Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Microstructure and Hardness of Scandium Trialuminide with Ternary Rare-Earth Additions
View through CrossRef
The microstructure of ternary Al3(Sc1-yREy) intermetallic compounds (where RE is one of
the rare-earth elements La, Ce, Nd, Sm, Eu, Yb or Lu), was investigated as a function of RE
concentration for 0<y≤0.75. Alloys with La, Ce, Nd, Sm or Eu additions consist of a L12 phase
containing a dendritic second phase with D019 (La, Ce, Nd, Sm) or C11b (Eu) structure. Alloys with
Yb or Lu additions show a single L12 phase. The RE solubility limits at 1373 K in the
L12-Al3(Sc1-yREy) phase are very low for La, Nd, Ce and Eu (0.08-0.41 at.% or y=0.0032-0.0164),
low for Sm (3.22 at.% or y=0.1288) and complete for Yb and Lu. The lattice parameter of the L12
solid-solution increases linearly with RE concentration and the magnitude of this effect is correlated
with the atomic size mismatch between Sc and the RE elements. The Vickers micro-hardness of the
L12 solid-solution increases linearly with increasing RE concentration.
Title: Microstructure and Hardness of Scandium Trialuminide with Ternary Rare-Earth Additions
Description:
The microstructure of ternary Al3(Sc1-yREy) intermetallic compounds (where RE is one of
the rare-earth elements La, Ce, Nd, Sm, Eu, Yb or Lu), was investigated as a function of RE
concentration for 0<y≤0.
75.
Alloys with La, Ce, Nd, Sm or Eu additions consist of a L12 phase
containing a dendritic second phase with D019 (La, Ce, Nd, Sm) or C11b (Eu) structure.
Alloys with
Yb or Lu additions show a single L12 phase.
The RE solubility limits at 1373 K in the
L12-Al3(Sc1-yREy) phase are very low for La, Nd, Ce and Eu (0.
08-0.
41 at.
% or y=0.
0032-0.
0164),
low for Sm (3.
22 at.
% or y=0.
1288) and complete for Yb and Lu.
The lattice parameter of the L12
solid-solution increases linearly with RE concentration and the magnitude of this effect is correlated
with the atomic size mismatch between Sc and the RE elements.
The Vickers micro-hardness of the
L12 solid-solution increases linearly with increasing RE concentration.
Related Results
Theia can arrive late and be oxidized, but not if it is large compared to proto-Earth
Theia can arrive late and be oxidized, but not if it is large compared to proto-Earth
The Moon-forming impact was the most significant event during the accretion of Earth substantially establishing the physical and chemical states of the Earth-Moon system. In the ca...
The Lanthanides, Rare Earth Metals
The Lanthanides, Rare Earth Metals
AbstractThe lanthanides (or lanthanons) are a group of 15 elements of atomic numbers from 57 through 71 in which scandium (atomic number 21) and yttrium (atomic number 39) are some...
The Lanthanides, Rare Earth Elements
The Lanthanides, Rare Earth Elements
AbstractThe lanthanides (or lanthanons) are a group of 15 elements of atomic numbers from 57 through 71 in which scandium (atomic number 21) and yttrium (atomic number 39) are some...
Associative Ternary Algebras and Ternary Lie Algebras at Cube Roots of Unity
Associative Ternary Algebras and Ternary Lie Algebras at Cube Roots of Unity
We propose an approach to extending the concept of a Lie algebra to ternary structures based on ω-symmetry, where ω is a primitive cube root of unity. We give a definition of a cor...
Associative Ternary Algebras and Ternary Lie Algebras at Cube Roots of Unity
Associative Ternary Algebras and Ternary Lie Algebras at Cube Roots of Unity
We propose an approach to extend the concept of a Lie algebra to ternary structures based on ω-symmetry, where ω is a primitive cube root of unity. We give a definition of a corres...
Scandium extraction from multicomponent systems by crystallization of complex sulfates
Scandium extraction from multicomponent systems by crystallization of complex sulfates
Abstract
Red mud generated from alumina production is one of the most promising scandium resources. Leaching for concentrating scandium and other valuable metals is ...
Improving mechanical properties of 2219 aluminium alloy GTA welds by scandium addition
Improving mechanical properties of 2219 aluminium alloy GTA welds by scandium addition
The effect of scandium additions to 2219 aluminium alloy weld metal has been investigated. At low levels (0·16%) of scandium, in spite of grain refinement in the weld metal, improv...
Crystallization and solubility of KSc(SO) for improving the efficiency of scandium extraction
Crystallization and solubility of KSc(SO) for improving the efficiency of scandium extraction
In the development of methods for the efficient extraction and concentration of rare earth elements (REE), as well as for the removal of impurities of related metals, the solubilit...