Journal Article

FZJ-2015-05795

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Mechanical Characterization of Micro- and Nano-Porous Alumina

Zhang, J.FZJ* ; Malzbender, J. (Corresponding author)FZJ*

2015
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.ceramint.2015.05.007

Abstract: Advanced membrane concepts are based on thin layers that require a mechanically robust porous substrate material. Aiming at the use in pre-combustion systems, alumina substrate with different pore sizes were characterized with respect to their mechanical properties. Elastic moduli and fracture stresses were assessed using ring-on-ring bending tests. Furthermore, elastic moduli were compared to data obtained from indentation tests. Although porosity of the micro- and nano-porous materials were equal, elastic moduli and fracture stress values revealed significant differences, indicating that based on mechanical considerations the nano-porous material is far superior, although initial permeation test indicate difficulties in using it as porous substrate. Elastic moduli showed good agreement with a model based on the load-bearing contact area. Microstructural investigations supported that the higher strength of the nano-porous material is a result of a larger contact area between grains.

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Contributing Institute(s):

1. Werkstoffstruktur und -eigenschaften (IEK-2)

Research Program(s):

1. 111 - Efficient and Flexible Power Plants (POF3-111) (POF3-111)
2. HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406) (HITEC-20170406)

Appears in the scientific report 2015

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Database coverage:
; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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