scholarly journals Mechanical Stress Induced Current Focusing and Fracture in Grain Boundaries

2019 ◽  
Vol 166 (10) ◽  
pp. A1752-A1762 ◽  
Author(s):  
Pallab Barai ◽  
Kenneth Higa ◽  
Anh T. Ngo ◽  
Larry A. Curtiss ◽  
Venkat Srinivasan
Keyword(s):  
Grain Boundaries ◽  
Mechanical Stress ◽  
Induced Current ◽  
Current Focusing

Dynamics of grain boundaries under applied mechanical stress

2011 ◽  
Vol 46 (12) ◽  
pp. 4318-4326 ◽  
Author(s):  
Dmitri A. Molodov ◽  
Tatiana Gorkaya ◽  
Günter Gottstein
Keyword(s):  
Grain Boundaries ◽  
Mechanical Stress

Gettering of Dissolved and Segregated Impurities in Multicrystalline Silicon Wafers

1992 ◽  
Vol 262 ◽  
Author(s):  
M. Stemmer ◽  
I. Perichaud ◽  
S. MartiNuzzi
Keyword(s):  
Grain Boundaries ◽  
Light Beam ◽  
Minority Carrier ◽  
Diffusion Length ◽  
Extended Defects ◽  
Induced Current ◽  
Minority Carrier Diffusion Length ◽  
Cast Ingot ◽  
Crystallographic Defects ◽  
Homogeneous Regions

ABSTRACTPhosphorus gettering by diffusion from a POCl3 source was applied to matched wafers cut out of the same region of a cast ingot. Light Beam Induced Current mappings with wavelengths in the range between 840 and 980 nm lead to follow the variation of minority carrier diffusion length after gettering at 900°C for 120 and 240 mn, especially near extended crystallographic defects like dislocations and grain boundaries.The mappings show that after the gettering treatments, the local values of L increase due to the reduction of the recombination strength of extended defects and to the improvement of the homogeneous regions of the grains.As SIMS analyses indicate that Fe, Cu and Ni atoms are gettered, it is reasonable to assume that these impurities were initially dissolved in the grains and also segregated at the extended defects.

scholarly journals Crystallite fusion in nanocellulose aggregates

2021 ◽  
Author(s):  
Kazuho Daicho ◽  
Kayoko Kobayashi ◽  
Shuji Fujisawa ◽  
Tsuguyuki Saito
Keyword(s):  
Energy Transfer ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Mechanical Stress ◽  
Thermal Energy ◽  
Structural Defect ◽  
Single Crystalline ◽  
Naturally Occurring

Abstract Crystallite refers to a single crystalline grain in crystal aggregates, and multiple crystallites form a grain boundary or the inter-crystallite interface. A grain boundary is a structural defect that hinders the efficient directional transfer of mechanical stress or thermal phonons in crystal aggregates. We observed that grain boundaries within an aggregate of a-few-nanometers-wide fibrillar crystallites of cellulose were crystallized by enhancing their inter-crystallite interactions; multiple crystallites were coupled into single fusion crystals without passing through a melting or dissolving state. Accordingly, the crystallinity of naturally occurring cellulose, which has previously been considered irreversible once decreased, was recovered, and the thermal energy transfer in the aggregate was significantly improved. Other fibrillar crystallites of chitin also showed a similar fusion phenomenon by enhancing the inter-crystallite interactions. Crystallite fusion in aggregates may occur for other biopolymers.

Electron-beam-induced current study of small-angle grain boundaries in multicrystalline silicon

2005 ◽  
Vol 52 (12) ◽  
pp. 1211-1215 ◽  
Author(s):  
J CHEN ◽  
T SEKIGUCHI ◽  
R XIE ◽  
P AHMET ◽  
T CHIKYO ◽  
...  
Keyword(s):  
Electron Beam ◽  
Grain Boundaries ◽  
Small Angle ◽  
Multicrystalline Silicon ◽  
Induced Current ◽  
Electron Beam Induced Current
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