FACE-CENTERED CUBIC COBALT-RICH SOLID SOLUTIONS IN BINARY ALLOYS WITH ALUMINUM, GALLIUM, SILICON, GERMANIUM, AND TIN

By rapidly cooling liquid alloys, single-phase face-centered cubic cobalt-rich solid solutions have been obtained with up to 17.2 at.% aluminum, 18.2 at.% gallium, 13 at.% silicon, 17.4 at.% germanium, and 5 at.% tin. With the exception of silicon, these limits of solubility exceed those found under equilibrium conditions. The variation of lattice parameter with composition has been measured and the data can be fitted with straight lines for all solute elements except gallium, in which a change of slope is observed at 13.2 at.%.

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NICKEL-RICH SOLID SOLUTIONS IN BINARY ALLOYS WITH TIN, GERMANIUM, AND SILICON

Canadian Journal of Physics ◽

10.1139/p62-147 ◽

1962 ◽

Vol 40 (10) ◽

pp. 1397-1400 ◽

Cited By ~ 45

Author(s):

W. Klement Jr.

Keyword(s):

Solid Solutions ◽

Single Phase ◽

Binary Alloys ◽

Phase Region ◽

Lattice Parameters ◽

Liquid Alloys ◽

Solute Content ◽

Single Phase Region ◽

Cooling Liquid ◽

Metastable Structures

By rapidly cooling liquid alloys, single-phase nickel-rich solid solutions have been obtained to [Formula: see text] at.% tin, ~20 at.% germanium, and [Formula: see text] at.% silicon. The lattice parameters measured for the metastable structures as well as for some alloys within the equilibrium single-phase region suggest linear variations with solute content, with slopes (in units of 10−3 Å/at.% solute) of +8.5 for tin, +1.94 for germanium, and −0.55 for silicon.

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Structural Study on Nano-crystals of Spinel Mgx-Zn1-X-Fe2O4 Ferrite with and without Calcination

High Temperature Materials and Processes ◽

10.1515/htmp-2016-0037 ◽

2018 ◽

Vol 37 (1) ◽

pp. 89-95 ◽

Cited By ~ 1

Author(s):

M. Shafa ◽

M.Y. Naz ◽

M.R. Ahmad ◽

Y. Khan ◽

A. Ghaffar

Keyword(s):

Single Phase ◽

Lattice Parameter ◽

Initial Increase ◽

Face Centered Cubic ◽

X Ray ◽

Phase Spinel ◽

Face Centered ◽

Xrd Patterns ◽

Co Precipitation ◽

Welding Processes

AbstractThis study investigated a series of single phase Mgx-Zn1-x-Fe2O4 spinel ferrites, prepared using co-precipitation technique and sintered at 600 °C. The X-ray diffraction (XRD) patterns of the ferrite samples revealed the formation of impurity free single phase spinel structures. The formation of ferrite phases and face centered cubic structures was confirmed at Bragg angles of 35.9°, 54.3° and 62.7°. The lattice parameter increased with an increase in ‘x’ content in the ferrite composition. The grain size, estimated from SEM micrographs, was found in the range of 0.5–2 mµ. The lattice parameter of the ferrite samples exhibited an initial increase upto a certain extent, thereafter suddenly dropped down due to fracturing and re-welding processes. Overall, the lattice parameter ‘a’ varied from 0.80 to 0.85 nm, crystallite size from 34 to 80 nm, unit cell volume from 0.528 × 10−21 to 0.62 × 10−21 cm3 and X-ray density from 5.8 to 4.5 g/cm3.

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Irradiation Behaviors in BCC Multi-Component Alloys with Different Lattice Distortions

Metals ◽

10.3390/met11050706 ◽

2021 ◽

Vol 11 (5) ◽

pp. 706

Author(s):

Yue Su ◽

Songqin Xia ◽

Jia Huang ◽

Qingyuan Liu ◽

Haocheng Liu ◽

...

Keyword(s):

Single Phase ◽

Vacuum Arc ◽

Face Centered Cubic ◽

Body Centered Cubic ◽

Chemical Complexity ◽

Arc Melting ◽

Vacuum Arc Melting ◽

Lattice Distortions ◽

Face Centered ◽

Displacement Per Atom

Recently, the irradiation behaviors of multi-component alloys have stimulated an increasing interest due to their ability to suppress the growth of irradiation defects, though the mostly studied alloys are limited to face centered cubic (fcc) structured multi-component alloys. In this work, two single-phase body centered cubic (bcc) structured multi-component alloys (CrFeV, AlCrFeV) with different lattice distortions were prepared by vacuum arc melting, and the reference of α-Fe was also prepared. After 6 MeV Au ions irradiation to over 100 dpa (displacement per atom) at 500 °C, the bcc structured CrFeV and AlCrFeV exhibited significantly improved irradiation swelling resistance compared to α-Fe, especially AlCrFeV. The AlCrFeV alloy possesses superior swelling resistance, showing no voids compared to α-Fe and CrFeV alloy, and scarce irradiation softening appears in AlCrFeV. Owing to their chemical complexity, it is believed that the multi-component alloys under irradiation have more defect recombination and less damage accumulation. Accordingly, we discuss the origin of irradiation resistance and the Al effect in the studied bcc structured multi-component alloys.

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The Examination of Calcium ion Implanted Alumina with Energy Filtered Transmission Electron Microscopy

Microscopy and Microanalysis ◽

10.1017/s1431927600008953 ◽

1997 ◽

Vol 3 (S2) ◽

pp. 413-414

Author(s):

E.M. Hunt ◽

J.M. Hampikian ◽

N.D. Evans

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Pure Aluminum ◽

Lattice Parameter ◽

Face Centered Cubic ◽

Ion Channeling ◽

Transmission Electron ◽

Knoop Microhardness ◽

Aluminum Nanocrystals ◽

Face Centered

Ion implantation can be used to alter the optical response of insulators through the formation of embedded nano-sized particles. Single crystal alumina has been implanted at ambient temperature with 50 keV Ca+ to a fluence of 5 x 1016 ions/cm2. Ion channeling, Knoop microhardness measurements, and transmission electron microscopy (TEM) indicate that the alumina surface layer was amorphized by the implant. TEM also revealed nano-sized crystals ≈7 - 8 nm in diameter as seen in Figure 1. These nanocrystals are randomly oriented, and exhibit a face-centered cubic structure (FCC) with a lattice parameter of 0.409 nm ± 0.002 nm. The similarity between this crystallography and that of pure aluminum (which is FCC with a lattice parameter of 0.404 nm) suggests that they are metallic aluminum nanocrystals with a slightly dilated lattice parameter, possibly due to the incorporation of a small amount of calcium.Energy-filtered transmission electron microscopy (EFTEM) provides an avenue by which to confirm the metallic nature of the aluminum involved in the nanocrystals.

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