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@ARTICLE{Mao:902102,
      author       = {Mao, Yiran and Coenen, Jan and Sistla, Sree and Liu, Chao
                      and Terra, Alexis and Tan, Xiaoyue and Riesch, Johann and
                      Hoeschen, Till and Wu, Yucheng and Broeckmann, Christoph and
                      Linsmeier, Christian},
      title        = {{D}esign of tungsten fiber-reinforced tungsten composites
                      with porous matrix},
      journal      = {Materials science and engineering / A},
      volume       = {817},
      issn         = {0921-5093},
      address      = {Amsterdam},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-04033},
      pages        = {141361 -},
      year         = {2021},
      abstract     = {To overcome the brittleness of tungsten, tungsten
                      fiber-reinforced tungsten composites (Wf/W) have been
                      developed using an extrinsic toughening mechanism. In this
                      work, a novel type of Wf/W with porous matrix produced by
                      field assisted sintering technology (FAST) is studied. The
                      material is optimized regarding mechanical behavior,
                      standing on the adjusting of matrix porosity and fiber mass
                      fraction. Two series of samples with different matrix
                      density and fiber mass fraction are prepared. Based on the
                      mechanical testing, porous matrix Wf/W can represent a
                      promising pseudo ductile behavior. Relatively lower matrix
                      density is helpful to avoid a sudden load-drop during crack
                      opening. The different fracture behavior is attributed to
                      the different fiber/matrix interface bonding condition. By
                      increasing fiber mass fraction from $20\%$ to $50\%,$ porous
                      matrix Wf/W can facilitate improved mechanical properties
                      regarding fracture toughness and strength. However, by
                      further increasing the fiber mass fraction from $50\%$ to
                      $60\%,$ a deterioration of mechanical properties is
                      observed. The high porosity of porous matrix Wf/W causes a
                      degradation of the thermal conductivity compared to
                      conventional bulk tungsten. No significant change regarding
                      thermal expansion coefficient is observed when decreasing
                      the matrix density.},
      cin          = {IEK-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {1232 - Power-based Fuels and Chemicals (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1232},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000659100000003},
      doi          = {10.1016/j.msea.2021.141361},
      url          = {https://juser.fz-juelich.de/record/902102},
}