Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"MAX Phases"”.
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The Irradiation Tolerance of Zirconium-based MAX Phases
Recent developments in the synthesis of MAX phases have successfully introduced phases incorporating zirconium. These materials have been nominated for applications that experience high temperatures and irradiation damage. In this work, two newly synthesised zirconium-based MAX phases were …
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MAX phases as an electrocatalyst support material: a DFT study
… being sought. A new class of material, called MAX phases, shows potential because some possess a combination of properties of metals and ceramics. Three of them, Ti2AlC, Ti3AlC2, and Ti3SiC2, show good electrical conductivity and oxidation resistance. These MAX phases have been investigated …
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Synthesis of Ti₂AlC, Ti₃AlC₂ and Ti₃SiC₂ MAX phase ceramics; and their composites with c-BN
MAX phase ceramics are ternary ceramics with both metallic and ceramic properties. The existing backing materials in grinding wheels can be made of ceramics or metals. In these applications, ceramics have the disadvantage of low toughness, and most metals have the disadvantages of relatively high …
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On the Plasticity of Layered Crystals
… processes. A model system in this regard are the MAX phases, ternary carbides and nitrides with a hexagonal layered crystal structure, which show a critical resolved shear stress for basal plane slip of as low as 77 MPa. A possible explanation for this unusual ductility was proposed on the basis …
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Plastic Deformation in Complex Crystal Structures
… applications, but the use of many such phases is limited by low toughness. Even outside structural applications, brittle failure is a primary cause of failure in coatings and device materials and, therefore, improved toughness is desirable. In complex crystals plasticity, and hence …
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Electronic structure and optical properties of layered ternary transition-metal carbides and nitrides
… and nitrides are also commonly referred to as "MAX phases". Trends were observed for the calculated density of states (DOS) at Fermi-level, with respect to elemental variations and number of M and X layers. A local minimum of DOS(Ef) was found for Ti3AlC2, Ti2InC and Cr2AlC, predicting …
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Influence of synthesis parameters on the properties of MXenes: a comparative study of ammonium bifluoride and HCl-LiF etching methods for membrane reactor applications
… class of two-dimensional materials derived from MAX phases, hold immense potential for applications in membrane technology due to their unique structural and functional properties. This thesis explores the synthesis of MXenes from Ti3AlC2 MAX phase using various etching methods, including NH4HF2, …
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Synthesis, characterization and chemistry of two-dimensional transition metal carbides and nitrides (MXenes)
… in 2011 from bulk layered crystalline MAX phases. Because of their 2D structure and unique combination of high conductivity and hydrophilicity, MXenes have raised a significant interest for various applications. However, it has been found that in some cases colloidal MXene flakes are …
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MULTIFUNCTIONAL BEHAVIORS OF TWO-DIMENSIONAL MATERIALS AND THEIR COMPOSITES
… the layered carbides and /or nitrides known as MAX phases, which introduce MXenes with rich terminal groups (e.g. -O-, -OH, -F).</p> <p>During my Ph.D. study, firstly, the adhesive and frictional behaviors, which are related to successful film transfer and shear force transmission of 2D …
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Ti3C2Tx as an Advanced Support Material for Polymer Electrolyte Fuel Cell Catalysts to Facilitate the Oxygen Reduction Reaction
… resistance to oxidation of the many different MAX phases. The synthesis of high (>50 m2 g -1 ), specific surface area, delaminated Ti3C2Tx flakes was attempted first with mild in-situ HF conditions. While this method could both etch and delaminate flakes in a single stage, because the flake …
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Productivity and ecosystem services from purpose-grown energy crops
… rotations with frequent corn (Zea mays) phases and $88 Mg-1 for rotations with frequent soybean (Glycine max) phases. To promote widespread adoption and potentially increase incomes through monetizing ecosystem services, a three-year study suggests field-scale switchgrass replacing corn …