Influence of grain size distribution on the lattice thermal conductivity of Bi2Te3-Sb2Te3-based nanostructured materials

2013 ◽  
Vol 55 (12) ◽  
pp. 2442-2449 ◽  
Author(s):  
L. P. Bulat ◽  
V. B. Osvenskii ◽  
D. A. Pshenai-Severin
Keyword(s):  
Thermal Conductivity ◽  
Grain Size ◽  
Size Distribution ◽  
Nanostructured Materials ◽  
Grain Size Distribution ◽  
Lattice Thermal Conductivity

The Influence of Microstructures on the Thermal Conductivity of Polycrystalline UO2

2016 ◽  
Author(s):  
Enze Jin ◽  
Chen Liu ◽  
Heming He
Keyword(s):  
Thermal Conductivity ◽  
Finite Element Method ◽  
Grain Size ◽  
Finite Element ◽  
Pore Size ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Structural Changes ◽  
Property Changes ◽  
Design Guidance

The thermal conductivity is one of the most important properties for UO2. The influences of microstructure are especially important for UO2 due to the severe structural changes under irradiation conditions. In this study, we have investigated the thermal conductivity of UO2 with different microstructures using Finite Element Method. The thermal conductivity increases with increasing grain size. The grain size distribution has obvious influence on the thermal conductivity especially when there are pores in the polycrystal. The influences of porosity and pore size are very sensitive to the position of the pores. The results obtained in this study are useful for prediction of property changes of UO2 fuel in pile and important to gain some design guidance to tune the properties through the control of the microstructure.

scholarly journals Characterization of Grain-Size Distribution, Thermal Conductivity, and Gas Diffusivity in Variably Saturated Binary Sand Mixtures

2018 ◽  
Vol 17 (1) ◽  
pp. 180026 ◽  
Author(s):  
T.K.K. Chamindu Deepagoda ◽  
Kathleen Smits ◽  
J.R.R.N. Jayarathne ◽  
Benjamin M. Wallen ◽  
Timothy J. Clough
Keyword(s):  
Thermal Conductivity ◽  
Grain Size ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Gas Diffusivity

Statistical Analysis of Histograms of Grain Size Distribution in Nanostructured Materials Processed by Severe Plastic Deformation

2018 ◽  
Vol 284 ◽  
pp. 431-435 ◽  
Author(s):  
Alexey V. Stolbovsky ◽  
Elena Farafontova
Keyword(s):  
Plastic Deformation ◽  
Grain Size ◽  
Statistical Analysis ◽  
Severe Plastic Deformation ◽  
Size Distribution ◽  
Nanostructured Materials ◽  
Grain Size Distribution ◽  
Grain Structure ◽  
Standard Distribution ◽  
Statistical Analysis Methods

Analysis of histograms of grain size distribution of materials nanostructured by severe plastic deformation has been carried out using statistical analysis methods. It has been established that in materials with quite homogeneous nanostructure, the fitting of histograms of grain size distribution by using a logarithmic standard distribution is not accurate enough. It is proposed to compensate for the observed imprecision by including into the model the additional component – normal distribution. It is shown that this approach is applicable to nanostructured materials with both the deformation-origin nanostructure and the grain structure formed during annealing.

Grain size distribution in evaporated permalloy films

1970 ◽  
Vol 2 (2) ◽  
pp. K69-K73 ◽  
Author(s):  
M. Reinbold ◽  
H. Hoffmann
Keyword(s):  
Grain Size ◽  
Size Distribution ◽  
Grain Size Distribution
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