Densification strain rate in sintering of Tho2 and ThO2-0.25% Nb2O5 pellets

The densification behavior of ThO2 and ThO2 containing 0.25%Nb2O5 powder compacts was studied with the help of a high temperature push-rod type dilatometer. From the temperature versus density plots, densification strain rate, (1/?)(d?/dt), were calculated. It was observed that the addition of Nb2O5 to ThO2 has caused a drastic increase in densification strain rate in the density range of 76 to 82% of T.D. A five-fold increase in the values of strain rate for ThO2-0.25%Nb2O5 in comparison to pure ThO2 was observed in the temperature range of 1300 to 1350oC. The decrease in the densification strain rate for ThO2- 0.25% Nb2O5 (composition in wt%) at high densities may be attributed to the grain size effect.

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Grain size effect on the high-temperature hydrothermal stability of Cu/SAPO-34 catalysts for NH3-SCR

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2020.104559 ◽

2020 ◽

Vol 8 (6) ◽

pp. 104559

Author(s):

Haidi Xu ◽

Chenlu Lin ◽

Qingjin Lin ◽

Xi Feng ◽

Zhifeng Zhang ◽

...

Keyword(s):

Grain Size ◽

High Temperature ◽

Size Effect ◽

Hydrothermal Stability ◽

Grain Size Effect ◽

Nh3 Scr

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Grain size effect on the martensitic transformation of Ni50Mn25Ga17Cu8 high-temperature shape memory alloy

Intermetallics ◽

10.1016/j.intermet.2015.02.016 ◽

2015 ◽

Vol 61 ◽

pp. 42-46 ◽

Cited By ~ 5

Author(s):

Jingmin Wang ◽

Yongjun Han ◽

Hui Hua ◽

Xiao Wang ◽

Chengbao Jiang

Keyword(s):

Grain Size ◽

High Temperature ◽

Martensitic Transformation ◽

Shape Memory Alloy ◽

Size Effect ◽

Shape Memory ◽

Grain Size Effect

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Investigation on grain size effect in high strain rate ductility of 1100 pure aluminum

10.1063/1.4971666 ◽

2017 ◽

Cited By ~ 1

Author(s):

N. Bonora ◽

N. Bourne ◽

A. Ruggiero ◽

G. Iannitti ◽

G. Testa

Keyword(s):

Grain Size ◽

Size Effect ◽

High Strain Rate ◽

Strain Rate ◽

High Strain ◽

Pure Aluminum ◽

Grain Size Effect

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Grain Size and the Compressive Strength of Ice

Journal of Energy Resources Technology ◽

10.1115/1.3231203 ◽

1985 ◽

Vol 107 (3) ◽

pp. 369-374 ◽

Cited By ~ 12

Author(s):

D. M. Cole

Keyword(s):

Grain Size ◽

Size Effect ◽

Strain Rate ◽

Peak Stress ◽

Applied Strain ◽

Test Material ◽

Strain Rates ◽

Grain Size Effect ◽

Compression Tests ◽

Polycrystalline Ice

This work presents the results of uniaxial compression tests on freshwater polycrystalline ice. Grain size of the test material ranged from 1.5 to 5 mm, strain rate ranged from 10−6 to 10−2 s−1 and the temperature was −5°C. The grain size effect emerged clearly as the strain rate increased to 10−5 s−1 and persisted to the highest applied strain rates. On average, the stated increase in grain size brought about a decrease in peak stress of approximately 31 percent. The occurrence of the grain size effect coincided with the onset of visible cracking. The strength of the material increased to a maximum at a strain rate of 10−3 s−1, and then dropped somewhat as the strain rate increased further to 10−2 s−1. Strain at peak stress generally tended to decrease with both increasing grain size and increasing strain rate. The results are discussed in terms of the deformational mechanisms which lead to the observed behavior.

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