Articole ştiinţifice: Recent submissions

Now showing items 1881-1900 of 4684

Nano- and Micromechanical Parameters of AISI 316L Steel

GRABCO, D.; SHIKIMAKA, O.; PYRTSAC, C.; BARBOS, Z.; POPA, M.; PRISACARU, A.; VILOTIC, D.; VILOTIC, M.; ALEKSANDROV, S. (Institutul de Fizică Aplicată al AŞM, 2020)

The nano- and micro-indentation mechanical parameters of the AISI 316L stainless steel, such as nanohardness (НNI), microhardness (HMI), the Young modulus (E), the indices of plasticity (H/E) and resistance (H3/E2), and ...
Нано- и микромеханические параметры стали AISI 316L

ГРАБКО, Д.; ШИКИМАКА, О.; ПЫРЦАК, К.; БАРБОС, З.; ПОПА, М.; ПРИСАКАРУ, А.; ВИЛОТИЧ, Д.; ВИЛОТИЧ, М.; АЛЕКСАНДРОВ, С. (Institutul de Fizică Aplicată al AŞM, 2020)

Изучены механические параметры нержавеющей стали AISI 316L при нано- и микроиндентировании, такие как нанотвердость (НNI), микротвердость (HMI), модуль Юнга (E), индексы пластичности (H/E) и сопротивления (H3/E2), ...
Microstructures generated in AISI 316L stainless steel by Vickers and Berkovich indentations

GRABCO, Daria; SHIKIMAKA, Olga; PYRTSAC, Constantin; PRISACARU, Andrian; BARBOS, Zinaida; BIVOL, Mihaela; ALEXANDROV, Sergei; VILOTIC, Dragisha; VILOTIC, Marko (Elsevier, 2021)

The work aimes for studying the specifics of deformation of AISI 316L stainless austenitic steel under the conditions of micro severe plastic deformation (mSPD) created locally at the submicro and micro levels using Berkovich ...
Micro- and macro-mechanical properties of aluminophosphate glasses depending on their compozition and loading conditions

SHIKIMAKA, O.; GRABCO, D.; SAVA, B. A.; ELISA, M.; BOROICA, L.; HAREA, E.; PYRTSAC, C.; PRISACARU, A.; SPOIALA, D. (Institutul de Fizică Aplicată al AŞM, 2014)

In this study the deformation peculiarities of aluminophosphate glasses (Li2O-Al2O3-BaO-La2O3-P2O5) doped with Dy, Tb and Fe were investigated at concentated load action (indentation) and uniaxial compression. Dynamic ...
Mechanical properties of the coating/substrate composite system: Nanostructured copper films on a LiF substrate

GRABKO, D. Z.; PYRTSAK, K. M.; GIMPU, L. Z.; VOLODINA, G. F. (Institutul de Fizică Aplicată al AŞM, 2016)

The study of a series of composite structures (CSs) such as CS-1, CS-2, and CS-3 being “soft film/soft substrate” systems revealed much new information on the mechanical properties of these materials. The general and ...
Механические свойства композитной системы типа «слой/подложка»: наноструктурные пленки меди на подложке LiF

ГРАБКО, Д.; ПЫРЦАК, К.; ГИМПУ, Л.; ВОЛОДИНА, Г. (Institutul de Fizică Aplicată al AŞM, 2016)

Изучение серии композитных структур КС-1, КС-2 и КС-3, принадлежащих к типу систем «мягкий слой/мягкая подложка», выявило много новых сведений относительно механических свойств данных материалов. Обнаружены общие и ...
Mechanical properties of polycrystalline copper and single-crystal LiF initial components for composite system Cu/LiF

GRABCO, D. Z.; PYRTSAC, K. M.; SHIKIMAKA, O. A. (Institutul de Fizică Aplicată al AŞM, 2016)

The paper deals with an investigation of mechanical properties and deformation features of polycrystalline copper and single-crystal LiF under dynamic nano/microindentation. It is shown that the values of hardness and ...
Механические свойства поликристаллической меди и монокристалла LiF, исходных компонент для получения композитной системы Cu/LiF

ГРАБКО, Д.; ПЫРЦАК, К.; ШИКИМАКА, О. (Institutul de Fizică Aplicată al AŞM, 2016)

Исследованы механические свойства и особенности деформирования поликристаллической меди и монокристаллического LiF при динамическом наномикроиндентировании. Установлена зависимость величины твердости и модуля Юнга от ...
Mechanical properties of one-dimensional coordination polymer [Cu(adi)(4-pyao)2]n

CROITOR, L.; COROPCEANU, E. B.; GRABCO, D. Z.; PYRTSAC, C.; FONARI, M. S. (Institutul de Fizică Aplicată al AŞM, 2014)

Blue block crystals of title compound, [Cu(adi)(4-pyao)2]n 1 were obtained by blending the solution of copper (II) fluoride with 4-pyridine-aldoxime (4-pyao) and adipic acid (H2adi). X-ray single crystal structure analysis ...
Loading rate dependent relaxation under indentation of borophosphate glass

SHIKIMAKA, O.; PYRTSAC, C.; BARBOS, Z.; SAVA, B. A.; BOROICA, L.; ELISA, M. (Institutul de Fizică Aplicată al AŞM, 2018)

The plasticity of glasses under compressive and shear stresses is governed by 2 main mechanisms: densification and shear flow. The relative contribution of each of these mechanisms depends on the glass structure and its ...
Influence of the Loading Regime of Indentation on the Hardness of Phosphate Glass

POPA, Mihaela; SHIKIMAKA, Olga; GRABCO, Daria; SAVA, Bogdan A.; BOROICA, Lucica; ELISA, Mihail; PYRTSAC, Constantin; PRISACARU, Adrian (Institutul de Fizică Aplicată al AŞM, 2017)

In this study a new composition of phosphate glass (56,66LiPO3 28,33Al(PO3)3-10Ba(PO3)2-2La2O3-3RE2O3 (RE = Dy, Tb)) obtained by sol-gel method is investigated from the point of view of mechanical behavior. For this purpose ...
Indium-tin-oxide thin film strain-sensor behaviors study using cyclic indentation

HAREA, E. E.; AIFANTIS, K. E.; PYRTSAC, K. M.; POPA, M. N.; GHIMPU, L. (Institutul de Fizică Aplicată al AŞM, 2014)

ITO films based sensors are largely studied last two decades. Piezoelectric properties were investigated depending on parameters and suitable manufacturing methods, ITO film thickness, thermal treatment etc. They belong ...
Indentation and plastic properties of MgO single crystals in nano and submicrovolumes

GRABCO, D. Z.; PYRTSAC, C. M. (Institutul de Fizică Aplicată al AŞM, 2016)

The strength and plastic properties of MgO single crystals have been thoroughly studied in microvolumes [1–3]. However, it has been proved on various materials that a reduction in the characteristic dimensions of an object ...
Hardness of the Cu thin films grown on the MgO substrate

GRABCO, D.; PYRTSAC, C.; GHIMPU, L. (Institutul de Fizică Aplicată al AŞM, 2014)

In this paper we studied the mechanical propeties of Cu thin films grown on MgO ( 4) substrate. The Cu films were obtained by the method of magnetron sputtering (with Magnetron Sputtering RF) at room temperature with ...
Giant quantum oscillations of the magnetothermoelectric coefficient in semimetallic Sb-Bi and Sb-As alloys

MUNTYANU, F. M.; PYRTSAK, K. M.; GILEVSKI, A. (Springer Nature Switzerland, 2001)

Quantum oscillations of the magnetothermoelectric coefficient αii(B) are investigated in semimetallic Sb-Bi and Sb-As alloys in stationary magnetic fields up to 15 T and at temperatures from 1.9 to 30 K. Quantum oscillations ...
Гигантские квантовые осцилляции магнитотермоэдс в полуметаллических сплавах Sb с Bi и As

МУНТЯНУ, Ф. М.; ПЫРЦАК, К. М.; ГИЛЕВСКИ, А. (Российская академия наук, 2001)

Исследованы особенности квантовых осцилляций в магнитотермоэдс α ii(В) в полуметаллических сплавах Sb с Bi и As в стационарных магнитных полях до 15Т и при температурах 1.9-30К. При ориентации продольного или поперечного ...
Fracture toughness and hardness at micro- and nanoindentation of phosphate glasses depending on their composition

POPA, M.; SHIKIMAKA, O.; GRABCO, D.; SAVA, B. A.; BOROICA, L.; ELISA, M.; PYRTSAC, C.; BARBOS, Z.; BELEI, I. (Institutul de Fizică Aplicată al AŞM, 2016)

Two groups of glasses of a basic aluminophosphate (Al2O3–P2O5–Li2O–BaO–La2O3) composition (APG) doped with Dy2O3, Tb2O3 and Fe2O3, and borophosphate (B2O3–P2O5–Li2O–Al2O3–ZnO) composition (BPG) codoped with Dy2O3–Tb2O3, ...
Effects of Anion and Bipyridyl Bridging Ligand Identity on the Co(II) Coordination Networks

CROITOR, Lilia; COROPCEANU, Eduard B.; CHISCA, Diana; BACA, Svetlana G.; LEUSEN van, Jan; KÖGERLER, Paul; BOUROSH, Polina; KRAVTSOV, Victor Ch.; GRABCO, Daria; PYRTSAC, Constantin; FONARI, Marina S. (American Chemical Society, 2014)

Five new coordination polymers, {[Co(OAc)2(bpe)(H2O)]•0.5(dmf)}n (1), {[Co(bpy)2(H2O)4][Co(tfa)(bpy)2(H2O)3](tfa)3•1.5(bpy)}n (2), [Co(tfa)2(dps)4]n (3), {[Co(tfa)2(bpe)4]•H2O}n (4), and [Co(tfa)2(bpp)4]n (5) (where AcO– ...
Densification contribution as a function of strain rate under indentation of terbium-doped aluminophosphate glass

SHIKIMAKA, Olga; GRABCO, Daria; SAVA, Bogdan Alexandru; ELISA, Mihail; BOROICA, Lucica; HAREA, Evghenii; PYRTSAC, Constantin; PRISACARU, Andrian; BARBOS, Zinaida (Springer Nature Switzerland, 2016)

In this work, the strain rate effect on the deformation processes under Berkovich indentation of Tb-doped aluminophosphate glass has been investigated. It is shown that both densification and shear flow, adopted as main ...
Cyclic Nanoindentation for Examination of the Piezoresistivity and the Strain-Sensor Behavior of Indium-Tin-Oxide Thin Films

HAREA, E. E.; AIFANTIS, K. E.; PYRTSAC, K. M.; GHIMPU, L. (Springer Nature Switzerland, 2015)

The piezoresistivity of indium-tin-oxide (ITO) thin films was investigated using the three point bending method combined with cyclic indentation. The 500 nm thick ITO films were deposited on glass slides using magnetron ...

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