<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>32544</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>2095</pageFirst>
    <pageLast>2099</pageLast>
    <pageNumber/>
    <edition/>
    <issue>17</issue>
    <volume>29</volume>
    <type>article</type>
    <publisherName>Materials Research Society</publisherName>
    <publisherPlace>Warrendale, Pa.</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Strategies for the selective volume sintering of ceramics</title>
    <abstract language="eng">The present study is dealing with the basic physics for a novel way to generate a free-formed ceramic body, not like common layer by layer, but directly by Selective Volume Sintering (SVS) in a compact block of ceramic powder. To penetrate with laser light into the volume of a ceramic powder compact it is necessary to investigate the light scattering properties of ceramic powders. Compared with polymers and metals, ceramic materials are unique as they offer a wide optical window of transparency. The optical window typically ranges from below 0.3 up to 5 µm wave length. In the present study thin layers of quartz glass (SiO2) particles have been prepared. As a function of layer thickness and the particle size, transmission and reflection spectra in a wave length range between 0.5 and 2.5 µm have been recorded. Depending on the respective particle size and by choosing a proper relation between particle size and wave length of the incident laser radiation, it is found that light can penetrate a powder compact up to a depth of a few millimeters. With an adjustment of the light absorption properties of the compact the initiation of sintering in the volume of the compact is possible.</abstract>
    <parentTitle language="eng">Journal of materials research</parentTitle>
    <identifier type="old">35613</identifier>
    <identifier type="doi">10.1557/jmr.2014.174</identifier>
    <identifier type="issn">0884-2914</identifier>
    <enrichment key="date_peer_review">12.02.2015</enrichment>
    <author>T. Mühler</author>
    <author>G. Helsch</author>
    <author>J.G. Heinrich</author>
    <author>Dongxu Yao</author>
    <author>S. Gräf</author>
    <author>F.A. Müller</author>
    <author>Jens Günster</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Additive Manufacturing</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>30295</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>7579</pageFirst>
    <pageLast>7582</pageLast>
    <pageNumber/>
    <edition/>
    <issue>5</issue>
    <volume>40</volume>
    <type>article</type>
    <publisherName>Ceramurgia</publisherName>
    <publisherPlace>Faenza</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Rapid fabrication of porous Si3N4/SiC ceramics via nitridation of silicon powder with ZrO2 as catalyst</title>
    <abstract language="eng">Porous Si3N4/SiC ceramics were rapidly prepared with Y2O3 as sintering additive and ZrO2 as nitrided catalyst, using Si and SiC as starting powders. Porous Si3N4/SiC ceramics with 5 wt% ZrO2 addition showed a complete nitridation and good mechanical properties (with a high porosity of 34.96%, flexural strength of 150±4.2 MPa, linear shrinkage of 0.02%). It was revealed that the reciprocal formation of ZrO2 and ZrN effectively enhanced nitridation by inhibiting the melting of silicon in micro-regions.</abstract>
    <parentTitle language="eng">Ceramics international</parentTitle>
    <identifier type="old">33258</identifier>
    <identifier type="doi">10.1016/j.ceramint.2013.11.098</identifier>
    <identifier type="issn">0272-8842</identifier>
    <identifier type="issn">1873-3956</identifier>
    <enrichment key="date_peer_review">06.03.2014</enrichment>
    <author>H.-L. Hu</author>
    <author>Y.-P. Zeng</author>
    <author>Y. Xia</author>
    <author>Dongxu Yao</author>
    <author>K.-H. Zuo</author>
    <author>Jens Günster</author>
    <author>J.G. Heinrich</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>D. ZrO2</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Rapid nitridation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Si3N4/SiC porous ceramics</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>31282</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>371</pageFirst>
    <pageLast>374</pageLast>
    <pageNumber/>
    <edition/>
    <issue>2</issue>
    <volume>33</volume>
    <type>article</type>
    <publisherName>Elsevier</publisherName>
    <publisherPlace>Oxford</publisherPlace>
    <creatingCorporation>European Ceramic Society</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Porous Si3N4 ceramics prepared via partial nitridation and SHS</title>
    <abstract language="eng">Porous Si3N4 ceramics were prepared via partial nitridation and self-propagating high temperature synthesis (SHS) process. Raw Si and additive Y2O3 were mixed and molded under 10 MPa into a compact, the compact was partial nitridation at 1300 °C to form a porous Si/Si3N4, and then it was buried in a Si/Si3N4 bed for SHS to obtain porous Si3N4 with rod-like β-Si3N4 morphology. The processing combined the advantages of the nitridation of Si and SHS with low cost, low shrinkage and time saving. Porous Si3N4 with a porosity of 47%, a strength of 143 MPa were obtained by this method.</abstract>
    <parentTitle language="eng">Journal of the European Ceramic Society</parentTitle>
    <identifier type="old">34289</identifier>
    <identifier type="doi">10.1016/j.jeurceramsoc.2012.08.033</identifier>
    <identifier type="issn">0955-2219</identifier>
    <identifier type="issn">1873-619X</identifier>
    <enrichment key="date_peer_review">01.09.2014</enrichment>
    <author>Dongxu Yao</author>
    <author>Y. Xia</author>
    <author>K.-h. Zuo</author>
    <author>D. Jiang</author>
    <author>Jens Günster</author>
    <author>Y.-P. Zeng</author>
    <author>J.G. Heinrich</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Si3N4</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Strength</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Porosity</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>35177</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>138</pageFirst>
    <pageLast>140</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>141</volume>
    <type>article</type>
    <publisherName>Elsevier B.V.</publisherName>
    <publisherPlace>Amsterdam</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Gradient porous silicon nitride prepared via vacuum foaming and freeze drying</title>
    <abstract language="eng">Gradient porous silicon nitride (Si3N4) was fabricated by a novel vacuum foaming and freeze drying process. Aqueous Si3N4 slurries were foamed at vacuum pressure of 50–90 kPa, the green body was obtained by the freeze drying process, a gradient pore structure with porosities of 72–90% was achieved after pressureless sintering at 1680 °C. The porosity was increased with decreasing vacuum pressure. The pore structure consists of large pores (~100 μm) on top, medium pores (~45 μm) on the wall of the large pores, and small pores (~0.7 μm) in the matrix. Such gradient porous Si3N4 with macro- and micro-pores has potential application as high temperature filters.</abstract>
    <parentTitle language="eng">Materials letters</parentTitle>
    <identifier type="old">38332</identifier>
    <identifier type="doi">10.1016/j.matlet.2014.11.067</identifier>
    <identifier type="issn">0167-577x</identifier>
    <identifier type="issn">1873-4979</identifier>
    <enrichment key="date_peer_review">21.12.2015</enrichment>
    <author>Dongxu Yao</author>
    <author>Y. Xia</author>
    <author>K.-h. Zuo</author>
    <author>Y.-P. Zeng</author>
    <author>D. Jiang</author>
    <author>Jens Günster</author>
    <author>J.G. Heinrich</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Silicon nitride</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Graded</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>32542</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>3461</pageFirst>
    <pageLast>3467</pageLast>
    <pageNumber/>
    <edition/>
    <issue>15</issue>
    <volume>34</volume>
    <type>article</type>
    <publisherName>Elsevier</publisherName>
    <publisherPlace>Oxford</publisherPlace>
    <creatingCorporation>European Ceramic Society</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">The effect of fabrication parameters on the mechanical properties of sintered reaction bonded porous Si3N4 ceramics</title>
    <abstract language="eng">Porous silicon nitride ceramics were prepared via sintered reaction bonded silicon nitride at 1680 °C. The grain size of nitrided Si3N4 and diameter of post-sintered ß-Si3N4 are controlled by size of raw Si. Porosity of 42.14–46.54% and flexural strength from 141 MPa to 165 MPa were obtained. During post-sintering with nano Y2O3 as sintering additive, nano Y2O3 can promote the formation of small ß-Si3N4 nuclei, but the large amount of ß-Si3N4 (&gt;20%) after nitridation also works as nuclei site for precipitation, in consequence the growth of fine ß-Si3N4 grains is restrained, the length is shortened, and the improvement on flexural strength is minimized. The effect of nano SiC on the refinement of the ß-Si3N4 grains is notable because of the pinning effect, while the effect of nano C on the refinement of the ß-Si3N4 grains is not remarkable due to the carbothermal reaction and increase in viscosity of the liquid phase.</abstract>
    <parentTitle language="eng">Journal of the European Ceramic Society</parentTitle>
    <identifier type="old">35611</identifier>
    <identifier type="doi">10.1016/j.jeurceramsoc.2014.06.018</identifier>
    <identifier type="issn">0955-2219</identifier>
    <identifier type="issn">1873-619X</identifier>
    <enrichment key="date_peer_review">12.02.2015</enrichment>
    <author>Dongxu Yao</author>
    <author>Y. Xia</author>
    <author>K.-h. Zuo</author>
    <author>D. Jiang</author>
    <author>Jens Günster</author>
    <author>Y.-P. Zeng</author>
    <author>J.G. Heinrich</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Porous ceramics</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Silicon nitride</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Reaction bonding</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Anisotropic grain growth</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ceramic</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>31283</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>610</pageFirst>
    <pageLast>614</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>265</volume>
    <type>article</type>
    <publisherName>North-Holland</publisherName>
    <publisherPlace>Amsterdam</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Selective laser densification of lithium aluminosilicate glass ceramic tapes</title>
    <abstract language="eng">Tapes, cast by blade deposition of a lithium aluminosilicate glass slurry, were sintered using a YAG-fiber laser, with the aim of finding suitable parameters for an additive manufacturing process based on layer-wise slurry deposition and selective laser densification. The influence of the laser parameters (output power and scan velocity) on the sintering was evaluated, by scanning electron microscopy and by X-ray diffraction, on the basis of the quality of the processed layer. Well densified samples could be obtained only in a small window of values for the output power and the scan velocity. The measurement of the width of a set of single scanned lines allowed also to estimate the minimum resolution of the system along the layer plane.</abstract>
    <parentTitle language="eng">Applied surface science</parentTitle>
    <identifier type="old">34290</identifier>
    <identifier type="doi">10.1016/j.apsusc.2012.11.058</identifier>
    <identifier type="url">http://ac.els-cdn.com/S0169433212020168/1-s2.0-S0169433212020168-main.pdf?_tid=4ba0c92c-31d4-11e4-84f1-00000aab0f02&amp;acdnat=1409575040_15d5256291262aca99cc5321374ab879</identifier>
    <identifier type="issn">0169-4332</identifier>
    <identifier type="issn">1873-5584</identifier>
    <enrichment key="date_peer_review">01.09.2014</enrichment>
    <author>Andrea Zocca</author>
    <author>P. Colombo</author>
    <author>Jens Günster</author>
    <author>T. Mühler</author>
    <author>J.G. Heinrich</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Selective laser sintering (SLS)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laserwise-slurry-deposition (LSD)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Glass-ceramic</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>LAS</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
</export-example>
