bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ripening of L12 Ni3Ti precipitates in the framework of the trans-interface diffusion-controlled theory of particle coarsening
Authors: Ardell Alan J. , Kim Dongman , Ozolins Vidvuds 
Published: March 2022

Abstract
Data are presented on the kinetics of coarsening of γ′-type Ni3Ti precipitates (L12 crystal structure) in three binary Ni –Ti alloys containing 10.31, 11.84, and 13.72 at.% Ti aged at 720 °C for times up to 64 h. Data on the distributions of particle sizes (PSDs) are also presented. These data, as well as previously published data, are analyzed in light of a new theory of coarsening in which diffusion is controlled by transport through the non-sharp interface between the matrix and precipitate phases. The new theory, called the trans-interface diffusion-controlled (TIDC) theory of coarsening, predicts time (t)-dependent behavior of the type 〈r〉
n
∝ t for the growth of precipitates of average radius 〈r〉 and X
Ti ∝ t–1/n
for the depletion of the solute concentration of the matrix, X
Ti. The exponent n is intimately related to the width of the interface between the precipitate and matrix phases, δ, which is assumed to depend on the particle radius as δ ∝ rm
, where n = m + 2. The shape of the scaled distribution of particle sizes (PSD) depends on n and the thermo-physical kinetic constants are independent of volume fraction. The data on kinetics are evaluated and compared for n = 2.375, determined from analyses of the PSDs, and for n = 3, which is the traditionally accepted value. The agreement between the data on kinetics and predictions of the TIDC theory is acceptable, and the TIDC theory is the only one capable of explaining the experimentally observed absence of an effect of volume fraction on the kinetics at larger volume fractions, and the shapes of the PSDs.
Structure-induced order – disorder transformation in Cd – Na liquid alloys
Authors: Singh R. N. , Ali I. 
Published: March 2022

Abstract
The origins of the S-shaped entropy of mixing and order – disorder transformation in Cd –Na liquid alloys have been investigated within a first-principle approach of a pseudo-potential perturbation scheme with the Gibbs–Bogoliubov variation technique.We find that the deepening of the structure part of the entropy around the stoichiometric composition (c
Na ≈ 0.33) is responsible for the S-shaped entropy and suggests the existence of short-range order in the liquid state. The role of the local-field correction function, G(q), of conduction electrons on the entropy of mixing is examined. The impact of G(q) on partial structure factors is more visible towards low q (q → 0) than at higher q.
Isothermal crystallization behavior of undercooled liquid Pd40Cu30Ni10P20 in terms of crystal growth, overall volume crystallization kinetics and their relation to the viscosity temperature dependence
Authors: Russew Krassimir , Stojanova Liljana , Kovacheva Rositza 
Published: March 2022

Abstract
The crystallization behavior of undercooled liquid Pd40Cu30Ni10P20 metallic alloy has been studied with the aid of differential scanning calorimetry, optical metallography, and electron microscopy methods. The crystallization occurs as a single-stage process starting preferably on the surface of casting voids in the sample volume and on the outer sample cutting planes. The linear crystal growth velocity of crystallizing cells was measured at several constant temperatures in the range 590 –620 K. It is constant at constant temperatures and its temperature dependence is in good agreement with the theoretical concepts of Uhlmann using the temperature dependence of the viscosity of the alloy studied. A differential scanning calorimetry study of isothermal overall volume transformation kinetics of samples pre-annealed at 600 K for 600 s was carried out at several constant temperatures. The experimental data are interpreted on the basis of the equation of Kolmogorov-Avrami-Johnson-Mehl for the case of three-dimensional growth of a fixed number of pre-existing nuclei. The possibility to revitrify the crystallized samples by their melting in differential scanning calorimeter, followed by quick cooling with cooling rate of 5 K τ– 1 is shown. The volume transformation kinetics of revitrified samples has been also studied.
Thermodynamic properties and phase relations of Zn-rich alloys in the system Pt–Zn
Authors: Huang Yongzhang , Richter Klaus W. , Yuan Wenxia , Qiao Zhiyu , Ipser Herbert 
Published: March 2022

Abstract
Zinc vapor pressures over binary Pt–Zn alloys were determined in the composition range from 63 to 84 at.% Zn for temperatures between 840 –1150 K using an isopiestic method. The phase boundaries of four different phase fields in this composition range could be fixed based on the experimental data. Thermodynamic activities and partial molar enthalpies of zinc within these phase fields were derived from the vapor pressure data and the composition dependence of the zinc activity was calculated for 1023 K. The integral Gibbs energy at 1273 K was derived as a function of composition by Gibbs–Duhem integration, combining the activity data of the present investigation with earlier results from the literature.
Metastable phases and nanocrystalline-forming ability (NFA) of melt-quenched Ni-rich (Zr, Hf)–Ni alloys
Authors: Bakonyi Imre 
Published: March 2022

Abstract
In this paper, the basic principles of and some recent advances in rapid solidification are briefly considered, with main emphasis on the formation of single-phase metastable states during meltquenching in Ni-rich Zr –Ni and Hf–Ni alloys. Factors controlling nanocrystalline-forming ability are discussed in detail, with particular view on the preparation of single-phase nanocrystalline alloys by the melt-quenching process.
Thermodynamic assessment of the Ce–O system in solid state from 60 to 67 mol.% O
Authors: Seifert Hans Jürgen , Nerikar Pankaj , Lukas Hans Leo 
Published: March 2022

Abstract
A thermodynamic dataset was developed for the central part of the Ce–O system covering the range between Ce2O3 and CeO2 up to about 2000 K. All literature data for the thermodynamic functions, the phase diagram and crystallography were critically assessed. The modeling of the phases takes into account their crystal chemistry including order – disorder behavior. From the dataset, diagrams were calculated for the (1) heat capacities of CeO2 and Ce2O3, (2) enthalpy increment of CeO2, (3) chemical potentials of oxygen in CeO2–x
, (4) partial enthalpies of oxygen in CeO2–x
, (5) the partial phase diagram of Ce–O and (6) chemical potentials of oxygen in the two-phase areas. These diagrams reproduce fairly well the experimental data from literature.
Microstructure, hardness, and fracture toughness evolution of hot-pressed SiC/Si3N4nano/micro composite after high-temperature treatment
Authors: Šajgalík Pavol , Hnatko Miroslav , Lojanová Štefánia , Lenčéš Zoltán , Pálková Helena , Dusza Ján 
Published: March 2022

AbstractThe grain boundary phases in SiC/Si3N4nano/micro-composite changes with time of high temperature treatment at 1750 °C in nitrogen atmosphere. Stable phases were obtained after 26 hours of annealing. Moreover, the average grain diameter distribution was significantly changed. The hardness and fracture toughness of the SiC/Si3N4nano/micro-composites decreased with the duration of the high-temperature treatment. Both findings can be explained by the different secondary crystalline phases formed during the high-temperature treatment. Phases Si2N2O, Y2SiO5, and Y2Si2O7, typical for the samples treated up to 4 h, were replaced by the YNSiO2phase in the samples treated longer than 26 h. Anisotropy of the measured mechanical properties in different sample cross-sections caused by the Si3N4grain alignment become negligible after long term high-temperature treatment.
High-temperature plasticity of SiC sintered with Lu2O3-AlN additives
Authors: Rixecker Georg , Biswas Koushik 
Published: March 2022

Abstract
SiC ceramics containing Lu2O3–AlN sintering additives were gas-pressure sintered, and creep testing in four-point bending geometry was performed at temperatures between 1200 °C and 1500 °C in air. Compared with the more conventional additive system Y2O3 –AlN, the creep resistance of the Lu2O3-containing ceramics is higher. In particular, strain rates down to 6 ⨯ 10–10 s–1 were measured after 60 h at both 1300 °C/300 MPa and 1400 °C/100 MPa; in no case was steady-state creep reached. Annealing the ceramics at 1950 °C for extended periods of time led to significant changes in the amount and distribution of intergranular phases. However, in contrast to earlier work using Y2O3 –AlN additives, the influence of annealing on the creep resistance was negligible. Compliance testing as a function of temperature was conducted in order to monitor the softening behavior of materials with different additive compositions. In favorable cases, the drop in stiffness was only 12% up to a test temperature of 1450 °C.
Interaction of functionalised surfaces on silica with dissolved metal cations in aqueous solutions
Authors: Majewski Peter 
Published: March 2022

Abstract
The study clearly shows that different metal cations were efficiently removed from water by employing coated silica particles with SO3H-terminated functionalized surfaces. Significant amounts of Fe, Mn, Ca, Mg, Na, and K could be removed from natural water samples with different concentrations varying from 0.075 mg/l for Mn up to 12 000 mg/l for Na by stirring the functionalized silica particles in the water samples for 1 h at room temperature. ICP–MS verify the removal of the elements and ToF-SIMS analyses clearly showed the presence of the elements on the particles after the treatment procedure. The removal of the metal cations is believed to be due to electrostatic attraction of the positively charged presumably hydrolysed metal cations to the negatively charged deprotonated SO3H-groups. However, from the current study it can not be excluded that chemisorption of the cations by the SO3H-group may be possible.
Out-of-pile chemical compatibility of Pb–Bi eutectic alloy with Graphite
Authors: Sengupta A. K. , Bhagat R. K. , Laik A. , Kale G. B. , Jarvis T. , Majumdar S. , Kamath H. S. 
Published: March 2022

Abstract
Lead Bismuth eutectic alloy (Pb: 55.5 wt.%, Bi: 44.5 wt.%) is a potential candidate coolant material for high-temperature reactors because of its low melting point (124 °C), high thermal conductivity, heat capacity, and better neutronic properties. Out-of-pile chemical compatibility studies of this coolant with graphite (coolant channel) have been carried out by isothermal annealing of the liquid alloy in a graphite crucible at 800, 900, 1000, and 1100 °C for times ranging from 100 h to 1000 h. Formation of a reaction layer is observed. The growth rate of the reaction layer follows a parabolic law. Reaction layer thicknesses of 61.3 μm and 121 μm are estimated from the growth rate vs. time relation after 1 year and 5 years respectively. The growth of the reaction layer is diffusion-controlled and the activation energy of the reaction is estimated to be 100 KJ/mol.
Kinetic study of the β → α + γ transformation reaction in a CuZnAl alloy
Authors: De Micco Georgina , Bohé Ana Ester , Pasquevich Daniel Miguel 
Published: March 2022

Abstract
In the present work we study the phase transformation reaction of a Cu-20Zn-7Al (wt.%) alloy by isothermal and nonisothermal in situ X-ray diffraction. An effective activation energy for each phase is obtained for the range between 275 and 395 °C. The experimental data are also adjusted with the JMA equations. Finally, we present the TTT (time – temperature – transformation) diagram corresponding to the precipitation of alpha and gamma for the lower temperatures. Below 340 °C, we found for this alloy that the gamma phase precedes the formation of alpha.
Calorimetric investigation of the binary Cu–In system
Authors: Knott S. , Mikula A. 
Published: March 2022

Abstract
Although some investigations of the integral enthalpy of mixing of the binary Cu–In system have already been done, there is a lack of conformity of these data within the literature. Therefore the integral enthalpy of mixing was determined with a Calvet-type calorimeter. The measurements were performed at four different temperatures to determine the temperature dependence of the integral enthalpy of mixing.
Effect of reinforcement size hybridization on the wear properties of SiCp/Cu Composites
Authors: Zhan Yongzhong , Xie Haofeng , Shi Xiaobo 
Published: March 2022

Abstract
Reinforcement size is an important factor that influences the mechanical and tribological properties of particulate reinforced metal matrix composites (PRMMCs). However, relatively few works have been carried out to investigate this issue. There are still many problems to be solved, on the optimum design of PRMMCs of tribological applications. In this work, copper-matrix composites reinforced with SiC particles of mono-size and hybrid-size are fabricated through a powder-metallurgy plus hot-extrusion method. The main purpose is to investigate the effect of reinforcement size hybridization on the dry sliding wear behavior of PRMMCs. The results indicate that finer particles result in a better reinforcing effect and significantly reduce the plastic flow and adhesive transfer of surface and subsurface material. The deeply embedded coarse particles bear the external applied load and resist the plowing effect of the counterpart. The different roles of the particulate components with various sizes promote the exertion of the other’s strengthening function, therefore resulting in higher wear resistance.
Filtration resistance during pressure filtration tests of liquid aluminium alloys
Authors: Cao Xinjin 
Published: March 2022

Abstract
Prefil Footprinter, a portable pressure filtration instrument, is usually employed to detect liquid metal quality. However, no investigations have ever been done to determine overall filtration resistance and resistance of the “clean” filter media. Based on the identification of flow behaviour using the derivative methods, classic filtration equations have been effectively used to estimate total filtration resistance for the first time. The variations of overall resistance during filtration provide a new approach to understand filtration behaviour. The resistance values of the “clean” filter media have been obtained for the first time. An innovative method has been developed to obtain the resistance of the “clean”' filter media through the backward extrapolation of the overall filtration resistance versus filtrate weight or filtration time curves over the steady stages operating in incompressible cake mode.
Effect of tin added to the zinc bath on the formation and the microstructure of hot-dip galvanized coatings
Authors: Avettand-Fènoël Marie-Noëlle , Reumont Guy , Goodwin Frank , Perrot Pierre , Foct Jacques 
Published: March 2022

Abstract
The present study aims to analyze the effect of tin, added to zinc bath containing aluminium, on the microstructure and on the development of spangles of continuous hot-dip galvanized coatings. Different experimental conditions have been explored and the mechanism of nucleation and growth taking place during the solidification of the coating are discussed with the support of a thermodynamics approach.
Indentation behaviour of (011) thin films of III–V semiconductors: polarity effect differences between GaAs and InP
Authors: Largeau Ludovic , Patriarche Gilles , Le Bourhis Eric , Rivière Jean-Pierre 
Published: March 2022

Abstract
(011) thin films of GaAs and InP (220 and 250 μm thick, respectively) were deformed by a Vickers indenter at elevated temperatures (350 – 400 °C) under loads in the range 0.4 – 2.9 N. For loads higher than 1.9 N, symmetric punching through InP was detected at the opposite face while it was asymmetric through GaAs. In InP, when the punching mechanism took place, pile-up around the indent site progressively disappeared. Moreover, the measured plastic volumes reveal that plastic flow throughout the specimens is volume conservative, implying that pile-up and punching events are related. In GaAs, the anisotropic pile-up plasticity was studied using transmission electron microscopy. Models describing the material flow through the samples and reverse flow of matter are proposed.
Effect of LiYO2 addition on sintering behavior and indentation properties of silicon nitride ceramics
Authors: Matovic B. , Rixecker G. , Boskovic S. , Aldinger F. 
Published: March 2022

Abstract
The influence of the sintering additive LiYO2 (5– 15 wt.%) on sintering behavior, microstructure and mechanical properties of Si3N4 ceramics was investigated. Since LiYO2 enables densification of Si3N4 at extraordinarily low temperatures, sintering was carried out in the range from 1200– 1700 °C. Densification was found to be enhanced with increasing additive content due to an increasing volume fraction of the liquid. The phase transformation and grain growth occurred through a solution-reprecipitation mechanism, where the precipitation took place preferentially on pre-existing β-Si3N4 nuclei (of which the starting powder already contained 20 wt.%). The indentation fracture toughness increased with both sintering time and additive content as a result of the growth of elongated grains.
Thermodynamic assessment of the systems La2O3–Al2O3 and La2O3–Y2O3
Authors: Fabrichnaya O. , Zinkevich M. , Aldinger F. 
Published: March 2022

Abstract
The thermodynamic parameters of the systems La2O3– Al2O3 and La2O3–Y2O3 are assessed using the Calphad technique. The available phase equilibrium data and calorimetric measurements for the LaAlO3, perovskite phase have been used. The calculated phase diagrams are in reasonable agreement with experimental results. However, experimental data for the La2O3–Y2O3 system demonstrated large uncertainty and new experimental study of solid state reactions would be useful to verify the calculated diagram. Experimental investigations of thermodynamic properties are necessary for both systems to verify the calculated phase diagrams and thermodynamic properties.
Plane bending fatigue behavior of interstitial-free steel at room temperature
Authors: Islam Mohammed Aminul , Tomota Yo 
Published: March 2022

Abstract
Interstitial-free steels are widely used as thin sheet for automobile external panels. For this type of application, essential properties of the steel are deep-drawability and stretch-formability. However, low-strength interstitial-free steel is nearly pure iron and work on fatigue fracture behavior of this steel might be adopted as a basic study to understand the behavior of high-strength steels used for structural components. In this study, the fatigue fracture behavior of low-strength interstitial-free steel has been studied at room temperature in air and in an argon atmosphere. Fractographic observations on fatigue fracture surfaces reveal a mixed type of fracture mode (intergranular and transgranular cracking) for all specimens. The major portion of intergranular fracture has been found at the regions of low and medium crack lengths. Further increase in the crack length causes a decrease in the proportion of intergranular cracking and, finally, the fracture mode becomes completely transgranular. At the same test temperature, the proportion of intergranular fracture drastically decreased when the test was carried out in the argon atmosphere.
Processing and mechanical behaviour of a dual scale particle strengthened copper composite
Authors: Tiziani C. , Götting M. , Rösler J. 
Published: March 2022

Abstract
Oxide dispersion strengthened (ODS) and dual scale particle strengthened (DSPS) copper composites were successfully manufactured by a powder metallurgical processing route, containing Al2O3 particles with a mean diameter of 17 nm as dispersoids and, in the case of the DSPS material, 15% tungsten fibres about 3 mm long. Their mechanical behaviour was investigated at ambient and elevated temperatures. The ODS material displayed mechanical properties comparable to those of commercial GlidCop® alloys. Addition of tungsten fibres in case of the DSPS material increased the elevated temperature flow strength relative to the ODS counterpart by about 12 %. This result is rationalised by finite element calculations, taking fibre orientation, plastic deformation of the fibres as well as the role of the fibre coating into account.
Threshold dynamics of an HIV-1 model with both virus-to-cell and cell-to-cell transmissions, immune responses, and three delays
Authors: Miao Hui , Jiao Meiyan 
Published: March 2022

Abstract
In this paper, the dynamical behaviors of a multiple delayed HIV-1 infection model which describes the interactions of humoral, cytotoxic T lymphocyte (CTL) immune responses, and two modes of transmission that are the classical virus-to-cell infection and the direct cell-to-cell transmission are investigated. The model incorporates three delays, including the delays of cell infection, virus production and activation of immune response. We first prove the well-posedness of the model, and calculate the biological existence of equilibria and the reproduction numbers, which contain virus infection, humoral immune response, CTL immune response, CTL immune competition, and humoral immune competition. Further, the threshold conditions for the local and global stability of the equilibria for infection-free, immune-free, antibody response, CTL response, and interior are established by utilizing linearization method and the Lyapunov functionals. The existence of Hopf bifurcation with immune delay as a bifurcation parameter is investigated by using the bifurcation theory. Numerical simulations are carried out to illustrate the theoretical results and reveal the effects of some key parameters on viral dynamics.
Evaluation of endocrinological involvement and metabolic status in patients with Gaucher disease Type 1 and Fabry disease under enzyme replacement therapy
Authors: Ersoy Melike , Pişkinpaşa Hamide 
Published: March 2022

Abstract

Objectives
Gaucher disease type 1 (GD1) and Fabry disease (FD) are the two most common lysosomal storage diseases. For over three decades, effective enzyme replacement therapies (ERTs) have changed the fate of patients and offered a longer chance of survival and improve their quality of life.

Methods
The clinical and molecular findings, endocrinological features and metabolic status of 26 patients (16 with FD, and 10 with GD1) were evaluated. The results were compared to age- and gender-matched healthy individuals.

Results
Patients with GD1 and FD were followed for 7.2 ± 4.7 and 6.4 ± 4.3 years, respectively. Calcium and magnesium levels in patients with GD1 were lower than in controls (p=0.01; p=0.002). Osteoporosis was detected in 20% (n=2) of GD1 patients and 12.5% (n=2) of FD patients. The HbA1c value of GD1 patients was significantly lower than both in control and Fabry patients (p=0.004; and p=0.007, respectively). There was a negative correlation between LysoGb3 and female gender (p=0.04; r=−0.49), but no correlation was found with any other biochemical parameters. There was a negative correlation between the LysoGb1 level and the neutrophil (p=0.03; r=−0.711) and thrombocyte levels (p=0.02; r=−0.767), and a positive correlation with ferritin levels (p<0.001; r=0.867).

Conclusion
Long time effective ERT seems to have beneficial effects on metabolic and hormonal status as well as primary target organs in both FD and GD1 patients.