Point-detect production and migration in plutonium metal at ambient conditions

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Description

Modeling thermodynamics and defect production in plutonium (Pu) metal and its alloys, has proven to be singularly difficult. The multiplicity of phases and the small changes in temperature, pressure, and/or stress that can induce phase changes lie at the heart of this difficulty, In terms of radiation damage, Pu metal represents a unique situation because of the large volume changes that accompany the phase changes. The most workable form of the metal is the fcc (6.) phase, which in practice the 6 phase is stabilized by addition of alloying elements such as Ga or AI. The thermodynamically stable phase at ... continued below

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3 p.

Creation Information

Baskes, M. I. (Michael I.); Stan, M. (Marius); Sickafus, K. (Kurt E.) & Valone, S. M. (Steven M.) January 1, 2001.

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Description

Modeling thermodynamics and defect production in plutonium (Pu) metal and its alloys, has proven to be singularly difficult. The multiplicity of phases and the small changes in temperature, pressure, and/or stress that can induce phase changes lie at the heart of this difficulty, In terms of radiation damage, Pu metal represents a unique situation because of the large volume changes that accompany the phase changes. The most workable form of the metal is the fcc (6.) phase, which in practice the 6 phase is stabilized by addition of alloying elements such as Ga or AI. The thermodynamically stable phase at ambient conditions is the between monoclinic (a-) phase, which, however, is approximately 20 % lower in volume than the 6 phase. In stabilized Pu metal, there is an interplay between the natural swelling tendencies of fcc metals and the volume-contraction tendency of the underlying phase transformation to the thermodynamically stable phase. This study explores the point defect production and migration properties that are necessary to eventually model the long-term outcome of this interplay.

Physical Description

3 p.

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  • "Submitted to: Fourth Pacific Rim International Conference on Advanced Materials and Processing, Dec. 11-15, 2001, Honolulu, Hawaii"

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  • Report No.: LA-UR-01-4850
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975713
  • Archival Resource Key: ark:/67531/metadc928532

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Creation Date

  • January 1, 2001

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 6:53 p.m.

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Baskes, M. I. (Michael I.); Stan, M. (Marius); Sickafus, K. (Kurt E.) & Valone, S. M. (Steven M.). Point-detect production and migration in plutonium metal at ambient conditions, article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc928532/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.