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@ARTICLE{GonzalezJulian:841901,
author = {Gonzalez-Julian, Jesus and Onrubia, Sara and Bram, Martin
and Broeckmann, Christoph and Vassen, Robert and Guillon,
Olivier},
title = {{H}igh-temperature oxidation and compressive strength of
{C}r2{A}l{C} {MAX} phase foams with controlled porosity},
journal = {Journal of the American Ceramic Society},
volume = {101},
number = {2},
issn = {0002-7820},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2018-00198},
pages = {542 - 552},
year = {2018},
abstract = {Cr2AlC foams have been processed for the first time
containing low (35 $vol\%),$ intermediate (53 $vol\%),$ and
high (75 $vol\%)$ content of porosity and three ranges of
pore size, 90-180 μm, 180-250 μm, and 250-400 μm.
Sacrificial template technique was used as the processing
method, utilizing NH4HCO3 as a temporary pore former. Cr2AlC
foams exhibited negligible oxidation up to 800°C and
excellent response up to 1300°C due to the in-situ
formation of an outer thin continuous protective layer of
α-Al2O3. The in-situ α-Al2O3 protective layer covered
seamlessly all the external surface of the pores, even when
they present sharp angles and tight corners, reducing
significantly the further oxidation of the foams. The
compressive strength of the foams was 73 and 13 MPa for 53
$vol\%$ and 75 $vol\%$ porosity, respectively, which
increased up to 128 and 24 MPa after their oxidation at
1200°C for 1 hour. The increase in the compressive strength
after the oxidation was caused by the switch from inter- to
transgranular fracture mode. According to the excellent
high-temperature response, heat exchangers and catalyst
supports are the potential application of these foams.},
cin = {IEK-1 / JARA-ENERGY},
ddc = {660},
cid = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
pnm = {111 - Efficient and Flexible Power Plants (POF3-111) / 113
- Methods and Concepts for Material Development (POF3-113)},
pid = {G:(DE-HGF)POF3-111 / G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000416933700008},
doi = {10.1111/jace.15224},
url = {https://juser.fz-juelich.de/record/841901},
}