Analysis of grain boundary effect of bulk polycrystalline materials through nanomechanical characterization

2008 ◽  
Vol 41 (7) ◽  
pp. 074015 ◽  
Author(s):  
T Ohmura ◽  
K Tsuzaki
Keyword(s):  
Grain Boundary ◽  
Boundary Effect ◽  
Polycrystalline Materials ◽  
Grain Boundary Effect

Area-Perimeter Relation of the Grains in Stabilized Cubic Zirconia

2007 ◽  
Vol 336-338 ◽  
pp. 2524-2527
Author(s):  
Yun Wan ◽  
Jiang Hong Gong ◽  
Ying Li
Keyword(s):  
Grain Boundary ◽  
Grain Shape ◽  
Regular Polygon ◽  
Boundary Effect ◽  
Holding Time ◽  
Potential Parameter ◽  
Polycrystalline Materials ◽  
Square Root ◽  
Cubic Zirconia ◽  
Grain Boundary Effect

Based on the observation that the ratio of the perimeter, P, to the square root of the area, A0.5, of the grains for a given material is nearly constant, it is suggested that the grain shape may be treated as a regular polygon with a non-integral side number. Examining the variation of P/A0.5-ratio with sintering holding time may provide useful information for sintering dynamics. Further analysis suggests that the P/A0.5-ratio may be a potential parameter for studying the grain-boundary effect in polycrystalline materials.

Grain boundary effect on the β-boron electrical transport properties at high pressure

2010 ◽  
Vol 97 (17) ◽  
pp. 174101 ◽  
Author(s):  
Ming Li ◽  
Jie Yang ◽  
Karim Snoussi ◽  
Lixin Li ◽  
Huixin Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Grain Boundary ◽  
Transport Properties ◽  
Electrical Transport ◽  
Boundary Effect ◽  
Electrical Transport Properties ◽  
Grain Boundary Effect

Grain boundary effects in NTC-PTC composite thermistor materials

1999 ◽  
Vol 14 (1) ◽  
pp. 120-123 ◽  
Author(s):  
D. J. Wang ◽  
J. Qiu ◽  
Y. C. Guo ◽  
Z. L. Gui ◽  
L. T. Li
Keyword(s):  
Energy Level ◽  
Grain Boundary ◽  
Boundary Effect ◽  
Complex Impedance ◽  
Negative Temperature ◽  
Impedance Analysis ◽  
Composite Effect ◽  
Complex Impedance Analysis ◽  
Temperature Coefficient Of Resistivity ◽  
Grain Boundary Effect

Yttrium-doped (Sr0.45Pb0.55)TiO3 ceramics have been studied by complex impedance analysis. As a sort of NTC-PTC composite thermistor, it exhibited a significantly large negative temperature coefficient of resistivity below Tc in addition to the ordinary PTC characteristics above Tc. It is found that the NTC effect in NTC-PTC materials was not originated from the deep energy level of donor (bulk behavior), but from the electrical behavior of the grain boundary. Therefore, the NTC-PTC composite effect was assumed to be a grain boundary effect, and yttrium was a donor at shallow energy level. The NTC-PTC ceramics were grain boundary controlled materials.

scholarly journals Grain Boundary Effect on Diffusion of Hydrogen in Pure Aluminum

1991 ◽  
Vol 32 (12) ◽  
pp. 1109-1114 ◽  
Author(s):  
Minoru Ichimura ◽  
Yasushi Sasajima ◽  
Mamoru Imabayashi
Keyword(s):  
Grain Boundary ◽  
Boundary Effect ◽  
Pure Aluminum ◽  
Diffusion Of Hydrogen ◽  
Grain Boundary Effect

Grain-boundary effect in zirconia stabilized with yttria and calcia by electrical measurements

2003 ◽  
Vol 103 (2) ◽  
pp. 108-114 ◽  
Author(s):  
Ying Li ◽  
Mingshuai Liu ◽  
Jianghong Gong ◽  
Yunfa Chen ◽  
Zilong Tang ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Boundary Effect ◽  
Electrical Measurements ◽  
Grain Boundary Effect
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