High Heat Flux Testing of Graded W-Steel Joining Concepts for the First Wall
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00573323" target="_blank" >RIV/61389021:_____/23:00573323 - isvavai.cz</a>
Result on the web
<a href="https://www.mdpi.com/1996-1073/16/9/3664" target="_blank" >https://www.mdpi.com/1996-1073/16/9/3664</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/en16093664" target="_blank" >10.3390/en16093664</a>
Alternative languages
Result language
angličtina
Original language name
High Heat Flux Testing of Graded W-Steel Joining Concepts for the First Wall
Original language description
The realization of the first wall (FW), which is composed of a protective tungsten (W) armor covering the structural steel material, is a critical challenge in the development of future fusion reactors. Due to the different coefficients of thermal expansion (CTE) of W and steel, the direct joining of them results in cyclic thermal stress at their bonding seam during the operation of the fusion reactor. To address this issue, this study benchmarks two joining concepts. The first concept uses an atmospheric plasma sprayed graded interlayer composed of W/steel composites with a varying content of W and steel to gradually change the CTE. The second concept uses a spark plasma sintered graded interlayer. Furthermore, in order to benchmark these concepts, a directly bonded W-steel reference joint as well as a W-steel joint featuring a vanadium interlayer were also tested. These joints were tested under steady-state high heat flux cyclic loading, starting from a heat flux of 1 MW/m2 up to 4.5 MW/m2, with stepwise increments of 0.5 MW/m2. At each heat flux level, 200 thermal cycles were performed. The joints featuring a sintered graded interlayer survived only until 1.5 MW/m2 of loading, while the joint featuring plasma sprayed graded interlayer and V interlayer survived until 3 MW/m2.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Energies
ISSN
1996-1073
e-ISSN
1996-1073
Volume of the periodical
16
Issue of the periodical within the volume
9
Country of publishing house
CH - SWITZERLAND
Number of pages
12
Pages from-to
3664
UT code for WoS article
000986920400001
EID of the result in the Scopus database
2-s2.0-85159379332