scholarly journals Grain boundary transport and related processes in natural fine grained aggregates

1992 ◽  
Author(s):  
R.A. Yund ◽  
J.R. Farver
Keyword(s):  
Grain Boundary ◽  
Fine Grained ◽  
Grain Boundary Transport

scholarly journals Electrical properties of fine-grained olivine: Evidence for grain boundary transport

2004 ◽  
Vol 109 (B6) ◽  
Author(s):  
Saskia M. ten Grotenhuis ◽  
Martyn R. Drury ◽  
Colin J. Peach ◽  
Chris J. Spiers
Keyword(s):  
Electrical Properties ◽  
Grain Boundary ◽  
Fine Grained ◽  
Grain Boundary Transport

Grain boundary relaxation in fine-grained magnesium solid solutions

2011 ◽  
Vol 91 (32) ◽  
pp. 4158-4171 ◽  
Author(s):  
Hiroyuki Watanabe ◽  
Akira Owashi ◽  
Tokuteru Uesugi ◽  
Yorinobu Takigawa ◽  
Kenji Higashi
Keyword(s):  
Grain Boundary ◽  
Solid Solutions ◽  
Fine Grained ◽  
Boundary Relaxation

Influence of texture on dislocation creep and grain boundary sliding in fine-grained cadmium

1983 ◽  
Vol 31 (5) ◽  
pp. 763-772 ◽  
Author(s):  
Shu-en Hsu ◽  
G.R. Edwards ◽  
O.D. Sherby
Keyword(s):  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Dislocation Creep ◽  
Fine Grained ◽  
Boundary Sliding

Improvement of Superplasticity in Fine-Grained Oxide Ceramics Based on the Concept of Grain Boundary Plasticity

2016 ◽  
Vol 838-839 ◽  
pp. 34-40
Author(s):  
Hidehiro Yoshida ◽  
Koji Morita ◽  
Byung Nam Kim ◽  
Koji Matsui ◽  
Yuichi Ikuhara ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Atomic Structure ◽  
Nucleation And Growth ◽  
Phenomenological Analysis ◽  
Research Field ◽  
Oxide Ceramics ◽  
Cavity Nucleation ◽  
Fine Grained ◽  
Experimental Strain ◽  
New Research

Superplasticity in fine-grained oxide ceramics has been generally elucidated on the basis of their experimental strain rate-flow stress relationship and phenomenological analysis of cavity nucleation and growth. It has been widely accepted that the high temperature superplastic flow and failure in ceramics is significantly influenced by the atomic structure and chemistry of grain boundaries. Such phenomenon cannot be explained based on the classical phenomenological analysis. Our research group has therefore proposed to establish a new research field, grain boundary plasticity, to describe the superplastic deformation related to the grain boundary atomic structure. This paper aims to point out the importance of the atomistic analysis of grain boundary to develop new superplastic ceramics.

Effect of oxygen partial pressure on grain-boundary transport in alumina

2018 ◽  
Vol 153 ◽  
pp. 205-213 ◽  
Author(s):  
Yan Wang ◽  
Helen M. Chan ◽  
Jeffrey M. Rickman ◽  
Martin P. Harmer
Keyword(s):  
Grain Boundary ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Effect Of Oxygen ◽  
Grain Boundary Transport

Effect of process parameters on the microstructure evolution of laser surface quenched Ni-Al bronze

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040029
Author(s):  
Zhenbo Qin ◽  
Da-Hai Xia ◽  
Yida Deng ◽  
Wenbin Hu ◽  
Zhong Wu
Keyword(s):  
Grain Boundary ◽  
Process Parameters ◽  
Microstructure Evolution ◽  
Laser Scanning ◽  
Threshold Value ◽  
Laser Surface ◽  
High Rate ◽  
Fine Grained ◽  
Surface Quenching ◽  
Overlap Ratio

Laser surface quenching technology was used to modify the surface microstructure of as-cast Ni-Al bronze (NAB). The modified microstructure was studied by scanning electron microscopy (SEM), and the effect of laser process parameters on microstructure evolution was investigated. It was found that a fine-grained zone with fully [Formula: see text] phase microstructure formed on the surface of NAB. The depth of the fine-grained zone increased with the increase of laser power, and surface melting occurred when the power reached a threshold value. Laser scanning at a low rate caused the coarsening of grain boundary, while too high rate led to incomplete quenching. Spot overlap ratio determined the microstructure of the superimposed area, and unsuitable ratio would cause bulky [Formula: see text] precipitation at the grain boundary or incomplete transformation from [Formula: see text] phase to [Formula: see text] phase.

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