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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},
}