scholarly journals In-situ Optical Microscopy of Crystal Growth of Graphene Using Thermal Radiation

2019 ◽  
Vol 62 (10) ◽  
pp. 629-634
Author(s):  
Tomo-o TERASAWA ◽  
Takanobu TAIRA ◽  
Seiji OBATA ◽  
Koichiro SAIKI ◽  
Satoshi YASUDA ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Thermal Radiation ◽  
Optical Microscopy

In-situ observation of crystal growth of zeolite ZSM-5 under steaming conditions by optical microscopy

1993 ◽  
Vol 1 (5) ◽  
pp. 353-357 ◽  
Author(s):  
T. Sano ◽  
Y. Kiyozumi ◽  
F. Mizukami ◽  
A. Iwasaki ◽  
M. Ito ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Optical Microscopy ◽  
In Situ Observation

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

In Situ Raman Spectroscopy Studies on La2CaB10O19 Crystal Growth

2020 ◽  
Vol 20 (10) ◽  
pp. 6604-6609
Author(s):  
Shanshan Liu ◽  
Guochun Zhang ◽  
Kai Feng ◽  
Yanyang Han ◽  
Tao He ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Crystal Growth ◽  
In Situ Raman Spectroscopy ◽  
In Situ Raman ◽  
Spectroscopy Studies

scholarly journals In-situ SEM and optical microscopy testing for investigation of fatigue crack growth mechanism under overload

2018 ◽  
Vol 165 ◽  
pp. 13013
Author(s):  
Wei Zhang ◽  
Liang Cai
Keyword(s):  
Growth Rate ◽  
Crack Growth Rate ◽  
Optical Microscopy ◽  
Crack Growth ◽  
Load Condition ◽  
Crack Tip ◽  
Initial Crack ◽  
Crack Growth Behavior ◽  
Single Overload

In this paper, the in-situ scanning electron microscope (SEM) and optical microscopy experiments are performed to investigate the crack growth behavior under the single tensile overload. The objectives are to (i) examine the overload-induced crack growth micromechanisms, including the initial crack growth acceleration and the subsequent retardation period; (ii) investigate the effective region of single overload on crack growth rate. The specimen is a small thin Al2024-T3 plate with an edge-crack, which is loaded and observed in the SEM chamber. The very high resolution images of the crack tip are taken under the simple variable amplitude loading. Imaging analysis is performed to quantify the crack tip deformation at any time instant. Moreover, an identical specimen subjected to the same load condition is observed under optical microscope. In this testing, fine speckling is performed to promote the accuracy of digital imaging correlation (DIC). The images around the crack tip are taken at the peak loads before, during and after the single overload. After that, the evolution of local strain distribution is obtained through DIC technique. The results show that the rapid connection between the main crack and microcracks accounts for the initial crack growth acceleration. The crack closure level can be responsible for the crack growth rate during the steady growth period. Besides that, the size of retardation area is larger than the classical solution.

In situ high temperature optical microscopy study of phase evolution in YBa2Cu3O7−δ films prepared by a fluorine-free sol–gel route

2006 ◽  
Vol 436 (2) ◽  
pp. 62-67 ◽  
Author(s):  
Yulong Zhang ◽  
Xin Yao ◽  
Jie Lian ◽  
Lumin Wang ◽  
Aihua Li ◽  
...  
Keyword(s):  
High Temperature ◽  
Optical Microscopy ◽  
Sol Gel ◽  
Phase Evolution ◽  
Microscopy Study
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