Modification of interface chemistry and slag structure by transition element Cr

2021 ◽  
Author(s):  
Xiaobo He ◽  
Lijun Wang ◽  
Kuochih Chou
Keyword(s):  
Transition Element ◽  
Interface Chemistry ◽  
Slag Structure

Generation of 4H and 6H Structures During the Hexagonal-Rhombohedral Transformation in Dy2Co17

1975 ◽  
Vol 33 ◽  
pp. 38-39
Author(s):  
C. W. Allen ◽  
D. L. Kuruzar
Keyword(s):  
Elevated Temperatures ◽  
Layer Structure ◽  
Transition Element ◽  
Temperature Structure ◽  
Allotropic Transformation ◽  
Layer Plane ◽  
Planar Defects ◽  
Topologically Close Packed ◽  
Transformation Mechanisms ◽  
Shear Transformation

The rare earth/transition element intermetallics R2T17 are essentially topologically close packed phases for which layer structure models have already been presented. Many of these compounds are known to undergo allotropic transformation of the type at elevated temperatures. It is not unexpected that shear transformation mechanisms are involved in view of the layering character of the structures. The transformations are evidently quite sluggish, illustrated in furnace cooled Dy2Co17 by the fact that only rarely has the low temperature rhombohedral form been seen. The more usual structures observed so far in furnace cooled alloys include 4H and 6H in Dy2Co17 (Figs. 1 and 2) . In any event it is quite clear that the general microstructure is very complicated as a consequence of the allotropy, illustrated in Fig. 3. Numerous planar defects in the layer plane orientation are evident as are non-layer plane defects inherited from a high temperature structure.

Is a Non-Transition Element Nitride Ferromagnet Ever Achievable? Indication of the N-N Pairing Instability

2006 ◽  
Vol 71 (11-12) ◽  
pp. 1525-1531 ◽  
Author(s):  
Wojciech Grochala
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Transition Element ◽  
Density Functional Theory Calculations ◽  
Functional Theory

The enthalpy of four polymorphs of CaN has been scrutinized at 0 and 100 GPa using density functional theory calculations. It is shown that structures of diamagnetic calcium diazenide (Ca2N2) are preferred over the cubic ferromagnetic polymorph (CaN) postulated before, both at 0 and 100 GPa.

Examination of optical properties of YbFeO3 films via doping transition element osmium

2020 ◽  
Vol 105 ◽  
pp. 109911 ◽  
Author(s):  
O. Polat ◽  
M. Caglar ◽  
F.M. Coskun ◽  
D. Sobola ◽  
M. Konečný ◽  
...  
Keyword(s):  
Optical Properties ◽  
Transition Element

Molten Slag Structure and Diffusion Coefficients of Cr3+ and Si4+ during Micro-Carbon Cr-Fe Alloy Production

2011 ◽  
Vol 79 ◽  
pp. 77-82
Author(s):  
Yi Min ◽  
Jian Huang ◽  
Cheng Jun Liu ◽  
Mao Fa Jiang
Keyword(s):  
Diffusion Coefficient ◽  
Diffusion Coefficients ◽  
Molten Slag ◽  
Optimization Method ◽  
Structure Theory ◽  
Average Diffusion Coefficient ◽  
Slag Structure ◽  
Initial Stage ◽  
Silicate Structure ◽  
Average Diffusion

Based on the silicate structure theory, the molten slag structure and the existential state of and during micro-carbon Cr-Fe alloy production process were analysised, and then their diffusion coefficients were calculated. The results showed that, during the initial stage, the average diffusion coeffecient of and is close to the , the reaction process is controlled by the diffusion of () and corporately, during the later stage, the diffusion coefficient of is less than average diffusion coefficient of and , the controlling step is the diffusion of . According to the evolution of diffusion coefficient, molten slag composition optimization method was advised to increase the diffusion ability of and for enhancing the reaction efficiency and the recovery rate of chromium.

scholarly journals Crystallographic and structural characterization of heterometallic platinum complexes Part VI. Heterohexanuclear complexes

2014 ◽  
Vol 12 (11) ◽  
pp. 1101-1126 ◽  
Author(s):  
Milan Melník ◽  
Peter Mikuš ◽  
Clive Holloway
Keyword(s):  
Metal Ion ◽  
Structural Parameters ◽  
Bond Distance ◽  
Transition Element ◽  
Platinum Complexes ◽  
Hard Metals ◽  
Wide Range ◽  
Platinum Clusters ◽  
Soft Metal ◽  
Independent Molecules

AbstractThis review classifies and analyzes heterohexanuclear platinum clusters into seven types of metal combinations:Pt5M, Pt4M2, Pt3M3, Pt2M4, PtM5, Pt2M3M′, and Pt2M2M2′. The crystals of these clusters generally belong to six crystal classes: monoclinic, triclinic, orthorhombic, tetragonal, trigonal and cubic. Among the wide range of stereochemistry adopted by these clusters, octahedral and capped square-pyramidal are the most common. Although platinum is classified as a soft metal atom, it bonds to a variety of soft, borderline and hard metals. Nineteen different heterometal ions are involved in hexanuclear platinum clusters. The shortest Pt-M bond distance in the case of M being a non-transition element is 2.395(4) Å for germanium and for M being a transition metal ion it is 2.402(2) Å for Cobalt. The shortest Pt-Pt bond distance observed in these clusters is 2.532 Å. Several relationships between the structural parameters are identified and discussed. Some clusters exist in two isomeric forms and some show crystallographically independent molecules within the same crystal. Such isomers and independent molecules are examples of distortion isomerism.

Incorporation of Nitrogen Atoms at Si/SiO2 Interfaces of Field Effect Transistors (FETs) to Improve Device Reliability

1995 ◽  
Vol 405 ◽  
Author(s):  
G. Lucovsky ◽  
D. R. Lee ◽  
Z. Jing ◽  
J. L. Whitten ◽  
C. Parker ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Scale Model ◽  
Budget Process ◽  
Interface Chemistry ◽  
Device Reliability ◽  
On Line ◽  
Low Thermal Budget ◽  
Device Properties ◽  
Improve Device

AbstractIncorporation of N-atoms at the Si-Si02 interface in field effect transistors, FETs, with ultrathin dielectrics (≤ 5.5 nm) improves device reliability. Four aspects of our recent research on nitrided Si-Si02 interfaces are discussed in this paper: i) the low-temperature/low-thermal budget process by which interface chemistry is controlled, and optimized; ii) the use of on-line and off-line diagnostics to determine the spatial confinement and concentration of interfacial N-atom incorporation; iii) comparisons of device properties for non-nitrided and nitrided interfaces; and iv) the proposal of an atom-scale model for the role that interfacial N-atoms play in improving device reliability.

Effect of MnO content on slag structure and properties under different basicity conditions: a molecular dynamics study

2021 ◽  
pp. 116304
Author(s):  
Shufang Ma ◽  
Kejiang Li ◽  
Jianliang Zhang ◽  
Chunhe Jiang ◽  
Zhisheng Bi ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Structure And Properties ◽  
Slag Structure
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