Metastable Crystalline Phases Synthesized by Ion Beam Mixing in Some Nb-Based Binary Metal Systems

1993 ◽  
Vol 316 ◽  
Author(s):  
B.X. Liu ◽  
Z.J. Zhang
Keyword(s):  
Free Energy ◽  
Solid Solutions ◽  
Room Temperature ◽  
Ion Beam ◽  
Multilayered Films ◽  
Ion Beam Mixing ◽  
Energy Diagram ◽  
Calculated Diagram ◽  
Free Energy Diagram ◽  
Step Transition

ABSTRACTIn the Nb-rich Nb-Fe(Co,Ni) multilayered films, two metastable crystalline (MX) phases of hep and fee structures were formed by room temperature 200 keV xenon ion mixing. The phase formation was through a two-step transition, Le. a first shearing of bcc—>hcp and then a sliding of hep—>fcc. The free energy curves of the observed MX phases were calculated and included into the free energy diagram together with those of the terminal solid solutions, the amorphous phase and the equilibrium intermetaШc compounds. An independent comparative thermal annealing experiment was conducted with the corresponding as-deposited multilayers and the results certified the emerging sequence of the MX phases being exactly the same as the calculated diagram predicted. Moreover, a crystallographic model was figured out for the bec—>hcp—>fcc transition and the resultant lattice parameters agreed well with the experimental ones.

Cu-Zr-Nb Crystalline-Amorphous Composites Investigated by Thermodynamic Calculation and Ion Beam Mixing Experiments

2013 ◽  
Vol 745-746 ◽  
pp. 793-798
Author(s):  
S.H. Liang ◽  
T.L. Wang ◽  
X. Bai ◽  
J.H. Li
Keyword(s):  
Metallic Glass ◽  
Amorphous Phase ◽  
Solid Solutions ◽  
Metallic Glasses ◽  
Thermodynamic Calculation ◽  
Ion Beam ◽  
Multilayered Films ◽  
Ion Beam Mixing ◽  
Supersaturated Solid Solutions

The formation of Cu-Zr-Nb metallic glass was predicted by thermodynamic calculation and then five Cu-Zr-Nb ternary metallic multilayered films were designed and prepared by electron depositing. The metastable supersaturated solid solutions, amorphous phase as well as their composites were able to be obtained in these Cu-Zr-Nb metallic multilayered films upon ion beam mixing. The observations provided a clew to improve the ductibility of the metallic glasses. Some possible interpretations were presented concerning the formation of the crystalline-amorphous composite.

A Universal Approach To Determine the Free Energy Diagram of an Electrocatalytic Reaction

ACS Catalysis ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 1864-1879 ◽  
Author(s):  
Kai S. Exner ◽  
Iman Sohrabnejad-Eskan ◽  
Herbert Over
Keyword(s):  
Free Energy ◽  
Energy Diagram ◽  
Universal Approach ◽  
Free Energy Diagram ◽  
Electrocatalytic Reaction

The Free Energy Diagram of the Vanadium-Oxygen System

1951 ◽  
Vol 98 (11) ◽  
pp. 417 ◽  
Author(s):  
N. P. Allen ◽  
O. Kubaschewski ◽  
O. von Goldbeck
Keyword(s):  
Free Energy ◽  
Energy Diagram ◽  
Oxygen System ◽  
Free Energy Diagram

Full Free Energy Diagram of an Electrocatalytic Reaction over a Single-Crystalline Model Electrode

2017 ◽  
Vol 4 (11) ◽  
pp. 2902-2908 ◽  
Author(s):  
Kai S. Exner ◽  
Iman Sohrabnejad-Eskan ◽  
Josef Anton ◽  
Timo Jacob ◽  
Herbert Over
Keyword(s):  
Free Energy ◽  
Energy Diagram ◽  
Single Crystalline ◽  
Free Energy Diagram ◽  
Electrocatalytic Reaction

Formation and Transformation of Amorphous Silicide Alloys

1983 ◽  
Vol 31 ◽  
Author(s):  
K.N. Tu ◽  
T. Tien ◽  
S.R. Herd
Keyword(s):  
Vapor Deposition ◽  
Room Temperature ◽  
Ion Beam ◽  
Conductivity Measurement ◽  
Rapid Quenching ◽  
Slow Heating ◽  
Electrical Conductivity Measurement ◽  
Ion Beam Mixing ◽  
Transmission Electron ◽  
Amorphous Si

ABSTRACTAmorphous silicide films can be formed by rapid quenching using techniques of vapor deposition and ion beam mixing and also by slow heating using solid state interdiffusion and reaction. For example, amorphous TaSi2 films can be formed by sputtering or dual electron guns co-deposition. Amorphous Pt2Si3 films have been produced by mixing PtSi and Si at room temperature with an ion beam at about 100 to 300keV. Recently, an amorphous Rh-Si alloy phase has been made by slowly heating to 300°C a very thin crystalline Rh films (∼50Å) on amorphous Si. The formation and crystallization behavior of these amorphous silicide alloys has been studied by transmission electron microscopy and electrical conductivity measurement.

Ar+ Induced Interfacial Mixinc in the Pd/Cu Bilayer System

1989 ◽  
Vol 157 ◽  
Author(s):  
H.K. Kim ◽  
J.H. Song ◽  
S.K. Kim ◽  
K. Jeong ◽  
C.N. Whang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Ion Beam ◽  
Layer By Layer ◽  
Ion Beam Mixing ◽  
Enhanced Diffusion ◽  
Bilayer System ◽  
Radiation Enhanced Diffusion

ABSTRACTIon beam mixing of a Pd/Cu bilayer is studied using irradiation with 80 keV Ar+ ions at room temperature. RBS analysis shows that intermixing has occurred across the Pd/Cu interface, and that the mixing amount increases with increasing ion dose, which agrees well with a model for radiation enhanced diffusion. It is found that the Cu3Pd phase grows in a layer-by-layer manner.

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