XRD Studies of Co-Fe-Ti Nanocrystalline Intermetallics

Cruz-Gandarilla, F.; Gayosso-Armenta, R.; Hesiquio-Garduño, Miguel; Cabañas-Moreno, J. Gerardo; Martínez-Sánchez, R.

doi:10.4028/www.scientific.net/msf.442.109

Cited by 7 publications

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“…Experimentally, the L1 2 phase has been observed only in these compounds: Co 3 X (X = Ti [75,39,41], Ta [36,37]) and Ni 3 X (X = Mn [77], Fe [44,45], Pt [48]). It is worth mentioning that Ref.…”

Section: Papermentioning

confidence: 99%

First‐principles calculations of thermodynamic properties and planar fault energies in Co₃X and Ni₃X L1₂ compounds

Breidi

Allen

Mottura

2017

Physica Status Solidi (b)

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We do Density Functional Theory based total‐energy calculations of the normalL12 phase in Co3X and Ni3X compounds, X being a transition metal element. The lattice parameters, magnetic moments and formation enthalpies are determined and compared with the available experimental data. The (111) superlattice intrinsic stacking fault energy (SISF), a crucial factor affecting materials strength and their mechanical behavior, is calculated using the axial interaction model. We have applied the quasiharmonic Debye model in conjunction with first‐principles in order to establish the temperature dependence of the lattice parameters and the (111) SISF energies. We investigate our prediction of a low formation enthalpy in the system Ni −25 at.%Zn by doing auxiliary simulations for the fcc random alloy at the composition 25 at.%Zn. Our simulations indicate that the elements Ti, Zr, Hf, Nb, and Ta can help stabilizing the promising and extremely important Co3Al0.5W0.5 alloy.

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Section: Papermentioning

confidence: 99%

First‐principles calculations of thermodynamic properties and planar fault energies in Co₃X and Ni₃X L1₂ compounds

Breidi

Allen

Mottura

2017

Physica Status Solidi (b)

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“…Our previous studies of mechanically alloyed Co-Ti powders have indicated the existence of complex microstructures in the as-milled powders as well as in materials produced by their consolidation [2,9,10]. Co-rich mixtures were shown by Martínez et al [2,9] to become partially amorphous by mechanical alloying in an attritor mill, with nanocrystals of the elemental powders dispersed in an amorphous matrix.…”

Section: Introductionmentioning

confidence: 97%

The Transformation of Co-Rich Alloys Produced by Mechanical Alloying

Cruz-Gandarilla

Gayosso-Armenta

Cabañas-Moreno

et al. 2006

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Elemental powder mixtures of Co and Ti were subjected to high-energy ball milling in order to produce mechanically alloyed powders with nominal compositions Co64Ti36, Co67Ti33, Co70Ti30, Co73Ti27, Co76Ti24 and Co85Ti15. The mechanically alloyed powders were treated during 30 minutes in inert atmosphere at temperatures in the range 300 – 700 °C. Both the as-milled powders as well as those subjected to heat treatments have been characterized by x-ray diffraction, scanning electron microscopy, energy-dispersive x-ray spectrometry and differential thermal analysis. As-milled products consist mostly of agglomerated powders with a size between 10 and 80 µm which give an amorphous-like diffraction pattern, except for the Co85Ti15 sample whose pattern presents the characteristic peaks of the Co3Ti intermetallic phase. The transformation of the asmilled powders occurs at temperatures in the range of about 530 – 670 °C with clearly observed exothermic events. The Co3Ti phase is found in all heat treated samples, together with fcc-Co (in Co76Ti24 and Co85Ti15) or the hexagonal Co2Ti intermetallic phase (in Co64Ti36, Co67Ti33 and Co70Ti30); the Co73Ti27 sample was essentially single-phase Co3Ti after heating to 700 °C. Our results suggest the occurrence of crystallization of an amorphous phase in two overlapping stages during heating of the mechanically alloyed powders.

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TiCo2

Villars¹,

Cenzual²,

Daams³

et al.

Structure Types. Part 3: Space Groups (194) P63/MMC - (190) P-62c

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XRD Studies of Co-Fe-Ti Nanocrystalline Intermetallics

Cited by 7 publications

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First‐principles calculations of thermodynamic properties and planar fault energies in Co₃X and Ni₃X L1₂ compounds

First‐principles calculations of thermodynamic properties and planar fault energies in Co₃X and Ni₃X L1₂ compounds

The Transformation of Co-Rich Alloys Produced by Mechanical Alloying

TiCo2

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XRD Studies of Co-Fe-Ti Nanocrystalline Intermetallics

Cited by 7 publications

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First‐principles calculations of thermodynamic properties and planar fault energies in Co3X and Ni3X L12 compounds

First‐principles calculations of thermodynamic properties and planar fault energies in Co3X and Ni3X L12 compounds

The Transformation of Co-Rich Alloys Produced by Mechanical Alloying

TiCo2

Contact Info

Product

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About

First‐principles calculations of thermodynamic properties and planar fault energies in Co₃X and Ni₃X L1₂ compounds

First‐principles calculations of thermodynamic properties and planar fault energies in Co₃X and Ni₃X L1₂ compounds