Tabulated Lattice Spacings and Data of the Elements

Pearson, W. B.

doi:10.1016/b978-1-4832-1318-7.50011-5

Cited by 144 publications

(208 citation statements)

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“…[6,12,19,25,26] On the other hand, atom substitution in binary alloys can drastically increase the transition temperature to enlarge the range of the Heusler phase, specifically, in binary Fe 3 Al with BiF 3 -type structure and/or in ternary MnCu 2 Al-type by substitution of Al by Si [27] or of Fe by M (M = Ti, [4,16] V, Cr, Mn, and Mo [26,28] ), respectively. For the ternary alloys, TiFe 2 Al and TiNi 2 Al, past efforts focused on physical properties, [3,8,11,12,[29][30][31] lattice parameters, [6,19,[32][33][34][35][36][37][38][39][40] and structure evaluations. [36] However, no investigation is known dealing with detailed atomic site preference in the Heusler phase of the quaternary system Ti-Fe-Ni-Al.…”

Section: Introductionmentioning

confidence: 99%

The Heusler Phase Ti25(Fe50 − x Ni x )Al25 (0 ≤ x ≤ 50); Structure and Constitution

Yan

Grytsiv

Rogl

et al. 2008

J Phs Eqil and Diff

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Alloys with composition Ti 25 (Fe 50 2 x Ni x )Al 25 (0 £ x £ 50) were investigated employing electron probe microanalysis (EPMA) and X-ray powder diffraction (XPD). For TiFe 2 Al, in situ neutron powder diffraction (ND) was used for the inspection of phase constitution covering the temperature range from 27°C (300 K) to 1277°C (1550 K). Combined Rietveld refinement of ND and XPD data for TiFe 2 Al revealed that Fe atoms occupy the 8c site in space group Fm " 3m; Ti with a small amount of Al sharing the 4a site, and the remaining Ti and Al atoms adopting the 4b site. This structural model was successfully applied in the refinement of all alloys Ti 25 (Fe 50 2 x Ni x )Al 25 (0 £ x £ 50). Partial atom order exists on the Fe-rich side while complete order is observed for the Ni-rich side. Profiles recorded by in situ neutron powder diffraction for TiFe 2 Al in the range of investigated temperatures show two phases, namely Heusler phase and MgZn 2 -type Laves phase. Diffraction peaks from the Heusler phase dominate the profiles at lower temperatures but at higher temperatures the MgZn 2 -type Laves phase is the main phase. No CsCl-type phase was found in the alloy in the investigated temperature range. The thermal expansion coefficient of TiFe 2 Al is 1.4552310 25 K 21 .

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Section: Introductionmentioning

confidence: 99%

The Heusler Phase Ti25(Fe50 − x Ni x )Al25 (0 ≤ x ≤ 50); Structure and Constitution

Yan

Grytsiv

Rogl

et al. 2008

J Phs Eqil and Diff

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“…The interpretation of the electron diffractograms was carried out using the DYFR software (created by Professor Włodzimierz Dudziński), which enabled theoretical images of electron diffractograms for the parameters defined according to the Pearson catalogue (a, b, c, α, β, γ) to be obtained [ 31 , 32 , 33 ]. The results achieved were then graphically compared (overlapping) with the registered images.…”

Section: Methodsmentioning

confidence: 99%

Investigation into Changes of Microstructure and Abrasive Wear Resistance Occurring in High Manganese Steel X120Mn12 during Isothermal Annealing and Re-Austenitisation Process

et al. 2022

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Hadfield steel, under unit pressure conditions, strengthens itself by forming a high density dislocation structure, which results in increased resistance to dynamic impact wear. However, under abrasion conditions, the homogeneous microstructure of the cast steel is insufficient to achieve the expected service life. The aim of the research is to conduct a comparative analysis of the material in its as-delivered state and after two-stage heat treatment (isothermal annealing followed by re-austenitisation). It was found that after isothermal annealing of X120Mn12 grade steel at a temperature of 510 °C, a microstructure with a complex morphology consisting of colonies of fine-grained pearlite, (Fe,Mn)3C carbides distributed along the grain boundaries of the former austenite and needle-like (Fe,Mn)3C carbides was obtained in the austenite matrix. The subsequent thermal treatment of the steel with the use of supersaturating annealing at 900 °C resulted in a heterogeneous microstructure consisting of evenly distributed globular carbide precipitations in a matrix of considerably finer austenite grains in comparison with the as-delivered original state. As a result of the final microstructural changes achieved, a 16.4% increase in abrasion resistance was obtained compared to the delivered condition.

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“…The names describe the density of the emerging structures: low-density quasi-crystals, named L1 to L3, intermediatedensity quasi-crystals, labelled I1 to I4, and high-density approximants, called H1 to H3. We label the crystalline assemblies by their Pearson symbol [31] and the disordered states by D1 to D4.…”

Section: Methods and Theory (A) Simulationsmentioning

confidence: 99%

Evolution of local motifs and topological proximity in self-assembled quasi-crystalline phases

et al. 2020

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Using methods from the field of topological data analysis, we investigate the self-assembly and emergence of three-dimensional quasi-crystalline structures in a single-component colloidal system. Combining molecular dynamics and persistent homology, we analyse the time evolution of persistence diagrams and particular local structural motifs. Our analysis reveals the formation and dissipation of specific particle constellations in these trajectories, and shows that the persistence diagrams are sensitive to nucleation and convergence to a final structure. Identification of local motifs allows quantification of the similarities between the final structures in a topological sense. This analysis reveals a continuous variation with density between crystalline clathrate, quasi-crystalline, and disordered phases quantified by ‘topological proximity’, a visualization of the Wasserstein distances between persistence diagrams. From a topological perspective, there is a subtle, but direct connection between quasi-crystalline, crystalline and disordered states. Our results demonstrate that topological data analysis provides detailed insights into molecular self-assembly.

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Tabulated Lattice Spacings and Data of the Elements

Cited by 144 publications

References 0 publications

The Heusler Phase Ti25(Fe50 − x Ni x )Al25 (0 ≤ x ≤ 50); Structure and Constitution

The Heusler Phase Ti25(Fe50 − x Ni x )Al25 (0 ≤ x ≤ 50); Structure and Constitution

Investigation into Changes of Microstructure and Abrasive Wear Resistance Occurring in High Manganese Steel X120Mn12 during Isothermal Annealing and Re-Austenitisation Process

Evolution of local motifs and topological proximity in self-assembled quasi-crystalline phases

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