High Heat Flux Testing of B4C/Cu and SiC/Cu Functionally Graded Materials Simulated by Laser and Electron Beam

2002 ◽  
Vol 4 (1) ◽  
pp. 1171-1176 ◽  
Author(s):  
Liu Xiang ◽  
Chen Ji-ming ◽  
Zhang Fu ◽  
Xu Zeng-yu ◽  
Ge Chang-chun ◽  
...  
Keyword(s):  
Heat Flux ◽  
Electron Beam ◽  
Functionally Graded Materials ◽  
High Heat ◽  
Functionally Graded ◽  
High Heat Flux ◽  
Graded Materials

Thermo-Elasto-Plastic Analysis of Thick-Walled Spherical Pressure Vessels Made of Functionally Graded Materials

2016 ◽  
Vol 08 (04) ◽  
pp. 1650054 ◽  
Author(s):  
Zeinab Mazarei ◽  
Mohammad Zamani Nejad ◽  
Amin Hadi
Keyword(s):  
Heat Flux ◽  
Functionally Graded Materials ◽  
Poisson’S Ratio ◽  
Pressure Vessels ◽  
Functionally Graded ◽  
Material Behavior ◽  
Poisson's Ratio ◽  
Uniform Heat Flux ◽  
Plastic Behavior ◽  
Graded Materials

An exact closed-form analytical solution is presented to solve the thermo-elasto-plastic problem of thick-walled spherical vessels made of functionally graded materials (FGMs). Assuming that the inner surface is exposed to a uniform heat flux, and that the outer surface is exposed to an airstream. The heat conduction equation for the one-dimensional problem in spherical coordinates is used to obtain temperature distribution in the sphere. Material properties are graded in the thickness direction according to a power law distribution, whereas the Poisson’s ratio is kept constant. The Poisson’s ratio due to slight variations in engineering materials is assumed constant. The plastic model is based on von Mises yield criterion and its associated flow rules under the assumption of perfectly plastic material behavior. For various values of inhomogeneity constant, the so-obtained solution is then used to study the distribution of limit heat flux, displacement and stresses versus the radial direction. Moreover, the effect of increasing the heat flux and pressure on the propagation of the plastic zone are investigated. Furthermore, the effect of change in Poisson’s ratio on the value of the critical material parameter is demonstrated. The present study is also validated by comparing the numerical results for thick elasto-plastic spherical shells available in the literature. To the best of the authors’ knowledge, in previous studies, exact thermo-elasto-plastic behavior of FGM thick-walled sphrical pressure vessels has not investigated.

Comparison of electron beam test facilities for testing of high heat flux components

2000 ◽  
Vol 51-52 ◽  
pp. 715-722 ◽  
Author(s):  
M Rödig ◽  
M Akiba ◽  
P Chappuis ◽  
R Duwe ◽  
M Febvre ◽  
...  
Keyword(s):  
Heat Flux ◽  
Electron Beam ◽  
High Heat ◽  
High Heat Flux ◽  
Beam Test

High heat flux test by high current and low energy electron beam

1989 ◽  
Vol 9 ◽  
pp. 259-264 ◽  
Author(s):  
Y. Yamauchi ◽  
M. Fujitsuka ◽  
H. Shinno ◽  
T. Tanabe ◽  
T. Shikama ◽  
...  
Keyword(s):  
Heat Flux ◽  
Electron Beam ◽  
High Heat ◽  
Low Energy ◽  
Energy Electron ◽  
High Heat Flux ◽  
High Current ◽  
Low Energy Electron

High-heat-flux experiment on plasma-facing materials by electron beam irradiation

1994 ◽  
Vol 212-215 ◽  
pp. 1323-1328 ◽  
Author(s):  
K. Tokunaga ◽  
K. Matsumoto ◽  
Y. Miyamoto ◽  
T. Muroga ◽  
N. Yoshida
Keyword(s):  
Heat Flux ◽  
Electron Beam ◽  
Electron Beam Irradiation ◽  
High Heat ◽  
High Heat Flux ◽  
Beam Irradiation ◽  
Plasma Facing Materials

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.

The Recent Progress of FGM on Nuclear Materials - Design and Fabrication of W/Cu Functionally Graded Material High Heat Flux Components for Fusion Reactor

2009 ◽  
Vol 631-632 ◽  
pp. 353-358 ◽  
Author(s):  
Zhang Jian Zhou ◽  
Yong Jin Yum ◽  
Chang Chun Ge
Keyword(s):  
Heat Flux ◽  
Functionally Graded Material ◽  
High Heat ◽  
Functionally Graded ◽  
High Heat Flux ◽  
Element Analysis ◽  
Thermally Induced ◽  
Operation Conditions ◽  
Graded Material ◽  
Graded Structures

Two kinds of W/Cu functionally graded material based high heat flux components, including monoblock concept and flat tile concept, are designed and fabricated. Thermally induced stresses and strains under operation conditions in these components are analyzed using finite element analysis. The effect on stress and strain of using different graded structures to join Cu to W is examined and compared. There has no obvious difference on operation thermal stress mitigating between monoblock design and flat tile design. The component with monoblock concept was fabricated by a one step fast resistance sintering, and the component with flat tile concept was fabricated by infiltration-welding method successfully.

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