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Rogozhkin SV, Klauz AV, Ke Y, Almásy L, Nikitin AA, Khomich AA, Bogachev AA, Gorshkova YE, Bokuchava GD, Kopitsa GP, Sun L. Study of Precipitates in Oxide Dispersion-Strengthened Steels by SANS, TEM, and APT. Nanomaterials (Basel) 2024; 14:194. [PMID: 38251158 DOI: 10.3390/nano14020194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 01/23/2024]
Abstract
In this work, the nanostructure of oxide dispersion-strengthened steels was studied by small-angle neutron scattering (SANS), transmission electron microscopy (TEM), and atom probe tomography (APT). The steels under study have different alloying systems differing in their contents of Cr, V, Ti, Al, and Zr. The methods of local analysis of TEM and APT revealed a significant number of nanosized oxide particles and clusters. Their sizes, number densities, and compositions were determined. A calculation of hardness from SANS data collected without an external magnetic field, or under a 1.1 T field, showed good agreement with the microhardness of the materials. The importance of taking into account two types of inclusions (oxides and clusters) and both nuclear and magnetic scattering was shown by the analysis of the scattering data.
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Affiliation(s)
- Sergey V Rogozhkin
- Institute of Nuclear Physics and Engineering, National Research Nuclear University "MEPhI", 115409 Moscow, Russia
- National Research Center "Kurchatov Institute", 123182 Moscow, Russia
| | - Artem V Klauz
- Institute of Nuclear Physics and Engineering, National Research Nuclear University "MEPhI", 115409 Moscow, Russia
- National Research Center "Kurchatov Institute", 123182 Moscow, Russia
| | - Yubin Ke
- Spallation Neutron Source Science Center, Dongguan 523803, China
| | - László Almásy
- Institute for Energy Security and Environmental Safety, HUN-REN Centre for Energy Research, 1121 Budapest, Hungary
| | - Alexander A Nikitin
- Institute of Nuclear Physics and Engineering, National Research Nuclear University "MEPhI", 115409 Moscow, Russia
- National Research Center "Kurchatov Institute", 123182 Moscow, Russia
| | - Artem A Khomich
- Institute of Nuclear Physics and Engineering, National Research Nuclear University "MEPhI", 115409 Moscow, Russia
- National Research Center "Kurchatov Institute", 123182 Moscow, Russia
| | - Aleksei A Bogachev
- Institute of Nuclear Physics and Engineering, National Research Nuclear University "MEPhI", 115409 Moscow, Russia
- National Research Center "Kurchatov Institute", 123182 Moscow, Russia
| | - Yulia E Gorshkova
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
- Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
| | | | - Gennadiy P Kopitsa
- Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of NRC "Kurchatov Institute", 188300 Gatchina, Russia
| | - Liying Sun
- Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China
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Bogachev AA, Kozlov KL, Oleksiuk IB. [Coronary revascularization versus optimal medical therapy in elderly patients with stable multivessel disease]. Adv Gerontol 2011; 24:650-657. [PMID: 22550874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Multivessel coronary disease is more common in elderly. What to choose as a primary strategy in elderly patients with stable angina: revascularization (percutaneous coronary intervention or aortocoronary bypass surgery) with intensive pharmacologic therapy and lifestyle intervention (optimal medical therapy) or optimal medical therapy alone? Clinical trials comparing these two approaches have shown that elderly benefit more from revascularization than younger patients. There is no doubt that multivessel disease requires a heart-team to select the optimal management. Age by itself is not a criterion to select the treatment strategies. One need to consider many other factors: medical findings, angiography, the patient's desire, social, cultural factors and other parameters. Patients should be given full and objective information.
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