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| Hauptseite > Publikationsdatenbank > Temperature Dependent Surface Modification of Molybdenum Due to Low Energy He+ Ion Irradiation > print |
| Hauptseite > Publikationsdatenbank > Temperature Dependent Surface Modification of Molybdenum Due to Low Energy He+ Ion Irradiation > print |
| 001 | 837696 | ||
| 005 | 20240711092227.0 | ||
| 024 | 7 | _ | |a 10.1016/j.jnucmat.2015.04.022 |2 doi |
| 024 | 7 | _ | |a 0022-3115 |2 ISSN |
| 024 | 7 | _ | |a 1873-4820 |2 ISSN |
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| 082 | _ | _ | |a 530 |
| 100 | 1 | _ | |a Tripathi, J. K. |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Temperature Dependent Surface Modification of Molybdenum Due to Low Energy He+ Ion Irradiation |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2015 |b Elsevier Science |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a In this paper, we report on the temperature dependent surface modifications in molybdenum (Mo) samples due to 100 eV He+ ion irradiation in extreme conditions as a potential candidate to plasma-facing components in fusion devices alternative to tungsten. The Mo samples were irradiated at normal incidence, using an ion fluence of 2.6 × 1024 ions m−2 (with a flux of 7.2 × 1020 ions m−2 s−1). Surface modifications have been studied using high-resolution field emission scanning electron-(SEM) and atomic force (AFM) microscopy. At 773 K target temperature homogeneous evolution of molybdenum nanograins on the entire Mo surface were observed. However, at 823 K target temperature appearance of nano-pores and pin-holes nearby the grain boundaries, and Mo fuzz in patches were observed. The fuzz density increases significantly with target temperatures and continued until 973 K. However, at target temperatures beyond 973 K, counterintuitively, a sequential reduction in the fuzz density has been seen till 1073 K temperatures. At 1173 K and above temperatures, only molybdenum nano structures were observed. Our temperature dependent studies confirm a clear temperature widow, 823–1073 K, for Mo fuzz formation. Ex-situ high resolution X-ray photoelectron spectroscopy studies on Mo fuzzy samples show the evidence of MoO3 3d doublets. This elucidates that almost all the Mo fuzz were oxidized during open air exposure and are thick enough as well. Likewise the microscopy studies, the optical reflectivity measurements also show a sequential reduction in the reflectivity values (i.e., enhancement in the fuzz density) up to 973 K and after then a sequential enhancement in the reflectivity values (i.e., reduction in the fuzz density) with target temperatures. This is in well agreement with microscopy studies where we observed clear temperature window for Mo fuzz growth. |
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| 700 | 1 | _ | |a Novakowski, T. J. |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Joseph, G. |0 P:(DE-HGF)0 |b 2 |e Corresponding author |
| 700 | 1 | _ | |a Linke, J. |0 P:(DE-Juel1)129747 |b 3 |
| 700 | 1 | _ | |a Hassanein, A. |0 P:(DE-HGF)0 |b 4 |
| 773 | _ | _ | |a 10.1016/j.jnucmat.2015.04.022 |g Vol. 464, p. 97 - 106 |0 PERI:(DE-600)2001279-2 |p 97 - 106 |t Journal of nuclear materials |v 464 |y 2015 |x 0022-3115 |
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