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Showing 1 to 13 of 13 for “"compositional effects"”.
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High-strain actuation of lead-free perovskites : compositional effects, phenomenology and mechanism
An experimental study was carried out to map the compositional dependence of electromechanical behavior and ferroelectric phase stability in the barium, zirconium-codoped sodium bismuth titanate (BNBZT) system for barium concentrations up to 18 mol.% and zirconium concentrations up to 4 mol.%. A …
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Compositional Effects on the Chemorheological Properties and Forming Behavior of Aqueous Alumina-Poly(vinyl Alcohol) Gelcasting Suspensions
Gelcasting suspensions were used as feedstock for solid free-form fabrication (SFF) of ceramic components. The influence of processing conditions (e.g., tip diameter, mixing rate, table speed, etc.) and suspension rheology on deposition behavior was investigated. Continuous printablity was achieved …
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Preparation and Characterization of a Treated Montmorillonite Clay and Epoxy Nanocomposite
… of montmorillonite to epoxy is of interest. Compositional effects on epoxy reactivity, on molecular relaxation, and on mechanical properties were investigated. Change in reactivity was determined by Differential Scanning Calorimetry. Tensile properties at room temperature indicated improved …
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Heat treatment and additive effects on microstructure and properties of tetragonal-(2-3 mol%) yttria-stabilized-zirconia
… (YSZ) was investigated. Preliminary studies on compositional effects were studied in 2-3 mol% YSZ prepared from a mixed oxide powder. Microstructure-property relationships were then investigated as a function of heat treatment conditions in 3 mol% YSZ prepared from a commercially available …
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Determining soft segment structure-property effects in the enhancement of segmented polyurethane performance
… (PTMO) soft segments was synthesized to study compositional effects on the extent of soft segment mixing, and how these effects translated to both mechanical and barrier performance. Shorter soft segment chain systems displayed a greater hard segment compatibility, which resulted in materials …
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Measurement and modeling of fluid-fluid miscibility in multicomponent hydrocarbon systems
… varied during the experiments to investigate the compositional dependence of fluid-fluid miscibility. The miscibility conditions determined from the VIT technique agreed well with the reported miscibilities for all the three standard fluid systems used. This confirmed the sound conceptual basis of …
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The high temperature geochemistry of vanadium: From isotope ratios in ocean island basalt to thermal diffusion processes at the core-mantle boundary
… cold end. This could play a role in Earth’s compositional and isotopic evolution given that the core-mantle boundary is the biggest thermal boundary layer (TBL) on earth. However, the valence state of multi-valent elements and thus oxygen fugacity during the thermal diffusion process is …
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Mantle-Melting at High Pressure: Experimental Constraints on Magma Ocean Differentiation
… of 25-26 GPa and temperatures up to 2400°C. Compositional effects on the melting relations were investigated by varying bulk Mg/Si and Mg/(Mg+Fe) ratios (the latter is denoted as Mg-number, Mg#). At 26 GPa, peridotite liquids show a crystallisation sequence of ferropericlase (Fp) followed …
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Assessing Associations of Suicide with Socioeconomic Status and Social Isolation
… (Beautrais et al. 1997; Cohen et al. 2019), the effects of low SES were further hypothesized to be aggravated in individuals with high SI levels (SES x SI interaction). In order to test the hypotheses, all 149.033 suicide deaths between 1997 and 2010 (T = 14 years) were extracted from the …
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Iron oxidation in (Mg,Fe)0: Calibration of the Flank method on synthetic samples and applications on natural inclusions from lower mantle diamonds
… in a multi anvil apparatus. In order to avoid compositional effects on flank method measurements, the high sample homogeneity was essential. Moreover, the determination of the Fe3+/Fetot ratio needed to be extremely accurate. For this purpose, a more accurate procedure for fitting the Mössbauer …
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Structural relaxations and crystallization in amorphous food model formulations
… systems. S gives a quantitative tool to estimate compositional effects on τ and for the control of time-dependent solids transformations, such as crystallization. Amorphous food solids, such as sugars and proteins, are common ingredients in the food and pharmaceutical industries. Thus, …
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Experimental Determinations and Modelling of the Viscosity of Multicomponent Natural Silicate Melts: Volcanological Implications
… natural silicate melts and constrain the compositional effects which affect such a parameter. The results of this study, relevant to all petrological and volcanological processes which involve some transport mechanism, will be applied to volcanic setting. An extensive experimental study …