Grain boundary
Fluid-assisted grain boundary sliding in bedding-parallel quartz veins deformed under greenschist metamophic grade
... (large grain domains) to superplastic-like regimes (Ashby and Verall, 1973; Boullier and Gueguen, 1975; Schmid, 1982; Poirier, 1985; Rutter et ...flat grain boundaries parallel to the foliation ...
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Surface transition on ice induced by the formation of a grain boundary.
... Cryogels of polyvinyl alcohol, PVA, were produced by dissolving 6 wt% PVA (Mw 89,000–98,000) in water, and the solution was subjected to 7 freeze-thaw cycles (each cycle contained approximately 20 hours at 220uC followed ...
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SEM observation of grain boundary structures in quartz-iron oxide rocks deformed at intermediate metamorphic conditions
... The grain boundary and pore geometries suggest a fluid-solid interaction in these rocks and also indicate that static grain growth (involving grain boundary mi- gration in the presence ...
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The Contribution of Mechanical Spectroscopy to Understanding Grain Boundary Sliding
... that grain boundary sliding (GBS) is a general phenomenon occurring in all classes of inorganic materials: ceramics, metals and composite ...the grain boundaries. Instead, according to the ...
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Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
... at grain boundary concerning cobalt and manganese, decreasing the nonohmic electrical properties, as discussed, likely due to the increasing of grain boundary non-active potential ...
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Numerical modelling of intergranular fracture in polycrystalline materials and grain size effects
... the grain size effects on the tensile strength of polycrystals, it has to be remarked that an inversion of the trend suggested by Hall and Petch has been observed at the ...the grain boundary ...
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Diffusion of iron in Cr2O3 : polycrystals and thin films
... were established by secondary ion mass spectrometry (SIMS). Two diffusion domains appear whatever the nature of the chromia material, polycrystals or films. In the first domain, using a solution of the Fick’s second law ...
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Effect of Solid Solution + Double Ageing on Microstructure and Properties in the Layer by Layer of the Z-Y Interface of Inconel 718 alloys Fabricated by SLM
... fine grain structure after the heat treatment process of 1050ºC solid solution + double ...the grain boundary, and the typical dendritic crystallization and Laves phases ...the grain ...
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Mat. Res. vol.16 número5
... the grain boundary, improving the ionic grain boundary electrical conductivity at air atmosphere which was attributed to the Pr influence on the space charge ...
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Mat. Res. vol.6 número2
... boundary diffusion coefficient can be estimated from Eq. 10. Figure 5 shows the comparison between the volume dif- fusion coefficients (D) and the grain-boundary diffusion coefficients (D’). It is ...
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Mat. Res. vol.7 número1
... that grain boundary oxidation governs the grain-boundary-separation process, as has been proposed in sev- eral studies on the fatigue-damage behavior of the nickel-base superalloy ...
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Mat. Res. vol.19 número1
... study on the oxidation of copper over the temperature range 350 °C to 1050 °C. They suggested that the oxidation within a temperature range from 350 °C to 550 °C is controlled by the grain boundary ...
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Eect of grain-boundaries on uranium and oxygen diusion in polycrystalline UO2
... uranium grain-boundary diusion coecients, measured in this work, with the previous results determined by Alcock et ...the grain- boundary diusion coecients determined in the previ- ous ...
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Microstructures, crystallographic fabric development and deformation mechanisms in natural hematite aggregates deformed under varied metamorphic conditions
... transformed to hematite. The CPO patterns become more defined (Fig. 6 and Fig. 8bed) and misorientation angle distribution histo- grams show an increasing misfit of the distribution of misorienta- tion angles and the ...
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Laboratoire d’Etude des Matériaux Hors-Équilibre, ICMMO, LEMHE, CNRS UMR 8182,Université Paris XI, 91405 Orsay, France
... in grain- boundaries, when compared to the oxygen diffusion in undoped ZnO polycrystal under the same experimental ...in grain-boundaries. The results also show that the grain boundary is a ...
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Braz. J. Phys. vol.40 número3
... the grain boundary, while the grain size is about ...clear grain bound- ary and uniformly distributed grain size could enhance the mechanical strength of piezoelectric ceramics and be ...
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Microstructure Evolution and Properties of Friction Stir Welding Joint for 6082-T6 Aluminum Alloy
... of grain morphologies, grain boundary features, and dislocation structure in upper part of nugget zone during friction stir welding of 6082-T6 aluminum alloys, electron backscattered diffraction and ...
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Mat. Res. vol.12 número1
... the grain boundary region, with the contribution of the grains being indicated by the formation of a second semicircle at high ...bigger grain sizes and higher ...
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Mat. Res. vol.11 número2
... in grain- boundaries, when compared to the oxygen diffusion in undoped ZnO polycrystal under the same experimental ...in grain-boundaries. The results also show that the grain boundary is a ...
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Influence o the microstructure of duplex stainless steels on their failure characteristics during hot deformation.
... single phase ferritic stainless steels soften by intense dy- namic recovery while austenitic stainless steels, with rela- tively low stacking fault energy, soften by dynamic recrystallization 6,7 . When the two phases ...
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