Synthesis of sub-micrometer biphasic Au–AuGa2/liquid metal frameworks

Nanoscale ◽  
2019 ◽  
Vol 11 (44) ◽  
pp. 21419-21432 ◽  
Author(s):  
Romain David ◽  
Norihisa Miki
Keyword(s):  
Crystal Structure ◽  
Liquid Metal ◽  
Au Nanoparticle ◽  
Metal Shell ◽  
Nanoparticle Morphology ◽  
Fine Control

Biphasic Au nanoparticle–liquid metal shell–core sub-micrometer droplets are synthesized with fine control of the nanoparticle morphology, composition and crystal structure.

Liquid Metal Shell as an Effective Iron Oxide Modifier for Redox-Based Hydrogen Production at Intermediate Temperatures

ACS Catalysis ◽  
2021 ◽  
pp. 10228-10238
Author(s):  
Iwei Wang ◽  
Yunfei Gao ◽  
Xijun Wang ◽  
Runxia Cai ◽  
Chingchang Chung ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Hydrogen Production ◽  
Liquid Metal ◽  
Metal Shell

The controlled synthesis of plasmonic nanoparticle clusters as efficient surface-enhanced Raman scattering platforms

2015 ◽  
Vol 51 (42) ◽  
pp. 8793-8796 ◽  
Author(s):  
Seunghoon Lee ◽  
Jong Wook Hong ◽  
Su-Un Lee ◽  
Young Wook Lee ◽  
Sang Woo Han
Keyword(s):  
Ag Nanoparticles ◽  
Au Nanoparticle ◽  
Galvanic Replacement ◽  
Controlled Synthesis ◽  
Plasmonic Nanoparticle ◽  
Surface Enhanced ◽  
Nanoparticle Clusters ◽  
Surface Enhanced Raman ◽  
Fine Control ◽  
Enhanced Raman Scattering

Au nanoparticle clusters were prepared by fine control over the galvanic replacement of Ag nanoparticles with Au precursors.

scholarly journals Cavitation in Cylindrical Liquid Metal Shell Imploded for Axial Magnetic Flux Compression

1982 ◽  
Vol 19 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Yasuyuki ITOH ◽  
Takashi KANAGAWA ◽  
Keiji MIYAZAKI ◽  
Yoichi FUJII-E
Keyword(s):  
Liquid Metal ◽  
Magnetic Flux ◽  
Metal Shell ◽  
Flux Compression ◽  
Magnetic Flux Compression

scholarly journals Electromagnetic stirring in billet CCM molds and continuously casted billet quality

2019 ◽  
Vol 75 (8) ◽  
pp. 955-961
Author(s):  
S. I. Shakhov ◽  
K. N. Vdovin
Keyword(s):  
Liquid Metal ◽  
Science Studies ◽  
Gas Bubbles ◽  
Carbon Steels ◽  
Electromagnetic Stirring ◽  
Low Carbon ◽  
High Carbon ◽  
Metal Shell ◽  
Average Growth

Electromagnetic stirring (EMS) is one of methods to improve the quality of continuously casted billet. Under EMS impact nonmetallic inclusions are removed out of the solidification area and move to the center of meniscus of liquid metal. Besides, high speeds of convection flows in the liquid metal avoid the remaining of gases at the crystallization border and decrease therefore the number of gas bubbles under metal shell. This mechanism of EMS action in a mold results in decreasing of gas bubbles under the metal shell and impurities in continuously casted billet. Operation of a billet CCM was studied at Moldavsky steel-works, where an EMS stator was imbedded into the mold. Influence of EMS on the quality of continuously casted billet was studied. The work was accomplished in several stages. First, the EMS system with a test mold with electromagnetic stirrer was studied for casting of 135×135 mm billets and 800 mm long, next 125×125 mm billet and 1000 mm long and then 125×125 mm billet and 800 mm long. Main comparative parameters of used EMS systems in the mold presented in the article. All the molds-EMS systems were designed based on existing regular molds so that they could be installed at the CCM without changing the existing oscillation frame and water input and output piping. As a result of templates metal science studies cut out of test and regular metal, influence of EMS in the mold on the billet macro structure was revealed, comparing with a standard strand. The following phenomena were studied: decrease of average degree of cracks and liquation strips along the billet section, of cracks in the billet axis zone, central pore volume and border point contaminations; increase of axis liquation degree (but liquation became more distributed), decrease of carbon axis liquation coefficient in high carbon steels. The average growth values of equiaxed crystal zone at the templates of test heats with EMS amounted for 55% at high carbon steels comparing with regular billet templates, at the middle carbon steels – 48%, at the low carbon steels – 92%. The elaborated EMS system in the mold allows improving considerably the quality of continuously casted billets.

Microstructure Transition during Rapid Solidification of Liquid Metal Zn

2014 ◽  
Vol 997 ◽  
pp. 574-577
Author(s):  
You Lin Peng ◽  
Li Li Zhou ◽  
Lan Zhen Chen
Keyword(s):  
Crystal Structure ◽  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Liquid Metal ◽  
Cooling Rate ◽  
Rapid Solidification ◽  
Simulation Study ◽  
Dynamics Simulation

A molecular dynamics simulation study has been performed for a system consisting of 10,000 atoms to investigate the microstructure evolutions during the rapid solidification. Results indicate that the crystallization has not enough time to complete due to the high cooling rate; therefore, a part of crystal structure is formed, in which the hcp and fcc basic clusters and some other metallic type clusters coexist in the final solidified structure.

scholarly journals Solidification of Metals and Alloys

2020 ◽  
Author(s):  
Upendra Kumar Mohanty ◽  
Hrushikesh Sarangi
Keyword(s):  
Crystal Structure ◽  
Liquid Metal ◽  
Growth Process ◽  
Metals And Alloys ◽  
Liquid Metal Surface ◽  
The Common ◽  
Pure Metals ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Rates Of Growth

In order to analyse the process of solidification of metals and alloys critically, it is most pertinent to understand the different modes of nucleation and the uneven rates of growth throughout the melt. It is also important to take a note of the constraints in the growth process that definitely influence the crystal structure and the structure related properties of the casting. The freezing pattern of the liquid melt decides the feeding of the mould which is instrumental in producing a complete and compact casting. For pure metals and even in case of alloys with a narrow freezing range a well defined solid–liquid macro-interface exists. Here feeding of the solidifying casting is the easiest, by the common lowering of the liquid metal surface in the mould. However, in many instances, a well defined interface is not witnessed. The solid–liquid interface could be discrete and not continuous. Here process of feeding the solidification sites that witness considerable shrinkages, may become complicated. On grounds of above it is implied, the process of solidification constitutes an important aspects in the production of a defect free casting.

scholarly journals Stability of Fe-Based Alloys With Structure Type C6Cr23

2005 ◽  
Vol 20 (1) ◽  
pp. 237-242 ◽  
Author(s):  
M. Widom ◽  
M. Mihalkovic
Keyword(s):  
Crystal Structure ◽  
Liquid Metal ◽  
First Principles ◽  
Structure Type ◽  
Metal Alloys ◽  
Dominant Factor ◽  
Bulk Glass ◽  
Atomic Size ◽  
Glass Forming ◽  
Iron Based

Bulk metallic glass forms when liquid metal alloys solidify without crystallization. In the search for iron-based bulk glass-forming alloys of the metal–metalloid type (Fe–B- and Fe–C-based), crystals based on the structural prototype C6Cr23 often preempt the amorphous phase. Destabilizing this competing crystal structure could enhance glass formability. We carried out first-principles total energy calculations of enthalpy of formation to identify third elements that can effectively destabilize C6Cr23. Yttrium appears optimal among transition metals, and rare earths also are suitable. Atomic size is the dominant factor.

Crystal Structure Determination of Glycerol-Containing Lipids from Electron Diffraction Data. Use of Analog Compounds Based upon Configurational Isomers of Cyclopentane-1, 2, 3-TRIOL

1977 ◽  
Vol 35 ◽  
pp. 24-25
Author(s):  
Douglas L. Dorset ◽  
Anthony J. Hancock
Keyword(s):  
Crystal Structure ◽  
Electron Diffraction ◽  
Diffraction Data ◽  
Structure Determination ◽  
Crystal Surface ◽  
Coherent Scattering ◽  
Crystal Structure Determination ◽  
Electron Diffraction Data ◽  
Polar Group ◽  
Axis Orientation

Lipids containing long polymethylene chains were among the first compounds subjected to electron diffraction structure analysis. It was only recently realized, however, that various distortions of thin lipid microcrystal plates, e.g. bends, polar group and methyl end plane disorders, etc. (1-3), restrict coherent scattering to the methylene subcell alone, particularly if undistorted molecular layers have well-defined end planes. Thus, ab initio crystal structure determination on a given single uncharacterized natural lipid using electron diffraction data can only hope to identify the subcell packing and the chain axis orientation with respect to the crystal surface. In lipids based on glycerol, for example, conformations of long chains and polar groups about the C-C bonds of this moiety still would remain unknown.One possible means of surmounting this difficulty is to investigate structural analogs of the material of interest in conjunction with the natural compound itself. Suitable analogs to the glycerol lipids are compounds based on the three configurational isomers of cyclopentane-1,2,3-triol shown in Fig. 1, in which three rotameric forms of the natural glycerol derivatives are fixed by the ring structure (4-7).

Sign in / Sign up

Export Citation Format

Share Document