813. - Materials and Process Simulation Center
... We report reactive dynamics (RD) studies on: the decomposition of bulk hydrazine (N2H4); the decomposition of bulk monomethyl-hydrazine (CH3N2H3), hereafter referred to simply as methyl-hydrazine; the decomposition of hydrazine in the presence of hydrogen peroxide (H2O2); and decomposition hydrazine ...
... We report reactive dynamics (RD) studies on: the decomposition of bulk hydrazine (N2H4); the decomposition of bulk monomethyl-hydrazine (CH3N2H3), hereafter referred to simply as methyl-hydrazine; the decomposition of hydrazine in the presence of hydrogen peroxide (H2O2); and decomposition hydrazine ...
Conservation of Energy for Unforced Spring
... variable(s) that is constant along a trajectory of the system (in this case, the solution to an ODE). Moreover, they are an important tool for the study of dynamical systems and are especially helpful with the qualitative analysis of non-linear systems. With that in mind, we explore the conservation ...
... variable(s) that is constant along a trajectory of the system (in this case, the solution to an ODE). Moreover, they are an important tool for the study of dynamical systems and are especially helpful with the qualitative analysis of non-linear systems. With that in mind, we explore the conservation ...
Effect of pH on the Electrodeposition of ZnTe Film from a Citric Acid
... XRD patterns of the deposits obtained from various electrolytes. Compositions (at. % Zn) of the deposits determined by EDX are also summarized in this figure. In this 2 range, diffractions from ZnTe(111) (2 ¼ 25:259 for CuK) and/ or Te(101) (2 ¼ 27:562 ) planes may appear. Based on the XRD patte ...
... XRD patterns of the deposits obtained from various electrolytes. Compositions (at. % Zn) of the deposits determined by EDX are also summarized in this figure. In this 2 range, diffractions from ZnTe(111) (2 ¼ 25:259 for CuK) and/ or Te(101) (2 ¼ 27:562 ) planes may appear. Based on the XRD patte ...
Solid-state chemistry of lithium power sources
... band while the mutual repulsions between the Li+ ions rises. The net effect is that the potential will decrease somewhat with increasing Li content; whereas in many systems it turns out that this can be rationalised entirely by considering only the ion repulsions,14 in some cases both ion and electr ...
... band while the mutual repulsions between the Li+ ions rises. The net effect is that the potential will decrease somewhat with increasing Li content; whereas in many systems it turns out that this can be rationalised entirely by considering only the ion repulsions,14 in some cases both ion and electr ...
Solutions - University of Manitoba
... 2. Weigh out 0.8 g of potassium permanganate KMnO4 into beaker #1 and perform the mole calculation in the table. 3. Add enough water to make 100 mL of solution. 4. Stir well until all the KMnO4 is dissolved. 5. Find the molarity of KMnO4 solution #1 and record it in the table. 6. Record the colour i ...
... 2. Weigh out 0.8 g of potassium permanganate KMnO4 into beaker #1 and perform the mole calculation in the table. 3. Add enough water to make 100 mL of solution. 4. Stir well until all the KMnO4 is dissolved. 5. Find the molarity of KMnO4 solution #1 and record it in the table. 6. Record the colour i ...
Oxygen transport through La,_,Sr,FeO,_, membranes. I. Permeation
... immobile and will thus not contribute to oxygen transport. Alternative structural models have been proposed for SrFeO,,, 125,261 and for La,,,Sr,,,FeO,.,,, [21], in which layers of Fe in square pyramidal coordination are separated by two layers of Fe in octahedral coordination. In this structure, th ...
... immobile and will thus not contribute to oxygen transport. Alternative structural models have been proposed for SrFeO,,, 125,261 and for La,,,Sr,,,FeO,.,,, [21], in which layers of Fe in square pyramidal coordination are separated by two layers of Fe in octahedral coordination. In this structure, th ...
An experimentally validated numerical model of interface advance of
... where the terms on the left-hand side of the equation present the mass change in the dehydrated phase over a time span Dt, the first term on the right-hand side is the mass generation from the interface advance and the second term is the mass loss at the outer surface due to diffusion. Overall, Eqs. ...
... where the terms on the left-hand side of the equation present the mass change in the dehydrated phase over a time span Dt, the first term on the right-hand side is the mass generation from the interface advance and the second term is the mass loss at the outer surface due to diffusion. Overall, Eqs. ...
Full-Text PDF
... respectively. As discussed in the next section, Ψ00 is the part of Ψ that determines the admissible range of the electrolyte. Thus, as far as the determination of this range is concerned, Equation (20) enables us to substitute all of the electrolyte additives with just one single, fictitious additiv ...
... respectively. As discussed in the next section, Ψ00 is the part of Ψ that determines the admissible range of the electrolyte. Thus, as far as the determination of this range is concerned, Equation (20) enables us to substitute all of the electrolyte additives with just one single, fictitious additiv ...
STRAIN RATE BEHAVIOUR OF THREE ROCKS IN TENSION E. C
... The fracture processes of rocks are not the same under the static and dynamic types of loading as for concrete [5–7]. The rapid increase in terms of strength with increase in rate of loading has been explained through the impossibility for the weakest links in the rock to participate in the fracturi ...
... The fracture processes of rocks are not the same under the static and dynamic types of loading as for concrete [5–7]. The rapid increase in terms of strength with increase in rate of loading has been explained through the impossibility for the weakest links in the rock to participate in the fracturi ...
Study Guide and Reinforcement
... 9. a way of learning more about the world, that starts with making observations and asking questions 10. applications of theoretical science. It’s what engineers develop. 11. the study of matter ...
... 9. a way of learning more about the world, that starts with making observations and asking questions 10. applications of theoretical science. It’s what engineers develop. 11. the study of matter ...
Spinodal decomposition
Spinodal decomposition is a mechanism for the rapid unmixing of a mixture of liquids or solids from one thermodynamic phase, to form two coexisting phases. As an example, consider a hot mixture of water and an oil. At high temperatures the oil and the water may mix to form a single thermodynamic phase in which water molecules are surrounded by oil molecules and vice versa. The mixture is then suddenly cooled to a temperature at which thermodynamic equilibrium favours an oil-rich phase coexisting with a water-rich phase. Spinodal decomposition then occurs when the mixture is such that there is essentially no barrier to nucleation of the new oil-rich and water-rich phases. In other words, the oil and water molecules immediately start to cluster together into microscopic water-rich and oil-rich clusters throughout the liquid. These clusters then rapidly grow and coalesce until there is a single macroscopic oil-rich cluster, the oil-rich phase, and a single water-rich cluster, the water-rich phase.Spinodal decomposition can be contrasted with nucleation and growth. There the initial formation of the microscopic clusters involves a large free energy barrier, and so can be very slow, and may occur as little as once in the initial phase, not throughout the phase, as happens in spinodal decomposition.Spinodal decomposition is of interest for two primary reasons. In the first place, it is one of the few phase transformations in solids for which there is any plausible quantitative theory. The reason for this is the inherent simplicity of the reaction. Since there is no thermodynamic barrier to the reaction inside of the spinodal region, the decomposition is determined solely by diffusion. Thus, it can be treated purely as a diffusional problem, and many of the characteristics of the decomposition can be described by an approximate analytical solution to the general diffusion equation.In contrast, theories of nucleation and growth have to invoke the thermodynamics of fluctuations. And the diffusional problem involved in the growth of the nucleus is far more difficult to solve, because it is unrealistic to linearize the diffusion equation.From a more practical standpoint, spinodal decomposition provides a means of producing a very finely dispersed microstructure that can significantly enhance the physical properties of the material.