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- https://eng.libretexts.org/Bookshelves/Materials_Science/TLP_Library_I/31%3A_Fuel_Cells/31.5%3A_Solid_Oxide_Fuel_Cells_(SOFCs)The big advantage of the SOFC over the MCFC is that the electrolyte is solid and there are no pumps required to circulate the hot electrolyte. The operating temperature is between 600 and 1000 °C, dep...The big advantage of the SOFC over the MCFC is that the electrolyte is solid and there are no pumps required to circulate the hot electrolyte. The operating temperature is between 600 and 1000 °C, depending on the generation of the fuel cell (first, second and third, with decreasing operating temperature). The oxide ions diffuse through the electrolyte to the fuel rich and porous anode, where they react with the fuel (hydrogen) and give off electrons to an external circuit.
- https://eng.libretexts.org/Bookshelves/Materials_Science/TLP_Library_I/30%3A_Finite_Element_Method/30.2%3A_Nodes_Elements_Degrees_of_Freedom_and_Boundary_ConditionsThe most common are shown in the figure below, along with the position of the nodes, where It can be seen that some of the elements have “midside” nodes – i.e. They fall in to three categories: Dirich...The most common are shown in the figure below, along with the position of the nodes, where It can be seen that some of the elements have “midside” nodes – i.e. They fall in to three categories: Dirichlet conditions – where you prescribe the variable for which you are solving; Neumann conditions – where you prescribe a flux, which is the gradient of the dependent variable, and Robin conditions – which is a mixture of the two, where a relation between the variable and its gradient is prescribed.
- https://eng.libretexts.org/Bookshelves/Materials_Science/TLP_Library_I/12%3A_Creep_Deformation_of_Metals/12.01%3A_Section_1-Thus, for tensile tests, the tertiary regime may actually be a consequence of the fact that the true stress is rising throughout the test, with the rate of increase becoming greater towards the end of...Thus, for tensile tests, the tertiary regime may actually be a consequence of the fact that the true stress is rising throughout the test, with the rate of increase becoming greater towards the end of the test.
- https://eng.libretexts.org/Bookshelves/Materials_Science/TLP_Library_I/01%3A_Analysis_of_Deformation_Processes/1.03%3A_Slip_Line_Field_TheoryThis approach is used to model plastic deformation in plane strain only for a solid that can be represented as a rigid-plastic body. Elasticity is not included and the loading has to be quasi-static. ...This approach is used to model plastic deformation in plane strain only for a solid that can be represented as a rigid-plastic body. Elasticity is not included and the loading has to be quasi-static. In terms of applications, the approach now has been largely superseded by finite element modelling, as this is not constrained in the same way and for which there are now many commercial packages designed for complex loading (including static and dynamic forces plus temperature variations).
- https://eng.libretexts.org/Bookshelves/Materials_Science/TLP_Library_I/28%3A_Ferroelectric_Materials/28.8%3A_Barium_TitanateCooling through 120°C causes the cubic phase of barium titanate to transform to a tetragonal phase with the lengthening of the c lattice parameter (and a corresponding reduction in a and b). The dipol...Cooling through 120°C causes the cubic phase of barium titanate to transform to a tetragonal phase with the lengthening of the c lattice parameter (and a corresponding reduction in a and b). The dipole moment may be considered to arise primarily due to the movement of Ti atoms with respect to the O atoms in the same plane, but the movement of the other O atoms (i.e.
- https://eng.libretexts.org/Bookshelves/Materials_Science/TLP_Library_II/11%3A_Optimization_of_Materials_Properties_in_Living_Systems/11.7%3A_SummaryYou should now be aware of how to choose a shortlist of materials suitable for a specific application, and be able to decide which material out of a selection is most suited to a particular purpose. H...You should now be aware of how to choose a shortlist of materials suitable for a specific application, and be able to decide which material out of a selection is most suited to a particular purpose. However, you should also be aware of the limitations of merit indices and materials-selection maps for choosing a material and be able to think of other practical considerations involved.
- https://eng.libretexts.org/Bookshelves/Materials_Science/TLP_Library_I/06%3A_Batteries/6.04%3A_Primary_batteriesThe cell electrochemical reactions are not easily reversible and cell is operated until the active components in the electrodes are exhausted. Generally primary batteries have a higher capacity and in...The cell electrochemical reactions are not easily reversible and cell is operated until the active components in the electrodes are exhausted. Generally primary batteries have a higher capacity and initial voltage than rechargeable batteries. Good high and low-temperature performance; good shelf life High Energy density, good high rate performance High energy density; best low-temperature performance; long shelf life High energy density; good low-temperature performance; cost effective
- https://eng.libretexts.org/Bookshelves/Materials_Science/TLP_Library_I/01%3A_Analysis_of_Deformation_Processes/1.08%3A_Deeper_QuestionsThe diagram below shows a possible deformation pattern for the direct plane-strain extrusion of a metal slab, initially 40 mm thick, through a symmetrical 45° tapering die, with an extrusion ratio of ...The diagram below shows a possible deformation pattern for the direct plane-strain extrusion of a metal slab, initially 40 mm thick, through a symmetrical 45° tapering die, with an extrusion ratio of 2.The diagram shows half the deformation pattern and the angles BCD and CBD are both 45°. The distance AB is 15 mm. If the extrusion process is frictionless, energy is only dissipated on PQ and QR, so applying the usual work formula, we have, per unit depth into the plane of the paper,
- https://eng.libretexts.org/Bookshelves/Materials_Science/TLP_Library_I/27%3A_Examination_of_a_Manufactured_ArticleThis TLP provides an introduction to the deconstruction and investigation of the materials and processes used in an everyday item or article.
- https://eng.libretexts.org/Bookshelves/Materials_Science/TLP_Library_II/17%3A_Powder_Processing/17.8%3A_Powder_Consolidation_by_Cold_PRessing_and_SinteringThis figure highlights an important point, which is that, while both types of diffusion cause growth of necks (via transport of material to regions of high surface curvature), raising the strength of ...This figure highlights an important point, which is that, while both types of diffusion cause growth of necks (via transport of material to regions of high surface curvature), raising the strength of the compact, only internal diffusion leads to densification (ie movement of the centres of particles towards each other).
- https://eng.libretexts.org/Bookshelves/Materials_Science/TLP_Library_I/20%3A_Diffusion/20.05%3A_Microstructural_Effects
