Sputtering and reflection of self-bombardment of tungsten material

2015 ◽  
Vol 349 ◽  
pp. 45-49 ◽  
Author(s):  
Guo-jian Niu ◽  
Xiao-chun Li ◽  
Qian Xu ◽  
Zhong-shi Yang ◽  
Guang-nan Luo
Keyword(s):  
Tungsten Material

Corrigendum “2D metallic tungsten material”. [Appl. Surf. Sci. 530 (2020) 147231]

2021 ◽  
Vol 545 ◽  
pp. 149049
Author(s):  
Bo Zhang ◽  
Veronika Cicmancova ◽  
Jhonatan Rodriguez Pereira ◽  
Jaroslav Kupcik ◽  
Petr Kutalek ◽  
...  
Keyword(s):  
Tungsten Material

Highly depth-resolved characterization of fusion-related tungsten material based on picosecond laser-induced breakdown spectroscopy

2020 ◽  
Vol 35 (12) ◽  
pp. 2867-2879
Author(s):  
Dongye Zhao ◽  
Ding Wu ◽  
Jannis Oelmann ◽  
Sebastijan Brezinsek ◽  
Qingmei Xiao ◽  
...  
Keyword(s):  
Nuclear Fusion ◽  
Picosecond Laser ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Potential Applications ◽  
Tungsten Material

The objective of the present study has been to evaluate the potential applications of picosecond laser-induced breakdown spectroscopy (ps-LIBS) in nuclear fusion devices.

Quality and Performance of Commercial Nanocomposite Scandate Tungsten Material

2019 ◽  
Author(s):  
Michelle Gonzalez ◽  
Neville C. Luhmann ◽  
Diana Gamzina ◽  
Colin McElroy ◽  
Carl Schalansky
Keyword(s):  
And Performance ◽  
Tungsten Material

scholarly journals Heat load and deuterium plasma effects on SPS and WSP tungsten

Nukleonika ◽  
2015 ◽  
Vol 60 (2) ◽  
pp. 275-283 ◽  
Author(s):  
Monika Vilémová ◽  
Jiří Matějíček ◽  
Barbara Nevrlá ◽  
Maryna Chernyshova ◽  
Pawel Gasior ◽  
...  
Keyword(s):  
Nuclear Fusion ◽  
Edge Plasma ◽  
Deuterium Plasma ◽  
Thermally Induced ◽  
Fusion Device ◽  
Plasma Sintering ◽  
Water Stabilized Plasma ◽  
Spark Plasma ◽  
Tungsten Material ◽  
Induced Changes

Abstract Tungsten is a prime choice for armor material in future nuclear fusion devices. For the realization of fusion, it is necessary to address issues related to the plasma–armor interactions. In this work, several types of tungsten material were studied, i.e. tungsten prepared by spark plasma sintering (SPS) and by water stabilized plasma spraying (WSP) technique. An intended surface porosity was created in the samples to model hydrogen/helium bubbles. The samples were subjected to a laser heat loading and a radiation loading of deuterium plasma to simulate edge plasma conditions of a nuclear fusion device (power density of 108 W/cm2 and 107 W/cm2, respectively, in the pulse intervals up to 200 ns). Thermally induced changes in the morphology and the damage to the studied surfaces are described. Possible consequences for the fusion device operation are pointed out.

Strain Rate and Test Temperature Dependence on the Flow Properties of La2O3-Doped Tungsten

2008 ◽  
Vol 59 ◽  
pp. 319-325 ◽  
Author(s):  
I. Uytdenhouwen ◽  
R. Chaouadi ◽  
Jochen Linke ◽  
V. Massaut ◽  
G. Van Oost
Keyword(s):  
Strain Rate ◽  
Thermal Stresses ◽  
Large Strain ◽  
Oxide Dispersion Strengthened ◽  
Recrystallization Temperature ◽  
Flow Properties ◽  
Strain Rate Effects ◽  
Rate Effects ◽  
Subsurface Layers ◽  
Tungsten Material

Tungsten and tungsten alloys are promising metals as protective materials for the armour in future fusion reactors. These metals exhibit the highest melting point, superior thermo-mechanical properties, low erosion and moderate neutron activation properties. The main drawback is their intrinsic brittleness at room temperature and their low recrystallization temperature. During thermal shock events in ITER, tungsten materials will exhibit various crack formations and failure mechanisms. The extensive heat loads on the surface of the material will create high thermal stresses, huge temperature rises and therefore large strain rates in the subsurface layers. This paper deals with the flow properties combining both temperature and strain rate effects of a lanthanum oxide dispersion strengthened tungsten material and the influence of grain orientation on its ductility. Promising results were obtained using a yield strength model based on a thermally-activated slip process that rationalizes the data.

Laser-Induced Plasma Spectrometry With Chemical Seeding and Application to Flow Mixing Analysis in Methane–Air Flames

2014 ◽  
Vol 137 (1) ◽  
Author(s):  
Hirotoshi Taki ◽  
Hiroshi Asai ◽  
Kuniyuki Kitagawa ◽  
Hiroyuki Oyama ◽  
Ashwani K. Gupta
Keyword(s):  
Energy Efficiency ◽  
Target Material ◽  
Diagnostic Techniques ◽  
Plasma Spectroscopy ◽  
Spectral Emission ◽  
Plasma Spectrometry ◽  
Laser Induced Plasma ◽  
Flow Mixing ◽  
Tungsten Material ◽  
Air Diffusion

Spectroscopic measurements of flames are amongst the most important analytical diagnostic techniques that allow one to improve thermal and energy efficiency of industrial furnaces. A chemical seeding laser-induced plasma spectroscopy (CS-LIPS) was successfully developed and applied for mixing analysis of a methane–air diffusion flame. The results obtained showed that sensitivity of this system was much improved using silica rod as the target material in place of the tungsten material used in our previous studies. Profiling of Mg spectral emission and mixing in the flame was made more clearly with the introduction of magnesium aerosols as a tracer into the combustion air flow.

scholarly journals Microstructure and performance of rare earth element-strengthened plasma-facing tungsten material

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Laima Luo ◽  
Jing Shi ◽  
Jinshan Lin ◽  
Xiang Zan ◽  
Xiaoyong Zhu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
And Performance ◽  
Tungsten Material ◽  
Microstructure And Performance

Development of Minimally Invasive Microneedle Made of Tungsten – Sharpening Through Electrochemical Etching and Hole Processing for Drawing up Liquid Using Excimer Laser –

2013 ◽  
Vol 25 (4) ◽  
pp. 755-761 ◽  
Author(s):  
Takahiro Tanaka ◽  
◽  
Tomokazu Takahashi ◽  
Masato Suzuki ◽  
Seiji Aoyagi
Keyword(s):  
Minimally Invasive ◽  
Excimer Laser ◽  
Laser Processing ◽  
Electrochemical Etching ◽  
High Hardness ◽  
Resistance Force ◽  
Thin Wire ◽  
Medical Treatments ◽  
Tungsten Needle ◽  
Tungsten Material

A tungsten needle was fabricated by electrochemically etching a thin wire with a diameter of 100 µm, with the goal of using it in minimally invasive medical treatments. The sharpness and smoothness of the tip were effective for easy insertion because they provided a large stress concentration and small amount of friction, respectively. An experiment involving the insertion of the fabricated needle into artificial skinmade of silicone rubber was carried out. The resistance force during the insertion was greatly reduced because of the small size of the needle, which was comparable to a mosquito’s proboscis. Despite the ultra-thin shape, the microneedle neither buckled nor broke because of the high hardness of the tungsten material. A hole was fabricated in the tungsten needle using excimer laser processing and electrochemical etching. Water and blood sampling were successfully achieved using this needle.

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