Formation of Pu amorphous alloys or metastable structures in Pu-Fe, Pu-Ta, and Pu-Si alloys

Rizzo, H F; Echeverria, A W

Title: Formation of Pu amorphous alloys or metastable structures in Pu-Fe, Pu-Ta, and Pu-Si alloys

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Abstract

Sputter deposition technique was used to study the possible formation of amorphous structures in Pu-Fe, Pu-Ta, and Pu-Si systems. A triode sputtering system was used to prepare sputtered coatings: 13 to 59 at. % (a/o) Fe, 10 to 50 a/o Si, and 15 to 65 a/o Ta. Structure of the coatings was determined by x-ray diffraction techniques. The temperature stability of the obtained structures was determined by Differential Scanning Calorimetry (DSC) measurements. The Pu-Fe and Pu-Si binary systems showed strong evidence for the formation of amorphous phases in the sputtered coatings. X-ray analyses indicated the presence of Pu6Fe in the 13 to 20 a/o Fe range of Pu-Fe alloys and no apparent crystalline phases over the entire 10 to 50 a/o Si range of Pu-Si alloys. In the Pu-Ta system, the DSC data obtained for compositions below 50 a/o Ta did not show typical crystallization exotherms. At compositions above 50 a/o Ta, a metastable bcc alpha Ta structure was observed with an expanded lattice parameter. The calculated volume expansion (2.9%) corresponds to 29 a/o of Pu in solid solution if the lattice parameter is assumed to follow Vegards Law. After storage in a nitrogen glovebox atmosphere for over two years,more »« less

Authors:: Rizzo, H F; Echeverria, A W

Publication Date:: Tue Aug 20 00:00:00 EDT 1985

Research Org.:: Lawrence Livermore National Lab., CA (USA)

OSTI Identifier:: 6129914

Report Number(s):: UCRL-92693; CONF-8509147-14
ON: DE86005809

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Conference

Resource Relation:: Conference: ACTINIDES '85, Aix-en-Provence, France, 1 Sep 1985

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; IRON ALLOYS; DEPOSITION; SPUTTERING; PLUTONIUM ALLOYS; SILICON ALLOYS; TANTALUM ALLOYS; AMORPHOUS STATE; X-RAY DIFFRACTION; ACTINIDE ALLOYS; ALLOYS; COHERENT SCATTERING; DIFFRACTION; SCATTERING; 360101* - Metals & Alloys- Preparation & Fabrication

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                    Rizzo, H F, and Echeverria, A W. Formation of Pu amorphous alloys or metastable structures in Pu-Fe, Pu-Ta, and Pu-Si alloys.  United States: N. p., 1985. 
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                    Rizzo, H F, & Echeverria, A W. Formation of Pu amorphous alloys or metastable structures in Pu-Fe, Pu-Ta, and Pu-Si alloys.  United States.

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                    Rizzo, H F, and Echeverria, A W. 1985.  
        "Formation of Pu amorphous alloys or metastable structures in Pu-Fe, Pu-Ta, and Pu-Si alloys".  United States.  https://www.osti.gov/servlets/purl/6129914.

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@article{osti_6129914,

  title        = {Formation of Pu amorphous alloys or metastable structures in Pu-Fe, Pu-Ta, and Pu-Si alloys},

  author       = {Rizzo, H F and Echeverria, A W},

  abstractNote = {Sputter deposition technique was used to study the possible formation of amorphous structures in Pu-Fe, Pu-Ta, and Pu-Si systems. A triode sputtering system was used to prepare sputtered coatings: 13 to 59 at. % (a/o) Fe, 10 to 50 a/o Si, and 15 to 65 a/o Ta. Structure of the coatings was determined by x-ray diffraction techniques. The temperature stability of the obtained structures was determined by Differential Scanning Calorimetry (DSC) measurements. The Pu-Fe and Pu-Si binary systems showed strong evidence for the formation of amorphous phases in the sputtered coatings. X-ray analyses indicated the presence of Pu6Fe in the 13 to 20 a/o Fe range of Pu-Fe alloys and no apparent crystalline phases over the entire 10 to 50 a/o Si range of Pu-Si alloys. In the Pu-Ta system, the DSC data obtained for compositions below 50 a/o Ta did not show typical crystallization exotherms. At compositions above 50 a/o Ta, a metastable bcc alpha Ta structure was observed with an expanded lattice parameter. The calculated volume expansion (2.9%) corresponds to 29 a/o of Pu in solid solution if the lattice parameter is assumed to follow Vegards Law. After storage in a nitrogen glovebox atmosphere for over two years, the Pu-Si and Pu-Ta coatings have maintained a metallic luster and have shown no visible evidence of surface oxidation.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/6129914},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Aug 20 00:00:00 EDT 1985},

  month        = {Tue Aug 20 00:00:00 EDT 1985}

}

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