scholarly journals Small-angle neutron scattering from CuCrZr coupons and components

2021 ◽  
Vol 54 (5) ◽  
Author(s):  
F. Schoofs ◽  
S. King ◽  
A. J. Cackett ◽  
M. Leyland ◽  
C. Hardie
Keyword(s):  
Heat Flux ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Fusion Reactor ◽  
Surface Preparation ◽  
High Heat ◽  
Small Scale ◽  
High Heat Flux ◽  
Manufacturing Method

Small-angle neutron scattering (SANS) is performed to analyse the microstructural state of a reference CuCrZr material with carefully controlled heat treatments, small-scale manufacturing mock-ups of assemblies and high-heat-flux-exposed mock-ups for fusion reactor components. The information derived from the SANS data corresponds well to existing literature data based on microscopic-scale techniques, but is obtained at millimetre scale with minimal surface preparation. The manufacturing method and high-heat-flux testing conditions are confirmed to have little impact on the microstructural properties, demonstrating the validity of these treatments for scaled-up reactor components.

Plasma-Sprayed Beryllium on Macro-Roughened Substrates for Fusion Reactor High Heat Flux Applications

2007 ◽  
Vol 16 (1) ◽  
pp. 96-103 ◽  
Author(s):  
Kendall J. Hollis ◽  
Brian D. Bartram ◽  
Manfred Roedig ◽  
Dennis Youchison ◽  
Richard Nygren
Keyword(s):  
Heat Flux ◽  
Fusion Reactor ◽  
High Heat ◽  
High Heat Flux ◽  
Plasma Sprayed

Development of Functionally Graded Coating Based Plasma Facing Materials for Fusion Reactor

2010 ◽  
Vol 63 ◽  
pp. 383-391
Author(s):  
Chang Chun Ge ◽  
Shuang Quan Guo ◽  
Yun Biao Feng ◽  
Zhang Jian Zhou ◽  
Juan Du ◽  
...  
Keyword(s):  
Heat Flux ◽  
Plasma Spray ◽  
Vapor Deposition ◽  
Fusion Reactor ◽  
High Heat ◽  
Functionally Graded ◽  
Atmospheric Plasma ◽  
High Heat Flux ◽  
Tungsten Coating ◽  
Plasma Facing Materials

Different coating technologies, such as plasma spray (PS), physical vapor deposition (PVD) and chemical vapor deposition (CVD), which can fabricate the PFM and join it to heat sink materials simultaneously, were applied for the fabrication of plasma facing materials (PFM) in fusion reactor. In the Institute of Nuclear Materials, University of Science and Technology Beijing (USTB), the concept of functionally graded materials (FGM) was adopted to fabricate coatings for effectively alleviating the thermal stress generated between coatings and the substrate materials under high heat flux loading (5~20 MW/m2). In the last several years, functionally graded coatings, including B4C/Cu, W/Cu and Mo/Cu systems were successfully fabricated by atmospheric plasma spray (APS). Characterization of coatings was performed in order to assess microstructure, mechanical properties and high heat flux properties of the FGM coatings. Furthermore, a high thick tungsten coating with 4 mm on copper – chromium - zirconium (Cu, Cr, Zr) alloy substrates was fabricated by APS. The porosity of the coating is less than 2% while mean tensile strength of the coating is about 7 MPa. However, the content of oxygen in the coating is about 6 wt% by energy dispersive spectrum (EDS) analysis, thus further optimization is necessary.

Overview of the EU small scale mock-up tests for ITER high heat flux components

1998 ◽  
Vol 39-40 ◽  
pp. 211-218 ◽  
Author(s):  
G Vieider ◽  
V Barabash ◽  
A Cardella ◽  
P Chappuis ◽  
R Duwe ◽  
...  
Keyword(s):  
Heat Flux ◽  
High Heat ◽  
Small Scale ◽  
High Heat Flux ◽  
The Eu

Radiation damage studies in fusion reactor steels by means of small-angle neutron scattering (SANS)

2018 ◽  
Vol 551 ◽  
pp. 407-412 ◽  
Author(s):  
R. Coppola ◽  
M. Klimenkov ◽  
R. Lindau ◽  
A. Möslang ◽  
M. Rieth ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Radiation Damage ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Fusion Reactor ◽  
Reactor Steels

Experimental Characterization of Thin-Film Thermoelectric Based Active Cooling Modules

2013 ◽  
Author(s):  
S. Ravi Annapragada ◽  
Matthew R. Pearson ◽  
William A. Rioux ◽  
Charles E. Lents
Keyword(s):  
Thin Film ◽  
Heat Flux ◽  
High Heat ◽  
Coefficient Of Performance ◽  
Small Scale ◽  
High Heat Flux ◽  
Thermoelectric Cooling ◽  
Thermoelectric Coolers ◽  
Active Cooling ◽  
Experimental Apparatus

Improvements in electronic devices have led to increased power densities and need for small scale miniature cooling solutions. To address this issue, Defense Advanced Research Projects Agency (DARPA), Microsystems Technology Office (MTO) created the Active Cooling Modules (ACM) effort to develop technology solutions able to provide small scale (4 cm2) active high heat flux cooling of a 100W device (25 W/cm2) at a 15 °C temperature lift with Coefficient Of Performance (COP) comparable to state of the art thermoelectric coolers. Thin-film thermoelectric cooling devices are well suited to provide high heat flux active cooling. In the present work, an experimental apparatus is developed to characterize the performance of a subscale thin-film thermoelectric cooling modules 1/144th, 1/36th and 1/9th the size of a full scale 4 cm2 device. An in-situ calibration methodology is proposed to characterize the performance of these thermoelectric microcoolers. In this early development work, vacuum conditions are maintained to minimize thermal losses between the thermoelectric module sink and source sides. The small size of the subscale devices and vacuum conditions introduce additional uncertainties into the system and could lead to errors in COP measurement (>0.5). The additional sources of errors as the device dimensions shrink are identified and minimized leading to energy balance in the system.

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