<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>1332</id>
    <completedYear>2019</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>111191L-1</pageFirst>
    <pageLast>111191L-6</pageLast>
    <pageNumber>111191L</pageNumber>
    <edition/>
    <issue>11119</issue>
    <volume>2019</volume>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>Max-Planck-Institut für Extraterrestrische Physik</creatingCorporation>
    <contributingCorporation>Technische Hochschule Aschaffenburg</contributingCorporation>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2019-09-20</completedDate>
    <publishedDate>2019-09-09</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">X-ray reflectivity measurements at chromium-iridium tri-layer coatings</title>
    <abstract language="eng">Studying astronomical objects in the X-ray regime, iridium-based layer systems are highly effective reflective&#13;
materials for telescopes mirrors. Aschaffenburg University and the Czech Technical University in Prague jointly developed stress compensated chromium-iridium coatings. To overcome the disturbing reflectivity reduction of the iridium absorption edge around 2 keV photon energy and improve general reflectivity at lower incident energies, thin overcoat layers of chromium have been applied in addition. Corresponding measurements at several X-ray lines have been performed on these samples at the PANTER test facility of the Max-Planck Institute for&#13;
extraterrestrial Physics. A part of the experimental results and their comparison with theoretical simulations&#13;
are presented in this contribution.</abstract>
    <parentTitle language="eng">Proceedings of SPIE</parentTitle>
    <identifier type="doi">http://dx.doi.org/10.1117/12.2530439</identifier>
    <enrichment key="copyright">1</enrichment>
    <licence>Keine Lizenz - es gilt das deutsche Urheberrecht</licence>
    <author>Veronika Stehlikova</author>
    <author>Thorsten Döhring</author>
    <author>Tobias Schäfer</author>
    <author>Manfred Stollenwerk</author>
    <author>Peter Friedrich</author>
    <author>Vadim Burwitz</author>
    <author>Gisela Hartner</author>
    <author>Miranda Bradshaw</author>
    <author>Yingyu Liao</author>
    <author>Carlo Pelliciari</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>iridium</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>mirror</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>coating</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>reflectivity</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>X-ray</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>swd</type>
      <value>Röntgenastronomie</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>swd</type>
      <value>Röntgenteleskop</value>
    </subject>
    <collection role="forschungsschwerpunkte" number="">Innovative Material Processing</collection>
    <collection role="forschungsschwerpunkte" number="">Material Testing &amp; Sensor Technology</collection>
  </doc>
  <doc>
    <id>1787</id>
    <completedYear>2021</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>11</pageLast>
    <pageNumber/>
    <edition/>
    <issue>2021</issue>
    <volume>2021</volume>
    <type>article</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation>German Aerospace Center (DLR), Hardthausen</contributingCorporation>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-03-01</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Sputtered highly effective iridium catalysts: a new approach for green satellite propulsion</title>
    <abstract language="eng">This work demonstrated the large potential of sputtered iridium metal for catalytic reactions shown by the example of decomposition of hydrogen peroxide (H2O2) for space propulsion systems. For this purpose, iridium was coated onto Al2O3 pellets by a sputter process under varied process parameters. Depending on previously selected parameters, the obtained metal-loaded pellets offer closed- and/or open-shell structures. Catalytic productivity of these first-generation iridium-sputtered catalysts was estimated in laboratory experiments and compared to platinum-loaded pellets. Under optimized sputter-process conditions, the reactivity is significantly improved compared to the platinum-impregnated pellets. The better catalytic productivity can be explained by the increased active surface area of the iridium layers on the pellets. The surface morphology and the microstructure of the iridium coating can be actively controlled by the sputter pressure. The results are in accordance with the sputtering process pressure tendency described by the Thornton Structure–Zone Model.</abstract>
    <parentTitle language="eng">Journal of Materials Science</parentTitle>
    <identifier type="doi">https://doi.org/10.1007/s10853-021-05897-z</identifier>
    <enrichment key="copyright">1</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <licence>Keine Lizenz - es gilt das deutsche Urheberrecht</licence>
    <author>Manfred Stollenwerk</author>
    <author>Thorsten Döhring</author>
    <author>Dominic Freudenmann</author>
    <author>Tobias Schäfer</author>
    <author>Johannes Stadtmüller</author>
    <author>Nicole Röcke</author>
    <subject>
      <language>deu</language>
      <type>swd</type>
      <value>Iridium</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>swd</type>
      <value>Katalysator</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>swd</type>
      <value>Satellitentechnik</value>
    </subject>
    <collection role="forschungsschwerpunkte" number="">Innovative Material Processing</collection>
    <collection role="forschungsschwerpunkte" number="">Material Testing &amp; Sensor Technology</collection>
  </doc>
</export-example>
