Formation mechanism and its photo-luminescent behavior of Lu2Ti2O7 nano-plates composed of single crystal grains

CrystEngComm ◽  
2013 ◽  
Vol 15 (30) ◽  
pp. 5956 ◽  
Author(s):  
Bao-rang Li ◽  
Yang Yang ◽  
Zhongliang Hu ◽  
Yongquan Guo ◽  
Naiqiang Zhang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Formation Mechanism ◽  
Photo Luminescent ◽  
Crystal Grains ◽  
Luminescent Behavior

Investigation of Interatomic Potential on Chip Formation Mechanism in Nanometric Cutting Using MD Simulation

2011 ◽  
Vol 312-315 ◽  
pp. 983-988
Author(s):  
Seyed Vahid Hosseini ◽  
Mehrdad Vahdati ◽  
Ali Shokuhfar
Keyword(s):  
Single Crystal ◽  
Formation Mechanism ◽  
Chip Formation ◽  
Morse Potential ◽  
Md Simulation ◽  
Atomic Displacement ◽  
Cutting Process ◽  
Machining Process ◽  
Chip Formation Mechanism ◽  
Eam Potential

Nowadays, the nano-machining process is used to produce high quality finished surfaces with precise form accuracy. To understand and analyze the chip formation mechanism of nano-machining process on an atomistic scale, since the experimentation is not an easy task, numerical simulation such as molecular dynamic (MD) simulation is a very useful method. In this paper, MD simulation of the nano-metric cutting of single-crystal copper was performed with a single crystal diamond tool. The model was solved with both pair wise Morse potential function and embedded atom method (EAM) potential to simulate the inter-atomic force between the work-piece and a rigid tool. The chip formation mechanism, dislocation generation, tool forces and generated temperature were investigated. Results show that the Morse potential cannot perform an appropriate defect formation and plastic deformation in nano-metric cutting of metals. Also, tool forces in Morse potential are more than the forces in EAM potential. Furthermore, the fluctuations of resultant forces in Morse potential are greater than that of EAM. In addition, using many-body interaction potentials like EAM can lead to substantial changes in surface energies, elastic-plastic properties and atomic displacement, compared with the pair-wise potentials like Morse. Finally, the atomic displacement investigation shows that in EAM potential study, only the atoms in a local region near the cutting process are displaced, but in Morse potential a large portion of atoms has affected during cutting process. Subsequently, the chip temperature in EAM potential is more than that of Morse potential.

scholarly journals Single-Crystal MgO Hollow Nanospheres Formed in RF Impulse Discharge Plasmas

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Satoru Iizuka ◽  
Takumasa Muraoka
Keyword(s):  
Radio Frequency ◽  
Single Crystal ◽  
Formation Mechanism ◽  
Hollow Nanospheres ◽  
Mgo Nanoparticles ◽  
Impulse Discharge ◽  
Discharge Plasmas ◽  
Cooling Model

Spherical MgO nanoparticles with a hollow inside, that is, MgO hollow nanospheres, were created in Ar/O2plasma produced by radio frequency (RF) impulse discharge using a Mg rod electrode. The hollow nanospheres were found on the SiO2plates placed near the powered Mg electrode. The electron refraction pattern showed that each nanosphere was made of a single crystal of MgO. Since the shape was spherical, these nanoparticles seemed to be created during the levitation in the plasma without touching any walls. The formation mechanism with a quasiliquid cooling model was also discussed.

Controllable synthesis and formation mechanism of single-crystal β-Co(OH)2 microrings as sensors for detection of nitrite ions

2017 ◽  
Vol 193 ◽  
pp. 371-379 ◽  
Author(s):  
Cui Tingting ◽  
Yanting Zhao ◽  
Yao Qian ◽  
Yali Shao ◽  
Mengting Fan ◽  
...  
Keyword(s):  
Single Crystal ◽  
Formation Mechanism ◽  
Controllable Synthesis

The hydrothermal synthesis and formation mechanism of single-crystalline perovskite BiFeO3 microplates with dominant (012) facets

CrystEngComm ◽  
2014 ◽  
Vol 16 (20) ◽  
pp. 4176-4182 ◽  
Author(s):  
Xin Yang ◽  
Gang Xu ◽  
Zhaohui Ren ◽  
Xiao Wei ◽  
Chunying Chao ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Single Crystal ◽  
Hydrothermal Method ◽  
Formation Mechanism ◽  
Organic Ligands ◽  
Adsorption Behaviour ◽  
One Pot ◽  
Single Crystalline

Single-crystal BiFeO3 (BFO) microplates with dominant (012) facets were successfully synthesized by a facile one-pot hydrothermal method. The adsorption behaviour of the organic ligands may play a key role in the formation of the BFO microplates.

Hydrothermal synthesis, characterization, formation mechanism and electrochemical property of V3O7·H2O single-crystal nanobelts

2010 ◽  
Vol 175 (2) ◽  
pp. 164-171 ◽  
Author(s):  
Yifu Zhang ◽  
Xinghai Liu ◽  
Guangyong Xie ◽  
Lei Yu ◽  
Shengping Yi ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Single Crystal ◽  
Formation Mechanism ◽  
Electrochemical Property

scholarly journals Formation Mechanism of Strip Defects in Anodizing AA5252 Aluminium Alloy Sheets

2020 ◽  
Vol 326 ◽  
pp. 04003
Author(s):  
Chong Gao ◽  
Zhongyu Jiang ◽  
Zhenshan Liu ◽  
Pizhi Zhao ◽  
Ruiyin Huang ◽  
...  
Keyword(s):  
Surface Layer ◽  
Sulfuric Acid ◽  
Single Crystal ◽  
Aluminium Alloy ◽  
Formation Mechanism ◽  
Grain Orientation ◽  
Surface Brightness ◽  
Aluminium Substrate ◽  
Normal Zone ◽  
Lower Porosity

Processed by sulfuric acid anodizing, several unexpected strip defects exhibited on the anodizing film of AA5252 aluminium alloy sheets. Their formation mechanism was studied in detail. The normal zone and strip zone were compared, with respect to surface brightness, porosity of anodizing film, and microstructures of the corresponding aluminium substrate tested by spectroscopic colorimeter and SEM, and SEM-EBSD. Results showed that the brightness of strip zone was lower than that of normal zone. Additionally, compared with normal zone, the porosity of anodizing film was higher, and cubic grains fewer, which located in the corresponding surface layer of aluminium substrate in strip zone. In order to further clarify the effect of grain orientation on the brightness of anodizing film, single crystal aluminium sheet with (100), (110) or (111) orientation was anodized. Results showed that the anodized (100) oriented specimen, i.e., cubic grain was brighter, whose anodizing film had lower porosity, compared with (110) and (111) oriented ones. Therefore, the formation mechanism of strip defects was proposed as uneven distribution of cubic grains. The zones with fewer cubic orientated grains were darker, and were visible as strip defects after anodizing.

Chip Formation Mechanism in Single Crystal Cutting of β-Brass

CIRP Annals ◽  
1980 ◽  
Vol 29 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Kanji Ueda ◽  
Kazuaki Iwata ◽  
Kazuo Nakayama
Keyword(s):  
Single Crystal ◽  
Formation Mechanism ◽  
Chip Formation ◽  
Chip Formation Mechanism
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