scholarly journals Deformation-induced reaction diffusion of Cu/Al multilayered composite by rolling at room temperature

2016 ◽  
Vol 46 (11) ◽  
pp. 1166-1174
Author(s):  
JunLong QI ◽  
QingBo YU ◽  
Ying SUN ◽  
XiangHua LIU
Keyword(s):  
Room Temperature ◽  
Reaction Diffusion ◽  
Multilayered Composite ◽  
Induced Reaction

Photochemically Induced C-H Bond Activation and Ligand Transfer in the Reaction of [Cp2Rh2(CO)(CF3C2CF3)] With [(Cp′) Mn (CO)2( thf )]: Structural Characterization of the Rh4 Product

1994 ◽  
Vol 47 (8) ◽  
pp. 1613 ◽  
Author(s):  
RS Dickson ◽  
MJ Liddell ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Room Temperature ◽  
Bond Activation ◽  
X Ray Diffraction ◽  
Full Matrix ◽  
X Ray ◽  
Corrected Data ◽  
Ligand Transfer ◽  
Hydrocarbon Solution ◽  
Induced Reaction

A room-temperature single-crystal X-ray diffraction study carried out on a product of a sunlight induced reaction between [Cp2Rh2(CO)(CF3C2CF3)] and [(Cp′) Mn (CO)2( thf )] in 2:1 ratio in hydrocarbon solution establishes it to be tetranuclear [(Cp4Rh4)(CF3C=CHCF3)2(CH3-C5H3)]; crystals of the latter are triclinic, Pī , a 15.803(9), b 13.445(8), c 8.966(6) Ǻ, α 75.92(5), β 80.68(5), γ 65.46(4)°, Z = 2. Full-matrix refinement for 3431 'observed' [I > 3σ(I)], absorption-corrected data converged at R 0.056. The structure comprises a pair of enantiomeric [(Cp2Rh2)(CF3C=CHCF3 binuclear units unsymmetrically linked by the central CH3C5H3 ring, by way of the η1,η2-C=CH and η1,η2-C= CMe functionalities.

Stochastic simulation of fluctuation-induced reaction-diffusion kinetics governed by Smoluchowski equations

2015 ◽  
Vol 21 (1) ◽  
Author(s):  
Karl K. Sabelfeld ◽  
Alexander I. Levykin ◽  
Anastasiya E. Kireeva
Keyword(s):  
First Passage Time ◽  
Reaction Diffusion ◽  
Passage Time ◽  
Initial Distribution ◽  
Stochastic Algorithm ◽  
Diffusion Kinetics ◽  
Reaction Conditions ◽  
Segregation Effect ◽  
Smoluchowski Equations ◽  
Induced Reaction

AbstractA stochastic algorithm for simulation of fluctuation-induced reaction-diffusion kinetics is presented and further developed following our previous study [J. Math. Chem. (2015), DOI 10.1007/s10910-014-0446-6] where this method was used to describe the annihilation of spatially separate electrons and holes in a disordered semiconductor. This model is based on the spatially inhomogeneous, nonlinear Smoluchowski equations with random initial distribution density. Here we focus on the spatial distribution of the reactants, and study the segregation effect which we have found under certain reaction conditions. In addition, to extend simulations on large samples we implemented the method in the cellular-automata framework interpreted as a stochastic interacting particles system in discrete but randomly progressed time instances. We have suggested a first passage time technique to characterize the clustering of electrons and holes, which seems to be quite convenient and informative instrument also in more general processes when there is a need to analyze the segregation phenomena.

Interface and Damping Capacity of Mg/Al Multilayered Composite Produced by Accumulative Roll Bonding

2016 ◽  
Vol 849 ◽  
pp. 838-843 ◽  
Author(s):  
Zhong Ming Liu ◽  
Hong Mei Chen ◽  
Wei Peng Guo ◽  
Jing Zhang ◽  
Yun Xue Jin
Keyword(s):  
Accumulative Roll Bonding ◽  
Room Temperature ◽  
Peak Height ◽  
Mg Alloy ◽  
Damping Capacity ◽  
Al Alloy ◽  
Roll Bonding ◽  
Multilayered Composite ◽  
Diffusion Layers ◽  
Multilayered Composites

Mg/Al alloy multilayered composites were produced by accumulative roll bonding (ARB) technique. The microstructures of Al and Mg alloy layers were characterized by scanning electron microscopy, and damping capacity of the composite was tested by dynamic mechanical analyzer.It can be found that the diffusion layers were produced in Al and Mg alloy layers, and the diffusion layers increased with increasing of the ARB pass. With the increasing of ARB pass, the room temperature damping value of Mg/A1 multilayered composite presented a downward trend. The temperature damping spectrum of the composite had two internal friction peaks, with the increasing of the ARB pass, the peak height of P1 peak increased gradually and P2 peak moved to low temperature gradually.

Mechanically induced reaction between alkaline earth metal oxides and TiO2

1998 ◽  
Vol 13 (6) ◽  
pp. 1607-1613 ◽  
Author(s):  
N. J. Welham
Keyword(s):  
Metal Oxides ◽  
Alkaline Earth ◽  
Room Temperature ◽  
Lattice Strain ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Alkaline Earth Metal Oxides ◽  
Induced Reaction

This paper outlines the formation of alkaline earth metal titanates, of the general formula MTiO3, directly from the metal oxides and rutile by mechanical activation in a laboratory ball mill at room temperature. X-ray diffraction analysis showed that the reaction was essentially complete within 100 h for all metals except magnesium. The titanates formed all had a Scherrer crystallite size of 11–12 nm and a lattice strain of 0.5–0.6%, neither of which were affected by extended milling. Annealing studies confirmed that the titanate was formed during milling and showed that grain growth could be achieved at temperatures below that generally used for their formation. Mixed cation titanates could also be formed by milling, but tended to be barium rich until annealed.

Role of reaction media in "green" radiation-induced polymerization of white phosphorus

2009 ◽  
Vol 81 (11) ◽  
pp. 2115-2122 ◽  
Author(s):  
Natalia P. Tarasova ◽  
Yury V. Smetannikov ◽  
Alexander S. Vilesov ◽  
Alexey A. Zanin
Keyword(s):  
Ionic Liquids ◽  
Dimethyl Sulfoxide ◽  
Room Temperature ◽  
White Phosphorus ◽  
Phosphorus Containing ◽  
Radiation Induced ◽  
Reaction Media ◽  
Induced Reaction ◽  
Green Radiation

Phosphorus-containing polymers were synthesized using a "green" radiation-induced reaction at room temperature in the presence of ionic liquids (ILs). The nature of ILs allowed us to adjust the properties of reaction media (dimethyl sulfoxide, DMSO–benzene solvents). The effects of various factors on the efficiency of the synthesis of phosphorus-containing polymers are discussed.

An interesting azirine induced reaction of the cyclopentadienyliron dicarbonyl dimer

1979 ◽  
Vol 57 (12) ◽  
pp. 1541-1543 ◽  
Author(s):  
Howard Alper ◽  
Tsutomu Sakakibara
Keyword(s):  
Iron Atom ◽  
Anhydrous Benzene ◽  
Room Temperature ◽  
Induced Reaction

Reaction of cyclopentadienyliron dicarbonyl dimer with a series of 2-arylazirines in anhydrous benzene (room temperature or 40 °C, 41–96 h) affords cycloaddition products (pyrazines, isoxazoles) and the dimer of cyclopentadienone (1,8-diketo-4,7-methano-3a,4,7,7a-tetrahydroindene). The formation of the latter product is proposed to occur via a complex in which each cyclopentadienyl ring is π-complexed to one iron atom and σ-bound to another.

Dependence of Intergranular Fracture on Boundary Topography and Cohesion

1973 ◽  
Vol 31 ◽  
pp. 150-151
Author(s):  
J. E. Doherty ◽  
A. F. Giamei ◽  
B. H. Kear ◽  
C. W. Steinke
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Boundary Shear ◽  
Room Temperature Ductility ◽  
Solid Solution Matrix ◽  
Nickel Base ◽  
Solution Matrix ◽  
Different Levels ◽  
Base Superalloy

Recently we have been investigating a class of nickel-base superalloys which possess substantial room temperature ductility. This improvement in ductility is directly related to improvements in grain boundary strength due to increased boundary cohesion through control of detrimental impurities and improved boundary shear strength by controlled grain boundary micros true tures.For these investigations an experimental nickel-base superalloy was doped with different levels of sulphur impurity. The micros tructure after a heat treatment of 1360°C for 2 hr, 1200°C for 16 hr consists of coherent precipitates of γ’ Ni3(Al,X) in a nickel solid solution matrix.

Hepatocyte Alterations in Guinea Pigs FED Polychlorinated Biphenyls (PCBs), Dibenzodioxins (PCDD), AND DIBENZOFURANS (PCDF)

1982 ◽  
Vol 40 ◽  
pp. 56-57
Author(s):  
J. N. Turner ◽  
D. N. Collins
Keyword(s):  
Guinea Pigs ◽  
Room Temperature ◽  
Dose Group ◽  
Methyl Cellulose ◽  
Uranyl Acetate ◽  
Target Organ ◽  
Office Building ◽  
Lead Citrate ◽  
Control Groups ◽  
Cooling Fluid

A fire involving an electric service transformer and its cooling fluid, a mixture of PCBs and chlorinated benzenes, contaminated an office building with a fine soot. Chemical analysis showed PCDDs and PCDFs including the highly toxic tetra isomers. Guinea pigs were chosen as an experimental animal to test the soot's toxicity because of their sensitivity to these compounds, and the liver was examined because it is a target organ. The soot was suspended in 0.75% methyl cellulose and administered in a single dose by gavage at levels of 1,10,100, and 500mgm soot/kgm body weight. Each dose group was composed of 6 males and 6 females. Control groups included 12 (6 male, 6 female) animals fed activated carbon in methyl cellulose, 6 males fed methyl cellulose, and 16 males and 10 females untreated. The guinea pigs were sacrificed at 42 days by suffocation in CO2. Liver samples were immediately immersed and minced in 2% gluteraldehyde in cacadylate buffer at pH 7.4 and 4°C. After overnight fixation, samples were postfixed in 1% OsO4 in cacodylate for 1 hr at room temperature, embedded in epon, sectioned and stained with uranyl acetate and lead citrate.

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