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<export-example>
  <doc>
    <id>32983</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2024-03-13</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Investigating the effect of Zr content on electrochemical and tribological properties of newly developed near β-type Ti-alloys (Ti–25Nb-xZr) for biomedical applications</title>
    <abstract language="eng">In order to create alloys with exceptional properties for orthopedic uses, this study focuses on the impact of zirconium (Zr) content on the structural, electrochemical, and tribological qualities of nanostructured Ti–25Nb-xZr [x = 5, 10, 15, 20, 25, and 30 atomic (at.) %] alloys. The structural evolution was investigated using XRD and SEM techniques. The mechanical characteristics of the produced alloys, including Vickers hardness and Young's modulus, were measured. In addition, the corrosion tests were performed using the OCP, EIS, and PD methods in Ringer's solution within the independent pH range at 37 °C. A ball-on-disc tribometer was used to investigate the tribological behavior of the alloys under various loads and wet conditions using the Ringer solution. It has been verified that Zr content (at. %) in the alloys had an impact on their morphologies, structural evolution, and mechanical characteristics. According to the morphological analysis, the particle and crystallite size decreases with increasing Zr content. Young's modulus and Vickers hardness show the same tendency. The EIS data demonstrated that a single passive film formed on the alloy surfaces, and the addition of Zr enhanced the corrosion resistance of the passive films. The polarization curves demonstrate that the alloys had low corrosion current densities and large passive areas without the passive films disintegrating. Likewise, the inclusion of Zr resulted in a reduction in the corrosion and passive current densities values. All of these results suggested that the titanium alloys exhibit a more noble electrochemical activity caused by Zr. From the tribological perspective, it was found that the friction coefficient of the alloys reduced with increasing Zr content.</abstract>
    <parentTitle language="eng">Journal of Science: Advanced Materials and Devices</parentTitle>
    <identifier type="issn">2468-2179</identifier>
    <identifier type="url">https://www.sciencedirect.com/science/article/pii/S2468217924000261</identifier>
    <identifier type="doi">10.1016/j.jsamd.2024.100695</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">100695</enrichment>
    <enrichment key="Publikationsweg">Open Access</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">3 Globaler Wandel und Transformationsprozesse / Global Change and Transformation Processes</enrichment>
    <author>
      <firstName>Mamoun</firstName>
      <lastName>Fellah</lastName>
    </author>
    <submitter>
      <firstName>Aleksei</firstName>
      <lastName>Obrosov</lastName>
    </submitter>
    <author>
      <firstName>Naouel</firstName>
      <lastName>Hezil</lastName>
    </author>
    <author>
      <firstName>Dikra</firstName>
      <lastName>Bouras</lastName>
    </author>
    <author>
      <firstName>Nabila</firstName>
      <lastName>Bouchareb</lastName>
    </author>
    <author>
      <firstName>Alejandro Perez</firstName>
      <lastName>Larios</lastName>
    </author>
    <author>
      <firstName>Aleksei</firstName>
      <lastName>Obrosov</lastName>
    </author>
    <author>
      <firstName>Gamal A.</firstName>
      <lastName>El-Hiti</lastName>
    </author>
    <author>
      <firstName>Sabine</firstName>
      <lastName>Weiß</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ti-Nb-Zr alloys</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanobiomaterials</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Tribological behavior</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Corrosion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ringer's solution</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Biomedical applications</value>
    </subject>
    <collection role="institutes" number="3406">FG Metallkunde und Werkstofftechnik</collection>
  </doc>
  <doc>
    <id>35010</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>12</pageLast>
    <pageNumber>12</pageNumber>
    <edition/>
    <issue>4</issue>
    <volume>51</volume>
    <type>articler</type>
    <publisherName>Elsevier</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2025-01-07</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Microstructural and photocatalytic properties of nanostructured near-β Ti-Nb-Zr alloy for total hip prosthesis use</title>
    <abstract language="eng">With its unique corrosion resistance, light weight, mechanical strength, and biocompatibility, TNZ is a versatile metal alloy that is used in the aerospace and medical industries. The current study aims to investigate the effect of milling time (2, 12, 24, and 36 h) on the nanostructured ternary alloy Ti-25Nb-25Zr (TNZ) prepared by high energy ball milling, a process involving the use of a high-energy ball mill to mix and grind the alloy powders, on its structural, physical, and photocatalytic characterizations. The alloys' characteristics, such as morphology, structural properties, relative density/porosity, surface roughness, hardness, and Young's modulus, were evaluated using SEM, XRD, surface profilometer, and microdurometer, respectively. The photocatalytic characterization was conducted by measuring their absorbance as a function of time using a spectrophotometer of visible and ultraviolet light in the wavelength range of 250–650 nm. Results showed that the crystallite and mean pore size reduced with increasing milling time, with the smallest values of 25 nm and 34 μm, respectively, after 36 h. This indicates that longer milling times result in a more compact and uniform structure, which could enhance the mechanical properties of the alloy. Structural characterization shows that the amount of the β-Ti phase increased with increasing milling time, resulting in the spherical morphology and texturing of the synthesized alloys. The milled alloys' structural evolution and morphological changes were sensitive to their milling times. Also, the relative density, Young's modulus, and hardness increased, reaching values of 89 %, 105 GPa, and 352 HV, respectively, due to grain size decreasing with increasing milling time. This suggests that longer milling times lead to a denser and harder alloy, which could be beneficial for its use in total hip prostheses. The photocatalytical characterization demonstrated that the degradation of orange II (OII) increased with increasing milling time. The Ti-25Nb-25Zr catalyst gave the best degree of degradation, which meant that the decolorization process could be operated rapidly and at a relatively low cost without UV irradiation.</abstract>
    <parentTitle language="eng">Kuwait Journal of Science</parentTitle>
    <identifier type="issn">2307-4116</identifier>
    <identifier type="doi">https://doi.org/10.1016/j.kjs.2024.100276</identifier>
    <enrichment key="Fprofil">2 Gesundheit und Lifes Sciences / Health and Life Sciences</enrichment>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">100276</enrichment>
    <enrichment key="Publikationsweg">Open Access</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <author>
      <firstName>Mamoun</firstName>
      <lastName>Fellah</lastName>
    </author>
    <submitter>
      <firstName>Aleksei</firstName>
      <lastName>Obrosov</lastName>
    </submitter>
    <author>
      <firstName>Naouel</firstName>
      <lastName>Hezil</lastName>
    </author>
    <author>
      <firstName>Dikra</firstName>
      <lastName>Bouras</lastName>
    </author>
    <author>
      <firstName>Majeed Ali</firstName>
      <lastName>Habeeb</lastName>
    </author>
    <author>
      <firstName>Fouzia</firstName>
      <lastName>Hamadi</lastName>
    </author>
    <author>
      <firstName>Nabila</firstName>
      <lastName>Bouchareb</lastName>
    </author>
    <author>
      <firstName>Salah Eddine</firstName>
      <lastName>Laouini</lastName>
    </author>
    <author>
      <firstName>Alejandro Perez</firstName>
      <lastName>Larios</lastName>
    </author>
    <author>
      <firstName>Aleksei</firstName>
      <lastName>Obrosov</lastName>
    </author>
    <author>
      <firstName>Gamal A.</firstName>
      <lastName>El-Hiti</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ti-25Nb-25Zr alloy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Biomaterial alloys</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Total hip replacement</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Photocatalytic</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Biocompatibility</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Artificial bone</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Orthopedic implants</value>
    </subject>
    <collection role="institutes" number="3406">FG Metallkunde und Werkstofftechnik</collection>
  </doc>
  <doc>
    <id>31114</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>2152</pageFirst>
    <pageLast>2165</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>25</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2023-06-26</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Structural, mechanical and tribological performance of a nano structured biomaterial Co–Cr–Mo alloy synthesized via mechanical alloying</title>
    <abstract language="eng">The influence of milling time on the tribological behavior of a Co–Cr–Mo alloy designed for biomedical applications, synthesized via mechanical alloying is investigated. Elemental Co, Cr and Mo powders are milled using different milling times (2, 6, 12 and 18 h) in a high-energy ball mill. The resulting powders were subjected to cold uniaxial and hot isostatic pressing respectively, followed by sintering to obtain cylindrical samples, which were evaluated for their structural, mechanical and the wear behavior. Results showed that the grain and crystallite sizes of the powders decreased with increasing milling time, reaching low values of &lt;10 μm and 32 μm respectively, at higher milling times. Furthermore, the wear rates and the coefficients of friction were lower, at higher milling times due to high densities (96%), and higher elasto-plastic resistance, as presented by the H/E and H3/E2 values of 0.026 and 0.0021 GPa, respectively. Increased milling time enables the refinement of grains and reduction in porosity in the Co–Cr–Mo alloy, which in turn increases the alloy's elasto-plastic resistance and enhances its wear resistance.</abstract>
    <parentTitle language="eng">Journal of Materials Research and Technology</parentTitle>
    <identifier type="issn">2214-0697</identifier>
    <identifier type="url">https://www.sciencedirect.com/science/article/pii/S2238785423012796</identifier>
    <identifier type="doi">10.1016/j.jmrt.2023.06.031</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Publikationsweg">Open Access</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">3 Globaler Wandel und Transformationsprozesse / Global Change and Transformation Processes</enrichment>
    <author>
      <firstName>Mamoun</firstName>
      <lastName>Fellah</lastName>
    </author>
    <submitter>
      <firstName>Aleksei</firstName>
      <lastName>Obrosov</lastName>
    </submitter>
    <author>
      <firstName>Naouel</firstName>
      <lastName>Hezil</lastName>
    </author>
    <author>
      <firstName>Dikra</firstName>
      <lastName>Bouras</lastName>
    </author>
    <author>
      <firstName>Aleksei</firstName>
      <lastName>Obrosov</lastName>
    </author>
    <author>
      <firstName>Mohammed Abdul</firstName>
      <lastName>Samad</lastName>
    </author>
    <author>
      <firstName>Alex</firstName>
      <lastName>Montagne</lastName>
    </author>
    <author>
      <firstName>Assmaa</firstName>
      <lastName>Abd-Elmonem</lastName>
    </author>
    <author>
      <firstName>Sayed M El</firstName>
      <lastName>Din</lastName>
    </author>
    <author>
      <firstName>Sabine</firstName>
      <lastName>Weiß</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Tribology</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Wear resistance</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Friction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Powder metallurgy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Co–Cr–Mo alloy</value>
    </subject>
    <collection role="institutes" number="3406">FG Metallkunde und Werkstofftechnik</collection>
  </doc>
  <doc>
    <id>32163</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue>10</issue>
    <volume>16</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2023-12-11</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Investigating the effect of milling time on structural, mechanical and tribological properties of a nanostructured hiped alpha alumina for biomaterial applications</title>
    <abstract language="eng">In this work was prepared α-Al2O3 alloys from laboratory aluminum oxide powder that was milled for different periods of time and sintered at a temperature of 1450 °C. The difference between the prepared samples was studied using several experimental measurement techniques, including X-ray diffraction, scanning electron microscopy and measurement of physical and mechanical properties. Moreover, the effect of milling time on the formation and sintering of alpha-alumina, by milling the mixture at different times using high energy crushing technique was studied. An influence of milling time on density, open spaces and microstructure of the samples was analyzed. The obtained results showed that longer milling duration led to alloys with higher hardness (H) and modulus of elasticity (E). This improvement is due to lower porosity and corresponding higher density at high temperatures. A noticeable decrease in the size of the particles with the increase of the milling time led to an increase in the lattice parameter accompanied by a decrease in defects and ionic voids. The percentage of pores reached 0.04 % within 24 h of grinding after it was approximately 0.20 %, while the density reached 96 % after the same highest grinding time. Tests showed that the value of friction coefficient decreases, while it increases with the increase in the applied pressure force and this was confirmed by SEM images of the samples. the main factor to reduce friction is the increase in grinding time, regardless of the value of the applied load. The results showed that the Al2O3 alloy applied to it with a load of 2 N and milled for 24 h had a minimum value of 1.94 µm3 wear volumes and a wear rate of 1.33 (µm3∙N−1∙µm−1). The sample milled for 24 h showed the best result, characterized by the lowest wear size, specific wear rate and the highest hardness with extraordinary density of 96 %, which is important in the field of biomaterials applications.</abstract>
    <parentTitle language="eng">Arabian Journal of Chemistry</parentTitle>
    <identifier type="issn">1878-5379</identifier>
    <identifier type="url">https://www.sciencedirect.com/science/article/pii/S1878535223005749</identifier>
    <identifier type="doi">10.1016/j.arabjc.2023.105112</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">105112</enrichment>
    <enrichment key="Publikationsweg">Open Access</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">3 Globaler Wandel und Transformationsprozesse / Global Change and Transformation Processes</enrichment>
    <author>
      <firstName>Mamoun</firstName>
      <lastName>Fellah</lastName>
    </author>
    <submitter>
      <firstName>Aleksei</firstName>
      <lastName>Obrosov</lastName>
    </submitter>
    <author>
      <firstName>Naouel</firstName>
      <lastName>Hezil</lastName>
    </author>
    <author>
      <firstName>Dikra</firstName>
      <lastName>Bouras</lastName>
    </author>
    <author>
      <firstName>Alex</firstName>
      <lastName>Montagne</lastName>
    </author>
    <author>
      <firstName>Aleksei</firstName>
      <lastName>Obrosov</lastName>
    </author>
    <author>
      <firstName>Wasim</firstName>
      <lastName>Jamshed</lastName>
    </author>
    <author>
      <firstName>Rabha W.</firstName>
      <lastName>Ibrahim</lastName>
    </author>
    <author>
      <firstName>Amjad</firstName>
      <lastName>Iqbal</lastName>
    </author>
    <author>
      <firstName>Sayed M.</firstName>
      <lastName>El Din</lastName>
    </author>
    <author>
      <firstName>Hamiden Abd El-Wahed</firstName>
      <lastName>Khalifa</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>α-Al2O3</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Milling time</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanomaterials</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Particle size</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Hardness</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Biomaterials</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Biomedical applications</value>
    </subject>
    <collection role="institutes" number="3406">FG Metallkunde und Werkstofftechnik</collection>
  </doc>
  <doc>
    <id>32240</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue>1</issue>
    <volume>35</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2023-12-22</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Effect of milling time on structural, physical and tribological behavior of a newly developed Ti-Nb-Zr alloy for biomedical applications</title>
    <abstract language="eng">Titanium (Ti)-based alloys with only a β-phase have attracted academic and industrial interest for orthopedic application, due to their close properties to those of tissues. The current study aims to investigate the effect of milling time (2 h, 6 h, 12 h and 18 h) on the nanostructured ternary alloy Ti-25Nb-25Zr prepared by high energy milling, on its structural, physical and tribological behaviors. The alloys’ characteristics such as relative density/porosity, surface roughness, were evaluated using XRD, SEM, surface profilometry, and microdurometer, respectively. The tribological characterization was done using an oscillating tribometer under wet conditions, simulating the human body environment. Results showed that the crystallite and mean pore size reduced with increasing milling time, with the smallest values of 26 nm and 40 µm, respectively after 18 h. Structural characterization shows that the amount of the β-Ti phase increased with increasing milling time, resulting in spherical morphology and texturing of the synthesized alloys. The milled alloys' structural evolution and morphological changes were sensitive to their milling times. Also, the relative density, Young’s modulus and hardness, increased due to grain size decreased with increasing milling time. Tribological results showed that the effect of milling has a significant effect on both nanomaterial formation and friction-wear behavior of the alloys. The results showed that, friction coefficient and wear rate significantly decreased due to the increased formation of protective films such as TiO2, Nb2O5 and ZrO2 phases. The wear mechanism of the Ti-25Zr-25Nb system was dominated by abrasion wear accompanied by adhesion wear.</abstract>
    <parentTitle language="eng">Advanced Powder Technology</parentTitle>
    <identifier type="issn">1568-5527</identifier>
    <identifier type="url">https://www.sciencedirect.com/science/article/pii/S0921883123003710</identifier>
    <identifier type="doi">https://doi.org/10.1016/j.apt.2023.104306</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">104306</enrichment>
    <enrichment key="Publikationsweg">Open Access</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">3 Globaler Wandel und Transformationsprozesse / Global Change and Transformation Processes</enrichment>
    <author>
      <firstName>Fouzia</firstName>
      <lastName>Hamadi</lastName>
    </author>
    <submitter>
      <firstName>Aleksei</firstName>
      <lastName>Obrosov</lastName>
    </submitter>
    <author>
      <firstName>Mamoun</firstName>
      <lastName>Fellah</lastName>
    </author>
    <author>
      <firstName>Naouel</firstName>
      <lastName>Hezil</lastName>
    </author>
    <author>
      <firstName>Dikra</firstName>
      <lastName>Bouras</lastName>
    </author>
    <author>
      <firstName>Salah Eddine</firstName>
      <lastName>Laouini</lastName>
    </author>
    <author>
      <firstName>Alex</firstName>
      <lastName>Montagne</lastName>
    </author>
    <author>
      <firstName>Hamiden Abd El-Wahed</firstName>
      <lastName>Khalifa</lastName>
    </author>
    <author>
      <firstName>Aleksei</firstName>
      <lastName>Obrosov</lastName>
    </author>
    <author>
      <firstName>Gamal A.</firstName>
      <lastName>El-Hiti</lastName>
    </author>
    <author>
      <firstName>Krishna Kumar</firstName>
      <lastName>Yadav</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ti-25Nb-25Zr alloy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Biomaterials alloys</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Total hip prosthesis</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Milling time</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Tribology</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Wear</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanomaterial</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanocomposites</value>
    </subject>
    <collection role="institutes" number="3406">FG Metallkunde und Werkstofftechnik</collection>
  </doc>
</export-example>
