scholarly journals Intrinsic microstructural anisotropy in tape cast ceramics by ice templating

2020 ◽  
Vol 17 (5) ◽  
pp. 2202-2211
Author(s):  
Stephen K. Heywood ◽  
Konstantin Romanenko ◽  
Stephen W. Sofie ◽  
Sarah L. Codd
Keyword(s):  
Microstructural Anisotropy ◽  
Tape Cast ◽  
Ice Templating

Processing and characterization of YBa2Cu3O7−x/Ag composites

1990 ◽  
Vol 48 (4) ◽  
pp. 46-47
Author(s):  
Jafar Javadpour ◽  
Bradley L. Thiel ◽  
Sarikaya Mehmet ◽  
Ilhan A. Aksay
Keyword(s):  
Composite System ◽  
Precursor Solution ◽  
Microstructural Development ◽  
Superconducting Properties ◽  
Practical Applications ◽  
Nitrate Precursor ◽  
Cold Pressed ◽  
Tape Cast ◽  
Composite Samples

Practical applications of bulk YBa2Cu3O7−x materials have been limited because of their inadequate critical current density (jc) and poor mechanical properties. Several recent reports have indicated that the addition of Ag to the YBa2Cu3O7−x system is beneficial in improving both mechanical and superconducting properties. However, detailed studies concerning the effect of Ag on the microstructural development of the cermet system have been lacking. Here, we present some observations on the microstructural evolution in the YBa2Cu3O7−x/Ag composite system.The composite samples were prepared by mixing various amounts (2.5 - 50 wt%) AgNO3 in the YBa2Cu3O7−x nitrate precursor solution. These solutions were then spray dried and the resulting powders were either cold pressed or tape cast. The microstructures of the sintered samples were analyzed using SEM (Philips 515) and an analytical TEM (Philips 430T).The SEM micrographs of the compacts with 2.5 and 50 wt% Ag addition sintered at 915°C (below the melting point of Ag) for 1 h in air are displayed in Figs. 1 and 2, respectively.

Eco-fabrication of hierarchical porous silica monoliths by ice-templating of rice husk ash

2017 ◽  
Vol 19 (1) ◽  
pp. 188-195 ◽  
Author(s):  
Amin Bahrami ◽  
Ulla Simon ◽  
Niloofar Soltani ◽  
Sara Zavareh ◽  
Johannes Schmidt ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Porous Silica ◽  
Synthesis Process ◽  
Sustainable Chemistry ◽  
Silica Monoliths ◽  
Hierarchical Porous ◽  
Ice Templating

In this study, within a sustainable chemistry approach, a clean and eco-friendly synthesis process of silica monoliths compatible with environmental limitations is developed.

scholarly journals Controlling the lithium proton exchange of LLZO to enable reproducible processing and performance optimization

2021 ◽  
Author(s):  
Melanie Rosen ◽  
Ruijie Ye ◽  
Markus Mann ◽  
Sandra Lobe ◽  
Martin Finsterbusch ◽  
...  
Keyword(s):  
Performance Optimization ◽  
Proton Exchange ◽  
Mechanistic Understanding ◽  
And Performance ◽  
Tape Cast

A new, mechanistic understanding of the lithium proton exchange in LLZO enables reproducible processing and performance optimization for tape-cast components.

scholarly journals Coral-like directional porosity lithium ion battery cathodes by ice templating

2018 ◽  
Vol 6 (30) ◽  
pp. 14689-14699 ◽  
Author(s):  
Chun Huang ◽  
Patrick S. Grant
Keyword(s):  
Ion Transport ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Transport Direction ◽  
Ice Templating

Thick cathodes with aligned pore arrays in the predominant ion transport direction made by ice templating provided high areal and gravimetric capacities.

Experimental Analysis and Crystallographic Model of Plastic Deformation after a Change of Loading Path in Mild Steel Polycrystals

1999 ◽  
Vol 578 ◽  
Author(s):  
T. Hoc ◽  
C. Rey
Keyword(s):  
Plastic Deformation ◽  
Mild Steel ◽  
Strain Localization ◽  
Loading Path ◽  
Slip Systems ◽  
Finite Element Code ◽  
Dislocation Densities ◽  
Dislocation Interactions ◽  
Sequential Tests ◽  
Microstructural Anisotropy

AbstractStrain localization in mild steel submitted to a sequential loading paths is investigated at macroscopic, mesoscopic and microscopic scales. The experimental results demonstrate that the morphology of the localization and the nominal load-displacement curves depend on the microstructural anisotropy. A crystalline model using a finite element code is proposed. The anisotropy is described by a hardening matrix whose terms correspond to dislocation-dislocation interactions and depend on the evolution of the dislocation densities on the activated slip systems during the sequential tests. The strain localization predicted by this model fits with the experimental observation and allows us to assume that localization is correlated to the saturation on the activated slip systems.

scholarly journals Turning of Additively Manufactured Ti6Al4V: Effect of the Highly Oriented Microstructure on the Surface Integrity

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2842
Author(s):  
Lucia Lizzul ◽  
Rachele Bertolini ◽  
Andrea Ghiotti ◽  
Stefania Bruschi
Keyword(s):  
Surface Integrity ◽  
Cryogenic Cooling ◽  
Powder Layer ◽  
Layer By Layer ◽  
Turning Operations ◽  
Powder Bed ◽  
Remarkable Effect ◽  
Scanning Strategies ◽  
Machining Operations ◽  
Microstructural Anisotropy

Additive manufacturing processes induce a high orientation in the microstructure of the printed part due to the strong thermal gradients developed during the process caused by the highly concentrated heat source that is used to melt the metal powder layer-by-layer. The resulting microstructural anisotropy may have an effect on the post-processing operations such as machining ones. This paper investigates the influence of the anisotropy in turning operations carried out on laser powder bed fused Ti6Al4V parts manufactured with different scanning strategies. The machinability under both transverse and cylindrical turning operations was assessed in terms of surface integrity, considering both surface and sub-surface aspects. The effect of the different cooling conditions, that is flood and cryogenic ones, was studied as well. The outcomes showed that the microstructural anisotropy had a remarkable effect on the machining operations and that the cryogenic cooling enhanced the effect of the anisotropy in determining the surface integrity.

scholarly journals Development of TiO2–SiO2 Photocatalysts Having a Microhoneycomb Structure by the Ice Templating Method

ACS Omega ◽  
2018 ◽  
Vol 3 (10) ◽  
pp. 14274-14279
Author(s):  
Kasama Urkasame ◽  
Seiichiro Yoshida ◽  
Taihei Takanohashi ◽  
Shinichiroh Iwamura ◽  
Isao Ogino ◽  
...  
Keyword(s):  
Templating Method ◽  
Ice Templating
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