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      High-throughput exploration of thermoelectric and mechanical properties of amorphous NbO2 with transition metal additions

      1 , 1 , 1

      Journal of Applied Physics

      AIP Publishing

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          Most cited references 71

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          Generalized Gradient Approximation Made Simple

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            An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments

            The indentation load-displacement behavior of six materials tested with a Berkovich indenter has been carefully documented to establish an improved method for determining hardness and elastic modulus from indentation load-displacement data. The materials included fused silica, soda–lime glass, and single crystals of aluminum, tungsten, quartz, and sapphire. It is shown that the load–displacement curves during unloading in these materials are not linear, even in the initial stages, thereby suggesting that the flat punch approximation used so often in the analysis of unloading data is not entirely adequate. An analysis technique is presented that accounts for the curvature in the unloading data and provides a physically justifiable procedure for determining the depth which should be used in conjunction with the indenter shape function to establish the contact area at peak load. The hardnesses and elastic moduli of the six materials are computed using the analysis procedure and compared with values determined by independent means to assess the accuracy of the method. The results show that with good technique, moduli can be measured to within 5%.
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              Complex thermoelectric materials.

              Thermoelectric materials, which can generate electricity from waste heat or be used as solid-state Peltier coolers, could play an important role in a global sustainable energy solution. Such a development is contingent on identifying materials with higher thermoelectric efficiency than available at present, which is a challenge owing to the conflicting combination of material traits that are required. Nevertheless, because of modern synthesis and characterization techniques, particularly for nanoscale materials, a new era of complex thermoelectric materials is approaching. We review recent advances in the field, highlighting the strategies used to improve the thermopower and reduce the thermal conductivity.
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                Author and article information

                Journal
                Journal of Applied Physics
                Journal of Applied Physics
                AIP Publishing
                0021-8979
                1089-7550
                July 28 2016
                July 28 2016
                : 120
                : 4
                : 045104
                Affiliations
                [1 ]Materials Chemistry, RWTH Aachen University, Kopernikusstr. 10, 52074 Aachen, Germany
                Article
                10.1063/1.4959608
                b24d824a-9432-4594-83b8-136ec5ecf202
                © 2016
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