Особенности механических свойств фосфатных стекол, легированных редкоземельными элементами, при индентировании
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ГРАБКО, Дарья; ШИКИМАКА, О.; ELIŞA, Mihail; ПЫРЦАК, К.; ПРИСАКАРУ, Андриан; САВА, Б.; БОРОЙКА, Л.; БАРБОС, Зинаида; ФЕРАРУ, И.; УРСУ, Д.. Особенности механических свойств фосфатных стекол, легированных редкоземельными элементами, при индентировании . In: Электронная обработка материалов. 2012, nr. 4(48), pp. 83-93. ISSN 0013-5739.
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Электронная обработка материалов
Numărul 4(48) / 2012 / ISSN 0013-5739 /ISSNe 2345-1718

Особенности механических свойств фосфатных стекол, легированных редкоземельными элементами, при индентировании

Pag. 83-93

Грабко Дарья1, Шикимака О.1, Elişa Mihail2, Сава Б., Боройка Л., Пырцак К.1, Присакару Андриан1, Барбос Зинаида, Ферару И., Урсу Д.
 
1 Институт прикладной физики АНМ,
2 Institutul de Fizică şi Inginerie Nucleară "Horia Hulubei" din Bucureşti
 
Disponibil în IBN: 20 ianuarie 2014


Rezumat

Изучены микроструктура, механические и термические свойства фосфатных стекол (ФС), легированных редкоземельными элементами (РЗЭ): Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Yb. Методом динамического индентирования оценены прочностные параметры ФС, их зависимость от величины нагрузки на индентор. Выделены три стадии деформирования: нанодеформирование; cубмикродеформирование; микродеформирование. Определены факторы, ответственные за каждую стадию. Показано, что прочностные свойства (модуль Юнга, твердость), а также термические характеристики (нижняя и верхняя температуры отжига, температура размягчения, температура стеклования) не проявляют четкой взаимосвязи с атомной массой и ионным радиусом редкоземельных элементов. Высказано предположение, что упругие и пластические свойства ФС могут определяться внутренней структурой стекол.

The microstructure, mechanical and thermal properties of phosphate glasses (PhGs) doped by rare-earth elements (REEs): Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Yb, were considered in the present paper. The PhGs strength parameters and their dependence on the load value modification were estimated by the dynamic indentation method. Three specific stages were revealed in the deformation process: nanodeformation; submicrodeformation; microdeformation. The factors responsible for each stage were detected. It was shown that strength properties (Young module, hardness) and thermal characteristics (lower and upper annealing temperature, softening temperature, vitrification temperature) do not exhibit an evident interconnection with the atomic mass and ionic radius of REE. An assumption was made that elastic and plastic properties of PhGs can be determined by the glass internal structure.

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<identifier identifierType='DOI'>10.1134/S1070328419030059</identifier>
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<creatorName>Coropceanu, E.B.</creatorName>
<affiliation>Institutul de Chimie, Moldova, Republica</affiliation>
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<creatorName>Rudic, V.F.</creatorName>
<affiliation>Institutul de Microbiologie şi Biotehnologie, Moldova, Republica</affiliation>
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<creator>
<creatorName>Cepoi, L.E.</creatorName>
<affiliation>Institutul de Microbiologie şi Biotehnologie, Moldova, Republica</affiliation>
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<affiliation>Institutul de Microbiologie şi Biotehnologie, Moldova, Republica</affiliation>
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<creator>
<creatorName>Lozan, V.I.</creatorName>
<affiliation>Institutul de Chimie, Moldova, Republica</affiliation>
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<creatorName>Chiriac, T.V.</creatorName>
<affiliation>Institutul de Microbiologie şi Biotehnologie, Moldova, Republica</affiliation>
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<creatorName>Miscu, V.G.</creatorName>
<affiliation>Institutul de Microbiologie şi Biotehnologie, Moldova, Republica</affiliation>
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<creatorName>Bulhac, I.I.</creatorName>
<affiliation>Institutul de Chimie, Moldova, Republica</affiliation>
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<creator>
<creatorName>Kravţov, V.H.</creatorName>
<affiliation>Institutul de Fizică Aplicată, Moldova, Republica</affiliation>
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<creator>
<creatorName>Bouroş, P.N.</creatorName>
<affiliation>Universitatea de Stat din Tiraspol, Moldova, Republica</affiliation>
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<title xml:lang='en'><p>Synthesis and Crystal Structure of [Co(DmgH) <sub>2</sub> (Thio) <sub>2</sub> ] <sub>2</sub> F[PF <sub>6</sub> ]. The Effect of Fluorine-Containing Co(III) Dioximates on the Physiological Processes of the Microalga Porphyridium cruentum</p></title>
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<publisher>Instrumentul Bibliometric National</publisher>
<publicationYear>2019</publicationYear>
<subjects>
<subject>biomass accumulation</subject>
<subject>Co(III) dioximatescrystal structure</subject>
<subject>lipid synthesis</subject>
<subject>red microalga</subject>
<subject>Porphyridium cruentum</subject>
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<date dateType='Issued'>2019-03-01</date>
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<description xml:lang='en' descriptionType='Abstract'><p>Abstract: New fluorine-containing cobalt(III) dioximates [Co(DmgH) <sub>2</sub> (Thio) <sub>2</sub> ] <sub>2</sub> F[PF <sub>6</sub> ] (I) and [Co(DmgH) <sub>2</sub> (Sam) <sub>2</sub> ] <sub>2</sub> [TiF <sub>6</sub> ] &middot; 4H <sub>2</sub> O (II) (DmgH = dimethylglyoxime monoanion, Thio = thiourea, Sam&nbsp;= sulfanilamide) were obtained. The structure of I was determined by X-ray diffraction (CIF file CCDC no.&nbsp;1852216). The crystals are cubic, space group (Formula Presented.). The octahedral coordination polyhedron of the metal is formed by the N <sub>4</sub> S <sub>2</sub> set of donor atoms of two DmgH&macr; ligands and two Thio molecules. The effect of compounds I and II and two previously described compounds of this class with fluorine anions, [Co(DmgH) <sub>2</sub> (Thio) <sub>2</sub> ] <sub>2</sub> [TiF <sub>6</sub> ] &middot; 2H <sub>2</sub> O (III) and [Co(DmgH) <sub>2</sub> (An) <sub>2</sub> ] <sub>2</sub> [ZrF <sub>6</sub> ] (IV) (An = aniline), on the physiological processes of the red microalga Porphyridium cruentum was studied. Complex III in concentration of 20 mg/L increased the microalga productivity by 20% and lipid biosynthesis by 17% and can be proposed for biotechnology applications.</p></description>
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