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@ARTICLE{Jasper:256355,
      author       = {Jasper, Bruno and Coenen, Jan W. and Riesch, Johann and
                      Höschen, Till and Bram, Martin and Linsmeier, Christian},
      title        = {{P}owder {M}etallurgical {T}ungsten {F}iber-{R}einforced
                      {T}ungsten},
      journal      = {Materials science forum},
      volume       = {825-826},
      issn         = {1662-9752},
      address      = {Uetikon},
      publisher    = {Trans Tech Publ.},
      reportid     = {FZJ-2015-06314},
      pages        = {125 - 133},
      year         = {2015},
      abstract     = {The composite material tungsten fiber-reinforced tungsten
                      (Wf/W) addresses the brittleness of tungsten by extrinsic
                      toughening through introduction of energy dissipation
                      mechanisms. These mechanisms allow the release of stress
                      peaks and thus improve the materials resistance against
                      crack growth. Wf/W samples produced via chemical vapor
                      infiltration (CVI) indeed show higher toughness in
                      mechanical tests than pure tungsten. By utilizing powder
                      metallurgy (PM) one could benefit from available
                      industrialized approaches for composite production and
                      alloying routes. In this contribution the PM method of hot
                      isostatic pressing (HIP) is used to produce Wf/W samples. A
                      variety of measurements were conducted to verify the
                      operation of the expected toughening mechanisms in HIP Wf/W
                      composites. The interface debonding behavior was
                      investigated in push-out tests. In addition, the mechanical
                      properties of the matrix were investigated, in order to
                      deepen the understanding of the complex interaction between
                      the sample preparation and the resulting mechanical
                      properties of the composite material. First HIP Wf/W
                      single-fiber samples feature a compact matrix with densities
                      of more than $99\%$ of the theoretical density of tungsten.
                      Scanning electron microscopy (SEM) analysis further
                      demonstrates an intact interface with indentations of powder
                      particles at the interface-matrix boundary. First push-out
                      tests indicate that the interface was damaged by HIPing.},
      cin          = {IEK-1 / IEK-4},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / I:(DE-Juel1)IEK-4-20101013},
      pnm          = {174 - Plasma-Wall-Interaction (POF3-174) / HITEC -
                      Helmholtz Interdisciplinary Doctoral Training in Energy and
                      Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-174 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.4028/www.scientific.net/MSF.825-826.125},
      url          = {https://juser.fz-juelich.de/record/256355},
}