In-situ characterization on the fracture behavior of three dimensional polymer nanocomposites reinforced by CNT sponge

2021 ◽  
pp. 109132
Author(s):  
Qing Ma ◽  
Bin Hao ◽  
Peng-Cheng Ma
Keyword(s):  
Polymer Nanocomposites ◽  
Fracture Behavior ◽  
Three Dimensional ◽  
In Situ Characterization

scholarly journals Morphology and Mechanical Properties of Fossil Diatom Frustules from Genera of Ellerbeckia and Melosira

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1615
Author(s):  
Qiong Li ◽  
Jürgen Gluch ◽  
Zhongquan Liao ◽  
Juliane Posseckardt ◽  
André Clausner ◽  
...  
Keyword(s):  
Fracture Behavior ◽  
Three Dimensional ◽  
Mechanical Tests ◽  
Fracture Force ◽  
Thickness Change ◽  
X Ray ◽  
Transmission Electron ◽  
Percentage Concentration ◽  
Morphology Characterization

Fossil frustules of Ellerbeckia and Melosira were studied using laboratory-based nano X-ray tomography (nano-XCT), transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS). Three-dimensional (3D) morphology characterization using nondestructive nano-XCT reveals the continuous connection of fultoportulae, tube processes and protrusions. The study confirms that Ellerbeckia is different from Melosira. Both genera reveal heavily silicified frustules with valve faces linking together and forming cylindrical chains. For this cylindrical architecture of both genera, valve face thickness, mantle wall thickness and copulae thickness change with the cylindrical diameter. Furthermore, EDS reveals that these fossil frustules contain Si and O only, with no other elements in the percentage concentration range. Nanopores with a diameter of approximately 15 nm were detected inside the biosilica of both genera using TEM. In situ micromechanical experiments with uniaxial loading were carried out within the nano-XCT on these fossil frustules to determine the maximal loading force under compression and to describe the fracture behavior. The fracture force of both genera is correlated to the dimension of the fossil frustules. The results from in situ mechanical tests show that the crack initiation starts either at very thin features or at linking structures of the frustules.

In-Situ Characterization of Deformation and Fracture Behavior of Hot-Rolled Medium Manganese Lightweight Steel

JOM ◽  
2018 ◽  
Vol 70 (5) ◽  
pp. 700-705 ◽  
Author(s):  
Zheng-zhi Zhao ◽  
Rong-hua Cao ◽  
Ju-hua Liang ◽  
Feng Li ◽  
Cheng Li ◽  
...  
Keyword(s):  
Fracture Behavior ◽  
In Situ Characterization ◽  
Lightweight Steel ◽  
Deformation And Fracture ◽  
Hot Rolled

scholarly journals Functional Tomographic Fluorescence Imaging of pH Microenvironments in Microbial Biofilms by Use of Silica Nanoparticle Sensors

2009 ◽  
Vol 75 (23) ◽  
pp. 7426-7435 ◽  
Author(s):  
Gabriela Hidalgo ◽  
Andrew Burns ◽  
Erik Herz ◽  
Anthony G. Hay ◽  
Paul L. Houston ◽  
...  
Keyword(s):  
Fluorescence Imaging ◽  
Tricarboxylic Acid Cycle ◽  
Three Dimensional ◽  
Silica Nanoparticle ◽  
In Situ Characterization ◽  
Local Conditions ◽  
Glucose Addition ◽  
Microbial Biofilms

ABSTRACT Attached bacterial communities can generate three-dimensional (3D) physicochemical gradients that create microenvironments where local conditions are substantially different from those in the surrounding solution. Given their ubiquity in nature and their impacts on issues ranging from water quality to human health, better tools for understanding biofilms and the gradients they create are needed. Here we demonstrate the use of functional tomographic imaging via confocal fluorescence microscopy of ratiometric core-shell silica nanoparticle sensors (C dot sensors) to study the morphology and temporal evolution of pH microenvironments in axenic Escherichia coli PHL628 and mixed-culture wastewater biofilms. Testing of 70-, 30-, and 10-nm-diameter sensor particles reveals a critical size for homogeneous biofilm staining, with only the 10-nm-diameter particles capable of successfully generating high-resolution maps of biofilm pH and distinct local heterogeneities. Our measurements revealed pH values that ranged from 5 to >7, confirming the heterogeneity of the pH profiles within these biofilms. pH was also analyzed following glucose addition to both suspended and attached cultures. In both cases, the pH became more acidic, likely due to glucose metabolism causing the release of tricarboxylic acid cycle acids and CO2. These studies demonstrate that the combination of 3D functional fluorescence imaging with well-designed nanoparticle sensors provides a powerful tool for in situ characterization of chemical microenvironments in complex biofilms.

In-Situ Characterization of Three-Dimensional Optical Matters by Light Diffraction

2009 ◽  
Vol 26 (7) ◽  
pp. 074201 ◽  
Author(s):  
Jiang Lai-Dong ◽  
Dai Qiao-Feng ◽  
Feng Tian-Hua ◽  
Liu Jin ◽  
Wu Li-Jun ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Light Diffraction ◽  
In Situ Characterization

In-situ characterization of three dimensional worn surface under sliding-rolling contact

Wear ◽  
2019 ◽  
Vol 426-427 ◽  
pp. 1781-1787 ◽  
Author(s):  
Chan Xu ◽  
Tonghai Wu ◽  
Yanwen Huo ◽  
Hongbin Yang
Keyword(s):  
Three Dimensional ◽  
Rolling Contact ◽  
In Situ Characterization ◽  
Worn Surface

Interfacial Coupling Boosts Giant Electrocaloric Effects in Relaxor Polymer Nanocomposites: In Situ Characterization and Phase‐Field Simulation

2018 ◽  
pp. 1801949 ◽  
Author(s):  
Jianfeng Qian ◽  
Renci Peng ◽  
Zhonghui Shen ◽  
Jianyong Jiang ◽  
Fei Xue ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Phase Field ◽  
In Situ Characterization ◽  
Interfacial Coupling ◽  
Phase Field Simulation ◽  
Field Simulation

scholarly journals Three-dimensional in situ characterization of phase transformation induced austenite grain refinement in nickel-titanium

2019 ◽  
Vol 162 ◽  
pp. 361-366 ◽  
Author(s):  
A.N. Bucsek ◽  
L. Casalena ◽  
D.C. Pagan ◽  
P.P. Paul ◽  
Y. Chumlyakov ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Grain Refinement ◽  
Three Dimensional ◽  
Nickel Titanium ◽  
In Situ Characterization ◽  
Austenite Grain
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