[{"article_number":"120326","language":[{"iso":"eng"}],"_id":"57954","department":[{"_id":"286"},{"_id":"15"}],"user_id":"77496","status":"public","publication":"Acta Materialia","type":"journal_article","title":"Die steel design for additive manufacturing","doi":"10.1016/j.actamat.2024.120326","publisher":"Elsevier BV","date_updated":"2025-01-22T09:06:37Z","volume":284,"date_created":"2025-01-06T11:31:51Z","author":[{"last_name":"Hengsbach","full_name":"Hengsbach, Florian","first_name":"Florian"},{"full_name":"Bürger, Julius","last_name":"Bürger","first_name":"Julius"},{"first_name":"Anatolii","full_name":"Andreiev, Anatolii","last_name":"Andreiev"},{"full_name":"Biggs, Krista","last_name":"Biggs","first_name":"Krista"},{"first_name":"Jörg","full_name":"Fischer-Bühner, Jörg","last_name":"Fischer-Bühner"},{"first_name":"Jörg K.N","last_name":"Lindner","full_name":"Lindner, Jörg K.N"},{"first_name":"Kay-Peter","last_name":"Hoyer","full_name":"Hoyer, Kay-Peter"},{"full_name":"Olson, Gregory B.","last_name":"Olson","first_name":"Gregory B."},{"last_name":"Schaper","full_name":"Schaper, Mirko","first_name":"Mirko"}],"year":"2024","intvolume":"       284","citation":{"ama":"Hengsbach F, Bürger J, Andreiev A, et al. Die steel design for additive manufacturing. <i>Acta Materialia</i>. 2024;284. doi:<a href=\"https://doi.org/10.1016/j.actamat.2024.120326\">10.1016/j.actamat.2024.120326</a>","ieee":"F. Hengsbach <i>et al.</i>, “Die steel design for additive manufacturing,” <i>Acta Materialia</i>, vol. 284, Art. no. 120326, 2024, doi: <a href=\"https://doi.org/10.1016/j.actamat.2024.120326\">10.1016/j.actamat.2024.120326</a>.","chicago":"Hengsbach, Florian, Julius Bürger, Anatolii Andreiev, Krista Biggs, Jörg Fischer-Bühner, Jörg K.N Lindner, Kay-Peter Hoyer, Gregory B. Olson, and Mirko Schaper. “Die Steel Design for Additive Manufacturing.” <i>Acta Materialia</i> 284 (2024). <a href=\"https://doi.org/10.1016/j.actamat.2024.120326\">https://doi.org/10.1016/j.actamat.2024.120326</a>.","bibtex":"@article{Hengsbach_Bürger_Andreiev_Biggs_Fischer-Bühner_Lindner_Hoyer_Olson_Schaper_2024, title={Die steel design for additive manufacturing}, volume={284}, DOI={<a href=\"https://doi.org/10.1016/j.actamat.2024.120326\">10.1016/j.actamat.2024.120326</a>}, number={120326}, journal={Acta Materialia}, publisher={Elsevier BV}, author={Hengsbach, Florian and Bürger, Julius and Andreiev, Anatolii and Biggs, Krista and Fischer-Bühner, Jörg and Lindner, Jörg K.N and Hoyer, Kay-Peter and Olson, Gregory B. and Schaper, Mirko}, year={2024} }","short":"F. Hengsbach, J. Bürger, A. Andreiev, K. Biggs, J. Fischer-Bühner, J.K.N. Lindner, K.-P. Hoyer, G.B. Olson, M. Schaper, Acta Materialia 284 (2024).","mla":"Hengsbach, Florian, et al. “Die Steel Design for Additive Manufacturing.” <i>Acta Materialia</i>, vol. 284, 120326, Elsevier BV, 2024, doi:<a href=\"https://doi.org/10.1016/j.actamat.2024.120326\">10.1016/j.actamat.2024.120326</a>.","apa":"Hengsbach, F., Bürger, J., Andreiev, A., Biggs, K., Fischer-Bühner, J., Lindner, J. K. N., Hoyer, K.-P., Olson, G. B., &#38; Schaper, M. (2024). Die steel design for additive manufacturing. <i>Acta Materialia</i>, <i>284</i>, Article 120326. <a href=\"https://doi.org/10.1016/j.actamat.2024.120326\">https://doi.org/10.1016/j.actamat.2024.120326</a>"},"publication_identifier":{"issn":["1359-6454"]},"publication_status":"published"},{"citation":{"bibtex":"@article{Elizabeth_Conradi_K. Sahoo_Kodalle_A. Kaufmann_Kühne_Mirhosseini_Abou-Ras_Mönig_2020, title={Correlating facet orientation, defect-level density and dipole layer formation at the surface of polycrystalline CuInSe2 thin films}, volume={200}, DOI={<a href=\"https://doi.org/10.1016/j.actamat.2020.09.028\">https://doi.org/10.1016/j.actamat.2020.09.028</a>}, journal={Acta Materialia}, author={Elizabeth, Amala and Conradi, Hauke and K. Sahoo, Sudhir and Kodalle, Tim and A. Kaufmann, Christian and Kühne, Thomas and Mirhosseini, Hossein and Abou-Ras, Daniel and Mönig, Harry}, year={2020} }","short":"A. Elizabeth, H. Conradi, S. K. Sahoo, T. Kodalle, C. A. Kaufmann, T. Kühne, H. Mirhosseini, D. Abou-Ras, H. Mönig, Acta Materialia 200 (2020).","mla":"Elizabeth, Amala, et al. “Correlating Facet Orientation, Defect-Level Density and Dipole Layer Formation at the Surface of Polycrystalline CuInSe2 Thin Films.” <i>Acta Materialia</i>, vol. 200, 2020, doi:<a href=\"https://doi.org/10.1016/j.actamat.2020.09.028\">https://doi.org/10.1016/j.actamat.2020.09.028</a>.","apa":"Elizabeth, A., Conradi, H., K. Sahoo, S., Kodalle, T., A. Kaufmann, C., Kühne, T., … Mönig, H. (2020). Correlating facet orientation, defect-level density and dipole layer formation at the surface of polycrystalline CuInSe2 thin films. <i>Acta Materialia</i>, <i>200</i>. <a href=\"https://doi.org/10.1016/j.actamat.2020.09.028\">https://doi.org/10.1016/j.actamat.2020.09.028</a>","ama":"Elizabeth A, Conradi H, K. Sahoo S, et al. Correlating facet orientation, defect-level density and dipole layer formation at the surface of polycrystalline CuInSe2 thin films. <i>Acta Materialia</i>. 2020;200. doi:<a href=\"https://doi.org/10.1016/j.actamat.2020.09.028\">https://doi.org/10.1016/j.actamat.2020.09.028</a>","chicago":"Elizabeth, Amala, Hauke Conradi, Sudhir K. Sahoo, Tim Kodalle, Christian A. Kaufmann, Thomas Kühne, Hossein Mirhosseini, Daniel Abou-Ras, and Harry Mönig. “Correlating Facet Orientation, Defect-Level Density and Dipole Layer Formation at the Surface of Polycrystalline CuInSe2 Thin Films.” <i>Acta Materialia</i> 200 (2020). <a href=\"https://doi.org/10.1016/j.actamat.2020.09.028\">https://doi.org/10.1016/j.actamat.2020.09.028</a>.","ieee":"A. Elizabeth <i>et al.</i>, “Correlating facet orientation, defect-level density and dipole layer formation at the surface of polycrystalline CuInSe2 thin films,” <i>Acta Materialia</i>, vol. 200, 2020."},"intvolume":"       200","year":"2020","publication_identifier":{"issn":["1359-6454"]},"doi":"https://doi.org/10.1016/j.actamat.2020.09.028","title":"Correlating facet orientation, defect-level density and dipole layer formation at the surface of polycrystalline CuInSe2 thin films","date_created":"2020-10-01T09:19:55Z","author":[{"full_name":"Elizabeth, Amala","last_name":"Elizabeth","first_name":"Amala"},{"last_name":"Conradi","full_name":"Conradi, Hauke","first_name":"Hauke"},{"last_name":"K. Sahoo","full_name":"K. Sahoo, Sudhir","first_name":"Sudhir"},{"last_name":"Kodalle","full_name":"Kodalle, Tim","first_name":"Tim"},{"last_name":"A. Kaufmann","full_name":"A. Kaufmann, Christian","first_name":"Christian"},{"last_name":"Kühne","full_name":"Kühne, Thomas","id":"49079","first_name":"Thomas"},{"id":"71051","full_name":"Mirhosseini, Hossein","last_name":"Mirhosseini","orcid":"https://orcid.org/0000-0001-6179-1545","first_name":"Hossein"},{"first_name":"Daniel","last_name":"Abou-Ras","full_name":"Abou-Ras, Daniel"},{"full_name":"Mönig, Harry","last_name":"Mönig","first_name":"Harry"}],"volume":200,"date_updated":"2022-01-06T06:54:13Z","status":"public","abstract":[{"text":"Individual grains of chalcopyrite solar cell absorbers can facet in different crystallographic directions at their surfaces. To gain a deeper understanding of the junction formation in these devices, we correlate variations in the surface facet orientation with the defect electronic properties. We use a combined analytical approach based on scanning tunneling spectroscopy (STS), scanning electron microscopy, and electron back scatter diffraction (EBSD), where we perform these experiments on identical surface areas as small as 2 × 2 µm2 with a lateral resolution well below 50 nm. The topography of the absorber surfaces indicates two main morphological features: micro-faceted, long basalt-like columns and their short nano-faceted terminations. Our STS results reveal that the long columns exhibit spectral signatures typical for the presence of pronounced oxidation-induced surface dipoles in conjunction with an increased density of electronic defect levels. In contrast, the nano-faceted terminations of the basalt-like columns are largely passivated in terms of electronic defect levels within the band gap region. Corresponding crystallographic data based on EBSD experiments show that the surface of the basalt-like columns can be assigned to intrinsically polar facet orientations, while the passivated terminations are assigned to non-polar planes. Ab-initio calculations suggest that the polar surfaces are more prone to oxidation and resulting O-induced defects, in comparison to non-polar planes. Our results emphasize the correlation between morphology, surface facet orientations and surface electronic properties. Furthermore, this work aids in gaining a fundamental understanding of oxidation induced lateral inhomogeneities in view of the p-n junction formation in chalcopyrite thin-film solar cells.","lang":"eng"}],"type":"journal_article","publication":"Acta Materialia","language":[{"iso":"eng"}],"keyword":["Chalcopyrite absorber","Scanning tunneling spectroscopy","Electron backscatter diffraction","Density functional theory","Surface dipole"],"user_id":"71692","department":[{"_id":"613"}],"project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"19823"},{"ddc":["530"],"language":[{"iso":"eng"}],"abstract":[{"text":"The challenge of designing new tunable nonlinear dielectric materials with tailored properties has attracted an increasing amount of interest recently. Herein, we study the effective nonlinear dielectric response of a stochastic paraelectric-dielectric composite consisting of equilibrium distributions of circular and partially penetrable disks (or parallel, infinitely long, identical, partially penetrable, circular cylinders) of a dielectric phase randomly dispersed in a continuous matrix of a paraelectric phase. The random microstructures were generated using the Metropolis Monte Carlo algorithm. The evaluation of the effective permittivity and tunability were carried out by employing either a Landau thermodynamic model or its Johnson’s approximation to describe the field-dependent permittivity of the paraelectric phase and solving continuum-electrostatics equations using finite element calculations. We reveal that the percolation threshold in this composite governs the critical behavior of the effective permittivity and tunability. For microstructures below the percolation threshold, our simulations demonstrate a strong nonlinear behaviour of the field-dependent effective permittivity and very high tunability that increases as a function of dielectric phase concentration. Above the percolation threshold, the effective permittivity shows the tendency to linearization and the tunability dramatically drops down. The highly reduced permittivity and extraordinarily high tunability are obtained for the composites with dielectric impenetrable disks at high concentrations, in which the triggering of the percolation transition is avoided. The reported results cast light on distinct nonlinear behaviour of 2D and 3D stochastic composites and can guide the design of novel composites with the controlled morphology and tailored permittivity and tunability.","lang":"eng"}],"file":[{"creator":"fossie","date_created":"2020-10-30T13:52:58Z","date_updated":"2020-10-30T13:52:58Z","file_id":"20234","file_name":"2020-10 Myroshnychenko - Acta Material (accepted preprint)_compressed.pdf","access_level":"open_access","title":"(Accepted Preprint)","file_size":3934721,"content_type":"application/pdf","relation":"main_file"}],"publication":"Acta Materialia","title":"Nonlinear dielectric properties of random paraelectric-dielectric composites","date_created":"2020-10-30T13:51:42Z","year":"2020","file_date_updated":"2020-10-30T13:52:58Z","_id":"20233","project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"department":[{"_id":"61"},{"_id":"230"}],"user_id":"158","status":"public","type":"journal_article","doi":"10.1016/j.actamat.2020.10.051","oa":"1","date_updated":"2022-01-06T06:54:24Z","volume":203,"author":[{"full_name":"Myroshnychenko, Viktor","id":"46371","last_name":"Myroshnychenko","first_name":"Viktor"},{"first_name":"Stanislav","full_name":"Smirnov, Stanislav","last_name":"Smirnov"},{"first_name":"Pious Mathews Mulavarickal","full_name":"Jose, Pious Mathews Mulavarickal","last_name":"Jose"},{"first_name":"Christian","full_name":"Brosseau, Christian","last_name":"Brosseau"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158","first_name":"Jens"}],"intvolume":"       203","page":"116432","citation":{"ama":"Myroshnychenko V, Smirnov S, Jose PMM, Brosseau C, Förstner J. Nonlinear dielectric properties of random paraelectric-dielectric composites. <i>Acta Materialia</i>. 2020;203:116432. doi:<a href=\"https://doi.org/10.1016/j.actamat.2020.10.051\">10.1016/j.actamat.2020.10.051</a>","ieee":"V. Myroshnychenko, S. Smirnov, P. M. M. Jose, C. Brosseau, and J. Förstner, “Nonlinear dielectric properties of random paraelectric-dielectric composites,” <i>Acta Materialia</i>, vol. 203, p. 116432, 2020.","chicago":"Myroshnychenko, Viktor, Stanislav Smirnov, Pious Mathews Mulavarickal Jose, Christian Brosseau, and Jens Förstner. “Nonlinear Dielectric Properties of Random Paraelectric-Dielectric Composites.” <i>Acta Materialia</i> 203 (2020): 116432. <a href=\"https://doi.org/10.1016/j.actamat.2020.10.051\">https://doi.org/10.1016/j.actamat.2020.10.051</a>.","short":"V. Myroshnychenko, S. Smirnov, P.M.M. Jose, C. Brosseau, J. Förstner, Acta Materialia 203 (2020) 116432.","bibtex":"@article{Myroshnychenko_Smirnov_Jose_Brosseau_Förstner_2020, title={Nonlinear dielectric properties of random paraelectric-dielectric composites}, volume={203}, DOI={<a href=\"https://doi.org/10.1016/j.actamat.2020.10.051\">10.1016/j.actamat.2020.10.051</a>}, journal={Acta Materialia}, author={Myroshnychenko, Viktor and Smirnov, Stanislav and Jose, Pious Mathews Mulavarickal and Brosseau, Christian and Förstner, Jens}, year={2020}, pages={116432} }","mla":"Myroshnychenko, Viktor, et al. “Nonlinear Dielectric Properties of Random Paraelectric-Dielectric Composites.” <i>Acta Materialia</i>, vol. 203, 2020, p. 116432, doi:<a href=\"https://doi.org/10.1016/j.actamat.2020.10.051\">10.1016/j.actamat.2020.10.051</a>.","apa":"Myroshnychenko, V., Smirnov, S., Jose, P. M. M., Brosseau, C., &#38; Förstner, J. (2020). Nonlinear dielectric properties of random paraelectric-dielectric composites. <i>Acta Materialia</i>, <i>203</i>, 116432. <a href=\"https://doi.org/10.1016/j.actamat.2020.10.051\">https://doi.org/10.1016/j.actamat.2020.10.051</a>"},"publication_identifier":{"issn":["1359-6454"]},"has_accepted_license":"1","publication_status":"published"}]