A theoretical prediction of the thermal conductivity of uranium nitride vapor

The carbide forming is proposed to improve interfacial bonding between diamond particles and copper-matrix for diamond/copper composites. The volume fraction of diamond and minor titanium are optimized. The microstructures, thermal properties, interface reaction production and its effect of minor titanium on the properties of the composites are investigated. The results show that the bonding force and thermal conductivity of the diamond/Cu-Ti alloys composites is much weaker and lower than that of the coated-diamond/Cu. the thermal conductivity of coated-60 vol. % diamond/Cu composites is 618 W/m K which is 80 % of the theoretical prediction value. The high thermal conductivity has been achieved by forming the titanium carbide at diamond/copper interface to gain a good interface.

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A theoretical prediction of the thermal conductivity of uranium carbide vapor

Journal of Nuclear Materials ◽

10.1016/0022-3115(77)90109-x ◽

1977 ◽

Vol 67 (3) ◽

pp. 326-331 ◽

Cited By ~ 5

Author(s):

D.L. Cox ◽

A.W. Cronenberg

Keyword(s):

Thermal Conductivity ◽

Theoretical Prediction ◽

Uranium Carbide

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ON THE THEORETICAL PREDICTION OF THE EFFECTIVE THERMAL CONDUCTIVITY OF BRICKS

Proceeding of International Heat Transfer Conference 8 ◽

10.1615/ihtc8.270 ◽

1986 ◽

Cited By ~ 6

Author(s):

Fabio Gori

Keyword(s):

Thermal Conductivity ◽

Theoretical Prediction ◽

Effective Thermal Conductivity

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Thermal conductivity correlation for uranium nitride fuel between 10 and 1923 K

Journal of Nuclear Materials ◽

10.1016/0022-3115(88)90026-8 ◽

1988 ◽

Vol 151 (3) ◽

pp. 318-326 ◽

Cited By ~ 45

Author(s):

Steven B. Ross ◽

Mohamed S. El-Genk ◽

R.Bruce Matthews

Keyword(s):

Thermal Conductivity ◽

Nitride Fuel ◽

Uranium Nitride

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Study on specific heat capacity and thermal conductivity of uranium nitride

Kerntechnik ◽

10.1515/kern-2021-1010 ◽

2021 ◽

Vol 86 (6) ◽

pp. 400-403

Author(s):

M. Gokbulut ◽

G. Gursoy ◽

Ş. Aşcı ◽

E. Eser

Keyword(s):

Thermal Conductivity ◽

Heat Capacity ◽

Specific Heat ◽

Specific Heat Capacity ◽

Nuclear Material ◽

Nuclear Materials ◽

Wide Range ◽

Calculation Results ◽

Uranium Nitride ◽

Einstein Approximation

Abstract In this study, we have proposed an analytical method for calculating the specific heat capacity of uranium nitride nuclear material. The specific heat capacity results have obtained by the use of the Debye-Einstein approximation. The thermal conductivity of nuclear material has been obtained by using the experimental data of thermal diffusivity and the calculation results of specific heat capacity. This method shows that our results are satisfactory for the wide range temperature variations. The proposed approach can be easily applied to determine the thermodynamic properties of the other nuclear materials.

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Thermal conductivity of perspective fuel based on uranium nitride

Annals of Nuclear Energy ◽

10.1016/j.anucene.2014.08.011 ◽

2016 ◽

Vol 87 ◽

pp. 799-802 ◽

Cited By ~ 4

Author(s):

E.S. Solntceva ◽

M.L. Taubin ◽

V.I. Vybyvanets ◽

I.E. Galyov ◽

V.G. Baranov ◽

...

Keyword(s):

Thermal Conductivity ◽

Uranium Nitride

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Thermal Conductivity of Uranium Nitride and Carbide

International Journal of Nuclear Energy ◽

10.1155/2014/178360 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 14

Author(s):

B. Szpunar ◽

J. A. Szpunar

Keyword(s):

Thermal Conductivity ◽

Electronic Structure ◽

Alternative Fuels ◽

Magnetic Moments ◽

Quantitative Agreement ◽

Uranium Carbide ◽

Antiferromagnetic Ordering ◽

Electronic Thermal Conductivity ◽

Uranium Nitride ◽

Quantum Espresso

We investigate the electronic thermal conductivity of alternative fuels like uranium nitride and uranium carbide. We evaluate the electronic contribution to the thermal conductivity, by combining first-principles quantum-mechanical calculations with semiclassical correlations. The electronic structure of UN and UC was calculated using Quantum Espresso code. The spin polarized calculations were performed for a ferromagnetic and antiferromagnetic ordering of magnetic moments on uranium lattice and magnetic moment in UC was lower than in UN due to stronger hybridization between 2p electrons of carbon and 5f electrons of uranium. The nonmagnetic electronic structure calculations were used as an input to BolzTrap code that was used to evaluate the electronic thermal conductivity. It is predicted that the thermal conductivity should increase with the temperature increase, but to get a quantitative agreement with the experiment at higher temperatures the interaction of electrons with phonons (and electron-electron scattering) needs to be included.

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Direct Study of the Thermal Conductivity in Aluminum Nanowires

MRS Proceedings ◽

10.1557/proc-1221-cc03-03 ◽

2009 ◽

Vol 1221 ◽

Author(s):

Nenad Stojanovic ◽

D.H.S. Maithripala ◽

Jordan M. Berg ◽

Mark Holtz

Keyword(s):

Thermal Conductivity ◽

Finite Element Analysis ◽

Finite Element ◽

Electrical Resistivity ◽

Thermal Properties ◽

Electron Transport ◽

Theoretical Prediction ◽

Room Temperature ◽

Total Thermal Conductivity ◽

Element Analysis

AbstractThermal conductivity and electrical resistivity of 1 μm long aluminum nanowires, 75, 100, and 150nm in width and 100nm thick, were measured at room temperature. The method consists of microfabricated electrothermal test devices and a model-based data processing approach using finite-element analysis (FEA). The electrical and thermal properties of the nanowires differ significantly from bulk values while electrical resistivity agrees well with theoretical prediction. Electron transport equation models, which adequately describe the resistivity data, consistently underestimate the thermal conductivity. Incorporating a phonon contribution of ˜ 21 W/m·K to the total thermal conductivity is found to accurately describe the measured values.

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