In situtransmission electron microscopy analysis of electron beam induced crystallization of amorphous marks in phase-change materials

2004 ◽  
Vol 96 (6) ◽  
pp. 3193-3198 ◽  
Author(s):  
M. Kaiser ◽  
L. van Pieterson ◽  
M. A. Verheijen
Keyword(s):  
Electron Microscopy ◽  
Electron Beam ◽  
Phase Change ◽  
Phase Change Materials ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis ◽  
Induced Crystallization

scholarly journals The Influence of Neodymium Element on the Crater Structure Formed on Al-17.5Si Alloy Surface Processed by High-Current Pulsed Electron Beam

Coatings ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 922
Author(s):  
Kui Li ◽  
Bo Gao ◽  
Ning Xu ◽  
Yue Sun ◽  
Vladimir Viktorovich Denisov ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Electron Beam ◽  
Primary Silicon ◽  
Structural Defects ◽  
Metallic Materials ◽  
High Current ◽  
Metallic Material ◽  
Pulsed Electron Beam ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis

The effect of neodymium element on the elimination of crater structures on the surface of Al-17.5Si metallic materials processed by high-current pulsed electron beam was investigated in this study. Field emission scanning electron microscopy analysis indicated that the grain sizes of Al-17.5Si metallic materials were reduced and craters were removed from surfaces of the processed Al-17.5Si metallic material after addition of Nd. This can be attributed to the efficient transfer of heat accumulated in rich-silicon (primary silicon) areas without the eruption of a primary silicon phase if the size of primary silicon grains are small. The X-ray diffraction analysis indicates that all diffraction peaks are broadened because of the presence of structural defects, grain refinement and stress state. Electron probe micro-analyzer analysis demonstrated that Al and Nd were evenly distributed on the surface of the treated alloy, which could be attributed to the diffusion of the element. Transmission electron microscopy analysis showed that nano-Al and nano-Si cellular textures were generated during the treated process. The formation of these structures can be attributed to rapid heating and cooling effects by the treatment. Finally, electrochemical tests revealed that the corrosion current density of Al-17.5Si metallic materials (with Nd, 0.3 wt.%.) surface decreased by three orders of magnitude compared with that of the processed Al-17.5Si metallic material surfaces (without Nd). This can be attributed to the elimination of craters and grain refining.

Electron-beam-irradiation-induced crystallization of amorphous solid phase change materials

2018 ◽  
Vol 57 (4) ◽  
pp. 041401 ◽  
Author(s):  
Dong Zhou ◽  
Liangcai Wu ◽  
Lin Wen ◽  
Liya Ma ◽  
Xingyao Zhang ◽  
...  
Keyword(s):  
Electron Beam ◽  
Phase Change ◽  
Electron Beam Irradiation ◽  
Phase Change Materials ◽  
Solid Phase ◽  
Amorphous Solid ◽  
Beam Irradiation ◽  
Induced Crystallization

scholarly journals Electron microscopy analysis of biofilms produced by Staphylococcus aureus exposed to UV-light on the surface of SnO2 thin films

2021 ◽  
Vol 27 (S1) ◽  
pp. 3168-3170
Author(s):  
Hazel Jaynelle Morales-Rodriguez ◽  
Javier Camarillo-Cisneros ◽  
María Alejandra Favila-Pérez ◽  
Alva Rocío Castillo-González ◽  
Celia María Quiñonez-Flores ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Staphylococcus Aureus ◽  
Uv Light ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis ◽  
Sno2 Thin Films

scholarly journals pH-controlled synthesis of sustainable lauric acid/SiO2 phase change material for scalable thermal energy storage

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shafiq Ishak ◽  
Soumen Mandal ◽  
Han-Seung Lee ◽  
Jitendra Kumar Singh
Keyword(s):  
Electron Microscopy ◽  
Phase Change ◽  
Lauric Acid ◽  
Photoelectron Spectroscopy ◽  
Phase Change Materials ◽  
Precursor Solution ◽  
Thermal Reliability ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Heating And Cooling

AbstractLauric acid (LA) has been recommended as economic, eco-friendly, and commercially viable materials to be used as phase change materials (PCMs). Nevertheless, there is lack of optimized parameters to produce microencapsulated PCMs with good performance. In this study, different amounts of LA have been chosen as core materials while tetraethyl orthosilicate (TEOS) as the precursor solution to form silicon dioxide (SiO2) shell. The pH of precursor solution was kept at 2.5 for all composition of microencapsulated LA. The synthesized microencapsulated LA/SiO2 has been characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-Ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM), and Transmission electron microscopy (TEM). The SEM and TEM confirm the microencapsulation of LA with SiO2. Thermogravimetric analysis (TGA) revealed better thermal stability of microencapsulated LA/SiO2 compared to pure LA. PCM with 50% LA i.e. LAPC-6 exhibited the highest encapsulation efficiency (96.50%) and encapsulation ratio (96.15%) through Differential scanning calorimetry (DSC) as well as good thermal reliability even after 30th cycle of heating and cooling process.

scholarly journals Focused Ion Beam (FIB) Preparation and Electron Microscopy Analysis of Individual Microbolometer Pixels

2006 ◽  
Vol 12 (S02) ◽  
pp. 1270-1271
Author(s):  
M Olszta ◽  
J Dougherty ◽  
M Horn ◽  
EC Dickey
Keyword(s):  
Electron Microscopy ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis

Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2005

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