lausanne: Elsevier, 1999 |
Medientyp: | Konferenz |
Umfang: | print, 10 ref |
ISSN: | 0925-8388 (print) |
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