Formation Processes of Nanocomposite Strengthening Particles in Rapidly Quenched Al-Sc-Zr Alloys
| Authors | A.L. Berezina, T.O. Monastyrska, O.A. Molebny, V.K. Nosenko, A.V. Kotko |
| Affiliations | Institute for Metal Physics of the NAS of Ukraine, 36 Vernadsky Blvd., 03680 Kyiv, Ukraine |
| Е-mail | monast@imp.kiev.ua |
| Issue | Volume 4, Year 2012, Number 1 |
| Dates | Received 18 October 2011; revised manuscript received 23 February 2012; published online 14 March 2012 |
| Citation | A.L. Berezina, T.O. Monastyrska, O.A. Molebny et al. J. Nano-Electron. Phys. 4 No 1, 01006 (2012) |
| DOI | |
| PACS Number(s) | 4.70.dg, 81.07.Bc, 81.10.Fg |
| Keywords | Al-Sc, Al-Zr Al-Sc-Zr Alloys, The rapid quenching from the liquid State, Anomalous supersaturated solid solution, Decomposition of anomalously supersaturated solid solution, Nanocomposite Al3Zr/Al3Sc particles. |
| Annotation | Decomposition processes of supersaturated solid solution of aluminium alloys alloyed with Sc and Zr have been studied in the work. The binary hypereutectic Al-Sc alloys, hyperperitectic Al-Zr alloys and ternary Al-Sc-Zr alloys were chosen. Alloys were obtained by the melt-spinning. Melts were quenched from temperatures of Т = 1000 C and Т = 1400 ºC. The study of the structure of rapidly solidifyed binary Al alloys alloyed with Sc and Zr showed that the crystallization of anomalously supersaturated solid solution (Tquen. = 1400 ºC) or the crystallization with the formation of "fan" structure (Tquen. = 1000 ºC) are possible depending on the quenching temperature of the melt. The decomposition of anomalously supersaturated solid solution is continuous, with the precipitation of nano-sized spherical Al3X (X-Sc, Zr) particles of L12-ordered phase which is isomorphous to matrix. It was found that the loss of thermal stability of Al-Sc alloys is due to the loss of coherence of the strengthening Al3Sc phase. In Al-Zr alloys the loss of strength is due to the formation of a stable tetragonal DO23-ordered A13Zr phase. After co-alloying of Al by Sc and Zr a bimodal grained structure was observed for the hypereutectic ternary alloy (Tquen. = 400ºC). Nano-sized grains of 50-60 nm were present on the boundaries of 1-2 µm large-sized grains. TEM shows the formation of nanocomposite Al3Zr/Al3Sc particles. The formation of Al3Zr shell changes the nature of the interfacial fit of the particle with the matrix and slows down the decomposition during the coalescence. Ternary Al-Sc-Zr alloys have significantly higher thermal stability during aging as compared to binary Al-Sc and Al-Zr alloys. |
|
List of References |
Other articles from this number
1) Magnetic Properties of Fe/Cu Multilayers Prepared Using Pulsed-Current Electrodeposition [01001-1-01001-3]2) Theory of Spin Waves in a Circular Nanotube Composed of an Easy-Plane Ferromagnet. Consideration of the Dissipation for a Non-metallic External Medium [0-0]
3) The Effect of the Generated Pump Electric Field on the Amplification Properties of a Superheterodyne Parametric Free-Electron Laser [0-0]
4) Theory of Spin Waves in a Circular Nanotube Composed of an Easy-Plane Ferromagnet. Consideration of the Dissipation for a Non-metallic External Medium [0-0]
5) Inductive-Type properties of (Co45Fe45Zr10)x(Al2O3)100-x Nanocomposites Produced by the Ion-Beam Sputtering in the Argon and Oxygen Ambient [01002-1-01002-4]
6) Prospects for the Application of Nanotechnologies to the Computer System Architecture [01003-1-01003-6]
7) Exact Ground States for Quasi 1D Systems with Hubbard Interaction [01004-1-01004-6]
8) Comparison of the Structural Configuration of Cobalt Nanoparticles on Titania and Titania Nanotube Supports [01005-1-01005-4]
9) The Role of Nano-sized Fraction on Spark Plasma Sintering the Pre-Alloyed Spark-Erosion Powders [01007-1-01007-7]
10) Corrosion Resistance of AZ91 Magnesium Alloy with Pulse Electrodeposited Ni-SiC Nanocomposite Coating [01008-1-01008-4]
11) Numerical Study of Negative-Refractive Index Ferrite Waveguide [01009-1-01009-4]
12) Investigation on the Effects of Titanium Diboride Particle Size on Radiation Shielding Properties of Titanium Diboride Reinforced Boron Carbide-Silicon Carbide Composites [01010-1-01010-4]
13) Nanostructured Al Doped SnO2 Films Grown onto ITO Substrate via Spray Pyrolysis Route [01011-1-01011-3]
14) The Annealing Effects of ZnO Thin Films on Characteristic Parameters of Au/ZnO Schottky Contacts on n-Si [01012-1-01012-3]
15) Formation of Nanostructured Thin Film Coatings for Nanocatalysts [01013-1-01013-4]
16) Thermal Reversible Breakdown and Resistivity Switching in Hafnium Dioxide [01014-1-01014-3]
17) Synthesis, Characterization and Performance Study of Phosphosilicate Gel-Sulfonated Poly (Ether Ether Ketone) Nanocomposite Membrane for Fuel Cell Application [01015-1-01015-4]
18) Analysis of the Band-Structure in (Ga, Mn)As Epitaxial Layers by Optical Methods [01016-1-01016-6]
19) Critical Exponents in Percolation Model of Track Region [01017-1-01017-3]
20) Effect of Tertiary Amines on Structural, Morphological and Optical Properties of Nanostructured ZnO Thin Film [01018-1-01018-4]
21) Nanostructured NaBiTe2 Thin Films and Their Properties [01019-1-01019-5]
22) Use of the Ion-Plasma Treatment for Improving the Structural Strength of Items [01020-1-01020-4]
23) Structure of TiAlN Reactive Sputtered Coatings [01021-1-01021-4]
24) Elastic Properties of the Single-Walled Carbon Nanotubes [01022-1-01022-5]
25) Temperature Dependence of a Period of the Modulated Structurein Atom-Vacancy Solid Solution Based on F.C.C. Nickel [01023-1-01023-4]
26) Properties of the Window Layers for the CZTSe and CZTS Based Solar Cells [01024-1-01024-3]
27) Influence of the Inverse Faraday Effect on Switching and Oscillations of Magnetization in Single-Domain Nanoparticles [01025-1-01025-3]
28) Channel Length Effect on Subthreshold Characteristics of Junctionless Trial Material Cylindrical Surrounding-Gate MOSFETs with High-k Gate Dielectrics [0-0]
29) Energy Spectrum of Acoustic Emission Signals in Coupled Continuous Media [0-0]
30) Numerical Modeling of Thin-Film Growth by Random Deposition with Particle Evaporation [0-0]
31) Numerical Modeling of Thin-Film Growth by Random Deposition with Particle Evaporation [0-0]
32) Numerical Modeling of Thin-Film Growth by Random Deposition with Particle Evaporation [0-0]
33) Conceive a Filter by Engraving S Resonators to the Substrate Integrated Waveguide [0-0]
34) Conceive a Filter by Engraving S Resonators to the Substrate Integrated Waveguide [0-0]
