A review on the synthesis, crystal growth, structure and physical properties of rare earth based quaternary intermetallic compounds

Mumbaraddi, Dundappa; Sarkar, Sumanta; Peter, Sebastian C.

doi:10.1016/j.jssc.2015.10.032

Cited by 5 publications

(6 citation statements)

References 184 publications

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“…Synthesis of IMCs are usually carried under rigorous conditions such as high temperature in the presence of inert atmosphere by various methods. 29 High temperature provides sufficiently large kinetic energy necessary for diffusion of metal atoms resulting in ordered structure. Thus, high temperature facilitates the desired thermal vibration of atoms, which improves the diffusion of the metal atoms and finally ordering is observed.…”

Section: Resultsmentioning

confidence: 99%

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Synthetically Tuned Pd-Based Intermetallic Compounds and their Structural Influence on the O₂ Dissociation in Benzylamine Oxidation

Marakatti

Sarma

Sarkar

et al. 2019

ACS Appl. Mater. Interfaces

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Intermetallic compounds (IMCs) have diverse electronic and geometrical properties to offer. However, the synthesis of intermetallic nanoparticles is not always easy; developing new methodologies that are conventional for many systems can be challenging, especially when incorporating highly electropositive metals to reduce to IMCs using solution synthesis methodologies. In this study, we report a comprehensive approach to access nanocrystalline Pd x M y (M = Cu, Zn, Ga, Ge, Sn, Pb, Cd, In) intermetallic (IM) via the coreduction method employing sodium borohydride as the reductant. A combination of diffraction, spectroscopic, and microscopic techniques were performed to characterize the formed nanoparticles in terms of their phase composition, purity, particle size distribution, and surface oxidation properties of metals, respectively. IMCs of Pd with the elements such as Cu, Zn, Ga, and Ge exhibited higher catalytic activity that with elements such as In, Sn, Pb, and Cd. The DFT studies on these compounds revealed that the adsorption of benzylamine at the Pd site and the dissociative adsorption of O 2 on the IM surface play a significant effect on catalytic activity. Among them, PdCu IM exhibited an excellent conversion of benzylamine (94.0%), with 92.2% of dibenzylimine selectivity compared to other IMCs. Moreover, PdCu exhibited decent recyclability and activity for the oxidation of different substituted primary amines.

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Section: Resultsmentioning

confidence: 99%

“…Synthesis of IMCs are usually carried under rigorous conditions such as high temperature in the presence of inert atmosphere by various methods . High temperature provides sufficiently large kinetic energy necessary for diffusion of metal atoms resulting in ordered structure.…”

Section: Resultsmentioning

confidence: 99%

Synthetically Tuned Pd-Based Intermetallic Compounds and their Structural Influence on the O₂ Dissociation in Benzylamine Oxidation

Marakatti

Sarma

Sarkar

et al. 2019

ACS Appl. Mater. Interfaces

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“…[6][7][8][9][10] There is a persistent struggle to improve various properties of magnesium alloys, including formability, strength, ductility, and tension-compression asymmetry. [15][16][17][18][19] In recent years, Mg-Zn-Y series alloys have received a significant attention from researchers due to their superior mechanical properties and distinctive microstructures. [11][12][13][14] It has been recognized that alloying with RE elements brings about beneficial effects in terms of strengthening, formability, and creep resistance.…”

Section: Introductionmentioning

confidence: 99%

“…[11][12][13][14] It has been recognized that alloying with RE elements brings about beneficial effects in terms of strengthening, formability, and creep resistance. [15][16][17][18][19] In recent years, Mg-Zn-Y series alloys have received a significant attention from researchers due to their superior mechanical properties and distinctive microstructures. [20][21][22] This alloy system is largely acknowledged for being rich in ternary intermetallic phases.…”

Section: Introductionmentioning

confidence: 99%

A Critical Review of Mg–Zn–Y Series Alloys Containing I, W, and LPSO Phases

Tahreen

Chen

2016

Adv Eng Mater

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Magnesium and its alloys are playing an increasingly important role in the transportation industry due to the pressing demand of lightweight structures to improve fuel efficiency and reduce CO 2 emissions. But the shortcomings of poor room temperature (RT) formability and high temperature strength, tension-compression asymmetry, and anisotropy are among the major issues which are currently limiting their widespread applications. Recently, research and development activities of Mg-Zn-Y series alloys have significantly increased because of their superior mechanical properties arising from the formation of different ternary phases known as I (Mg 3 YZn 6 ), W (Mg 3 Y 2 Zn 3 ), and LPSO (Mg 12 YZn). In this review article, the crystal structure of these phases and their orientation relationships with hexagonal magnesium matrix are discussed. Recent advances about I, W, and LPSO phase containing Mg alloys are presented, along with the effects of these phases on the microstructural evolution and mechanical properties including tensile, compressive, fatigue, and creep resistance. Important aspects involving thermal stability, phase transformation, and influence of heat treatment are also described. Based on the current status, some existing issues are pointed out and further studies are suggested so as to warrant safe and reliable lightweight structural applications of Mg-Zn-Y alloys in the automotive industry.

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“…In recent years, magnesium alloys with rare earth (RE) elements have been widely investigated which led to numerous publications in this field [17,[111][112][113][114][115][116][117]. By now many findings are reported for the improved properties of this class of alloys including grain refinement, better formability at low temperatures, and enhanced strength and creep resistance at elevated temperatures [18,[118][119][120].…”

Section: Improvement Of Magnesium Alloys By Alloying With Rare Earth Elementsmentioning

confidence: 99%

Influence of Yttrium Addition on Texture and Deformation Behavior in an Extruded ZM31 Alloy

Tahreen¹

2021

Preprint

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The current “storm” of lightweighting, a revolution in materials, processes, and business models, which is brewing on the horizon of the auto industry, inspires researchers and engineers to develop and apply new wrought magnesium alloys with improved properties. For wider applications in the automotive and aerospace industries, the enhancement of strength, thermal stability and formability of magnesium alloys is required. In recent years, Mg-Zn-Y series alloys have received a considerable attention from the research community due to their improved mechanical properties. The present study was aimed at evaluating the influence of Y addition to Mg-Zn-Mn system based on phase formation, mechanical response and texture development with special attention paid to recrystallization, hot characterization and relative activity. The dissertation evaluated the strain hardening and deformation behavior of as-extruded Mg-ZnMn (ZM31) magnesium alloy with varying Y contents via compression testing at room temperature, 200°C and 300°C. Alloy ZM31+0.3Y consisted I-phase (Mg3YZn6); alloy ZM31+3.2Y contained I-phase and W-phase (Mg3Y2Zn3); alloy ZM31+6Y had long-period stacking-ordered (LPSO) X-phase (Mg12YZn) and Mg24Y5 particles. With increasing Y content the basal texture became weakened significantly. While alloys ZM31+0.3Y and ZM31+3.2Y exhibited a skewed true stress-true stain curve with a three-stage strain hardening feature caused by the occurrence of {10 Ī 2} extension twinning, the true stress-true strain curve of alloy ZM31+6Y was normal due to the dislocation slip during compression. The evolution of flow stress, texture and microstructure during the compression tests has been studied under various conditions of temperature and strain rates. Optical metallography, EBSD techniques and X-ray diffraction were employed to study the microstructural development and texture evolution. The deformation activation energy was calculated and the processing maps were generated to determine the optimum hot working parameters. In addition, viscoplastic selfconsistent model was successfully used to predict the experimental textures. Lastly, the strengthening mechanisms in each Mg-Zn-Mn-Y material are established quantitatively for the first time to account for grain refinement, thermal mismatch, dislocation density, load bearing, and particle strengthening contributions. The present work laid the foundations for a better understanding the role of Y elements on deformation behavior in magnesium alloys.

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A review on the synthesis, crystal growth, structure and physical properties of rare earth based quaternary intermetallic compounds

Cited by 5 publications

References 184 publications

Synthetically Tuned Pd-Based Intermetallic Compounds and their Structural Influence on the O₂ Dissociation in Benzylamine Oxidation

Synthetically Tuned Pd-Based Intermetallic Compounds and their Structural Influence on the O₂ Dissociation in Benzylamine Oxidation

A Critical Review of Mg–Zn–Y Series Alloys Containing I, W, and LPSO Phases

Influence of Yttrium Addition on Texture and Deformation Behavior in an Extruded ZM31 Alloy

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A review on the synthesis, crystal growth, structure and physical properties of rare earth based quaternary intermetallic compounds

Cited by 5 publications

References 184 publications

Synthetically Tuned Pd-Based Intermetallic Compounds and their Structural Influence on the O2 Dissociation in Benzylamine Oxidation

Synthetically Tuned Pd-Based Intermetallic Compounds and their Structural Influence on the O2 Dissociation in Benzylamine Oxidation

A Critical Review of Mg–Zn–Y Series Alloys Containing I, W, and LPSO Phases

Influence of Yttrium Addition on Texture and Deformation Behavior in an Extruded ZM31 Alloy

Contact Info

Product

Resources

About

Synthetically Tuned Pd-Based Intermetallic Compounds and their Structural Influence on the O₂ Dissociation in Benzylamine Oxidation

Synthetically Tuned Pd-Based Intermetallic Compounds and their Structural Influence on the O₂ Dissociation in Benzylamine Oxidation