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Polycrystalline gamma-plutonium’s elastic moduli versus temperature
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10.1121/1.3271036
/content/asa/journal/jasa/127/2/10.1121/1.3271036
http://aip.metastore.ingenta.com/content/asa/journal/jasa/127/2/10.1121/1.3271036

Figures

Image of FIG. 1.
FIG. 1.

Crystal structure of , viewed perspectively along [110], with origin chosen as [000]. Cell shows Fddd-space-group (centrosymmetric, no. 70) and contains eight atoms with identical Wyckoff symmetry. At ambient pressure, no other metallic element shows this space group, a space group that occurs in many compounds.

Image of FIG. 2.
FIG. 2.

Part of the resonance frequency spectrum of polycrystalline Pu shown near the low- and high-temperature ends of the -phase region of existence. The dashed line provides a guide to the eye to emphasize the size of the shift of the resonances with temperature.

Image of FIG. 3.
FIG. 3.

Resonance frequencies versus temperature. All frequencies show a smooth linear decrease with increasing temperature. These fitted values were used in the computation routine to determine the elastic moduli.

Image of FIG. 4.
FIG. 4.

RMS error of longitudinal elastic modulus and Chi-square error of shear and longitudinal elastic moduli versus moduli to test for fitting and isotropy errors. Note: RMS error has the same value for shear and longitudinal moduli.

Image of FIG. 5.
FIG. 5.

Temperature dependence of bulk , shear , and longitudinal elastic moduli of .

Image of FIG. 6.
FIG. 6.

Elastic moduli versus temperature of , , and Ga.

Image of FIG. 7.
FIG. 7.

Temperature variation of Poisson’s ratio for . The line is a fit of Poisson’s ratio versus temperature. The parameters of the fit are given in the figure.

Image of FIG. 8.
FIG. 8.

Poisson’s ratio versus temperature of aluminum: , , Ga, and Ga.

Tables

Generic image for table
TABLE I.

Parameters of the linear fits to the measurements of , , and of the form .

Generic image for table
TABLE II.

Parameters of the temperature fit for two elastic moduli of and a comparison with those for and Ga-stabilized for the temperature ranges indicated.

Generic image for table
TABLE III.

Logarithmic temperature derivatives for the elastic moduli of and a comparison with those for and Ga-stabilized for the temperature ranges indicated.

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/content/asa/journal/jasa/127/2/10.1121/1.3271036
2010-02-05
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Polycrystalline gamma-plutonium’s elastic moduli versus temperature
http://aip.metastore.ingenta.com/content/asa/journal/jasa/127/2/10.1121/1.3271036
10.1121/1.3271036
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