Výsledky vyhledávání - "Christian Wilhelmi"

From CCS-Planning to Testautomation: The Digital Testfield of Deutsche Bahn in Scheibenberg -- A Case Study

Autor: Christoph Klaus, Robert Schmid, Pedro Lehmann Ibáñez, Dirk Friedenberger, Lukas Pirl, Christian Wilhelmi, Torsten Friedrich, Andreas Polze, Gisela Freiin von Arnim, Arne Boockmeyer, Heiko Herholz

Publikováno v: IC2E

The digitalization of railway systems should increase the efficiency of the train operation to achieve future mobility challenges and climate goals. But this digitalization also comes with several new challenges in providing a secure and reliable tra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3dfcfad2048832f2bda8348d552b5222

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Laser surface nanostructuring for reliable Si3N4/Si3N4 and Si3N4/Invar joined components

Autor: Manuela Suess, Laura Gozzelino, Christian Wilhelmi, Milena Salvo, Valentina Casalegno

Publikováno v: Ceramics International. 44:12081-12087

IR pulsed laser radiation in air was applied to Si3N4 and Invar to obtain reliable Si3N4/Si3N4 and Si3N4/Invar adhesive bonded components. The laser pre-treatment produced a homogeneous nanostructured oxide layer on the surfaces, which effectively in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1061c173aa01973031aa83fd92900447
https://doi.org/10.1016/j.ceramint.2018.03.226

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Effect of pulsed laser irradiation on the SiC surface

Autor: Christian Wilhelmi, Valentina Casalegno, Matthias Funke, Manuela Suess, Peter Tatarko, Milena Salvo

Publikováno v: International Journal of Applied Ceramic Technology. 14:313-322

The effect of a pulsed laser irradiation (Nd:YVO4, 1064 nm) in air on the surface morphology and chemical composition of silicon carbide and on the adhesion with an epoxy adhesive was investigated. Scanning and transmission electron microscopies, ato

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00bcc30e4ab2e0c1afe67818a57e8279
https://doi.org/10.1111/ijac.12655

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Joining of ceramic matrix composites to high temperature ceramics for thermal protection systems

Autor: Christian Wilhelmi, C. Jimenez, Elisa Padovano, V. Liedtke, I. Agote, S. Messoloras, Claudio Francesco Badini, J. Barcena, Miguel Lagos, Y. Panayiotatos, P. Yialouris, Konstantina Mergia

Publikováno v: Journal of the European Ceramic Society. 36:443-449

The current work reports a novel approach for the integration of external protective SIC multilayers with ceramic matrix composite (C-f/SiC) with the view of application in aerospace heat protection systems. The integration method is based on diffusi

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https://doi.org/10.1016/j.jeurceramsoc.2015.09.038

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A plasma pre-treatment to improve adhesion on SiC and Si3N4 ceramics

Autor: Christian Wilhelmi, Monica Ferraris, Valentina Casalegno, Sergio Perero, Manuela Suess, Espedito Vassallo, M. Pedroni, Milena Salvo

Publikováno v: Materials letters (Gen. ed.) 272 (2020): 127855-1–127855-4. doi:10.1016/j.matlet.2020.127855
info:cnr-pdr/source/autori:Casalegno V.; Ferraris M.; Perero S.; Suess M.; Wilhelmi C.; Pedroni M.; Vassallo E.; Salvo M./titolo:A plasma pre-treatment to improve adhesion on SiC and Si3N4 ceramics/doi:10.1016%2Fj.matlet.2020.127855/rivista:Materials letters (Gen. ed.)/anno:2020/pagina_da:127855-1/pagina_a:127855-4/intervallo_pagine:127855-1–127855-4/volume:272

The design of interfaces, coupled with suitable joining materials and joining technologies, is a key parameter in component manufacturing and surface pre-treatments are crucial steps for the production of robust and reliable bonds. In this work, plas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b457b5e4a4fe21c9679ee7100b508a5
https://doi.org/10.1016/j.matlet.2020.127855

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Preparation and characterization of ZrB2 and TaC containing Cf/SiC composites via Polymer-Infiltration-Pyrolysis process

Autor: Franziska Uhlmann, Christian Wilhelmi, Steffen Beyer, Stephan Schmidt-Wimmer, Claudio Francesco Badini, Elisa Padovano

To improve the thermo-chemical resistance of PIP–C f /SiC composites, the SiC matrix is modified by adding ZrB 2 and Ta powder to the pre-ceramic slurry to form C f /SiC–ZrB 2 –TaC composites. Within this study the modified composites are inves

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2037d78eaadc052589f28cde86f8af55
http://hdl.handle.net/11583/2701511

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Influence of heat treatment and fiber orientation on the damage threshold and the fracture behavior of Nextel fiber-reinforced Mullite-SiOC matrix composites analysed by acoustic emission monitoring

Autor: Kurosch Rezwan, Kamen Tushtev, A. Dentel, Eike Volkmann, Christian Wilhelmi

Publikováno v: Journal of Materials Science. 49:7890-7899

In the present study, we elucidate the influence of oxidative heat exposures at 1000 and 1200 °C on an alumina fiber-reinforced polymer-derived ceramic matrix composite containing small residual amounts of carbon. Therefore, we investigated the flex

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d547006e470e92f7c9d890ee0e3b501f
https://doi.org/10.1007/s10853-014-8501-z

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