The transition from the formation of mixed scales to the selective oxidation of the most-reactive component in the corrosion of single and two-phase binary alloys

1993 ◽  
Vol 40 (3-4) ◽  
pp. 373-393 ◽  
Author(s):  
F. Gesmundo ◽  
F. Viani ◽  
Y. Niu ◽  
D. L. Douglass
Keyword(s):  
Selective Oxidation ◽  
Binary Alloys ◽  
Two Phase ◽  
Reactive Component

The steady-State corrosion kinetics of two-phase binary alloys forming the most-stable oxide

1996 ◽  
Vol 46 (5-6) ◽  
pp. 383-398 ◽  
Author(s):  
F. Gesmundo ◽  
P. Castello ◽  
F. Viani
Keyword(s):  
Steady State ◽  
Binary Alloys ◽  
Two Phase ◽  
Stable Oxide ◽  
Corrosion Kinetics ◽  
Kinetics Of

Heat Capacity in Two-Phase Regions and Heat of Phase Transformations of Certain Zr-Nb Binary Alloys

Atomic Energy ◽  
2005 ◽  
Vol 99 (1) ◽  
pp. 451-463 ◽  
Author(s):  
S. G. Popov ◽  
V. N. Proselkov
Keyword(s):  
Heat Capacity ◽  
Phase Transformations ◽  
Binary Alloys ◽  
Two Phase

High-Temperature Materials Based on Quaternary Ir-Nb-Ni-Al Alloys

2000 ◽  
Vol 646 ◽  
Author(s):  
X. Yu ◽  
Y. Yamabe-Mitarai ◽  
Y. Ro ◽  
S. Nakaza ◽  
H. Harada
Keyword(s):  
Coherent Structures ◽  
Binary Alloys ◽  
Lattice Misfit ◽  
Al Alloys ◽  
Quaternary Alloys ◽  
Rich Region ◽  
Two Phase ◽  
High Temperature Materials ◽  
Novel Method ◽  
Potential Use

ABSTRACTA novel method to develop new quaternary alloys with an fcc/L12 coherent structure is proposed. This paper reviews the development of quaternary Ir-Nb-Ni-Al alloys. The microstructure, lattice misfit, and compressive 0.2% flow stress of 15 kinds of alloys were investigated systematically. Two kinds of coherent structures, fcc/L12-Ir3Nb and fcc/ L12-Ni3Al, were observed in most alloys. Two two-phase structures, fcc+L12-Ir3Nb and fcc+L12-Ni3Al, were observed in Ir-rich and Ni-rich regions, respectively. The lattice misfits of quaternary Ir-Nb-Ni-Al alloys were higher than those of Ni- or Ir-base binary alloys. The compressive 0.2% flow stresses of quaternary alloys increased dramatically compared with those of Ni-base superalloys. The quaternary alloys located in the Ir-rich region were not only had higher strength but also better ductility than Ir-base binary alloys. The potential use of quaternary alloys is discussed.

Selective oxidation of benzyl alcohol by two phase electrolysis using nitrate as mediator

2012 ◽  
Vol 2 (4) ◽  
pp. 824 ◽  
Author(s):  
C. Christopher ◽  
S. Lawrence ◽  
A. John Bosco ◽  
N. Xavier ◽  
S. Raja
Keyword(s):  
Benzyl Alcohol ◽  
Selective Oxidation ◽  
Two Phase ◽  
Oxidation Of Benzyl Alcohol

The internal oxidation of two-phase binary alloys under low oxidant pressures

1996 ◽  
Vol 45 (1-2) ◽  
pp. 51-76 ◽  
Author(s):  
Francesco Gesmundo ◽  
Furio Viani ◽  
Yan Niu
Keyword(s):  
Internal Oxidation ◽  
Binary Alloys ◽  
Two Phase ◽  
Low Oxidant Pressures

scholarly journals Influence of Grain Refinement on Oxidation Behavior of Two-Phase Cu–Cr Alloys at 973–1,073 K in Air

2016 ◽  
Vol 35 (10) ◽  
pp. 1005-1011
Author(s):  
T. J. Pan ◽  
J. Chen ◽  
Y. X. He ◽  
W. Wei ◽  
J. Hu
Keyword(s):  
Grain Size ◽  
Spatial Distribution ◽  
Oxidation Behavior ◽  
Second Phase ◽  
Two Phase ◽  
Reactive Component ◽  
Parabolic Law ◽  
Second Phase Particles ◽  
Kinetics Of ◽  
Lower Oxidation

AbstractThe oxidation behavior of grain-refined Cu–7.0 Cr alloy (GR Cu–7.0 Cr) in air at 973–1,073 K was investigated in comparison with normal casting Cu–7.0 Cr alloy (CA Cu–7.0 Cr). The oxidation of CA Cu–7.0 Cr alloy nearly followed parabolic law, while the oxidation kinetics of GR Cu–7.0 Cr slightly deviated from parabolic law. Both alloys almost produced multi-layered scales consisting of the outer layer of CuO and the inner layer of mixed Cr2O3 and Cu2O oxides plus internal oxidation zones of chromium. The grain-refined Cu–7.0 Cr alloy produced a more amount of Cr2O3 in the inner layer of the scale, and thus was oxidized at much lower oxidation rate than that of CA Cu–7.0 Cr with normal grain size. The experimental results indicated that the differences in oxidation behavior between two alloys may be ascribed to the different size and spatial distribution of the second-phase particles and the reactive component contents in localized zone.

scholarly journals Surface Layer Formed by Selective Oxidation in High-Purity Copper-Titanium Binary Alloys

2002 ◽  
Vol 43 (9) ◽  
pp. 2303-2308 ◽  
Author(s):  
Shigeru Suzuki ◽  
Kazutaka Hirabayashi ◽  
Kouji Mimura ◽  
Toru H. Okabe ◽  
Minoru Isshiki ◽  
...  
Keyword(s):  
Surface Layer ◽  
Selective Oxidation ◽  
High Purity ◽  
Binary Alloys ◽  
Purity Copper

Search for Nucleation of Phase Embryos in Binary Alloys by Impurity Atoms

2000 ◽  
Vol 55 (1-2) ◽  
pp. 129-133
Author(s):  
Gary S. Collins ◽  
Luke S.-J. Peng ◽  
Matthew O. Zacate
Keyword(s):  
Gamma Rays ◽  
Driving Force ◽  
Perturbed Angular Correlation ◽  
Binary Alloys ◽  
Alloy System ◽  
Two Phase ◽  
Impurity Atoms ◽  
Quadrupole Interactions ◽  
Phase Domain ◽  
Crystal Phases

A search was made to detect the possibility that individual impurity atoms in two-phase, binary alloys nucleate embryonic crystals. The alloy system studied was Ni-Al and the impurities were 111ln probe atoms. Local surroundings of the probes characteristic of the crystal phases were detected through quadrupole interactions with 111Cd daughter nuclei using the method of perturbed angular correlation of gamma rays. Analysis of site fractions of the probes led to two alternative interpretations that could not be distinguished on the basis of the present measurements: 1.) 111ln probes in the two-phase domain between Ni2Al3 and NiAl segregate to Ni2Al3 with a segregation energy of about 0.10 eV; or 2.) 111ln probes nucleate embryonic crystals of Ni2Al3, with the driving force for nucleation being an attraction between In atoms and Ni vacancies that is known to be strong in NiAl.

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