Synergetic effect of temperature and pressure on energetic and structural characteristics of {ZIF-8 + water} molecular spring

ABSTRACTMeasurements of the residual stress in polysilicon films made by Low Pressure Chemical Vapor Deposition (LPCVD) at different deposition pressures and temperatures are reported. The stress behavior of phosphorus (P)-ion implanted/annealed polysilicon films is also reported. Within the temperature range of deposition, 580 °C to 650 °C, the stress vs deposition temperature plot exhibits a transition region in which the stress of the film changes from highly compressive to highly tensile and back to highly compressive as the deposition temperature increases. This behavior was observed in films that were made by the LPCVD process at reduced pressures of 210 and 320 mTORR. At deposition temperatures below 590 °C the deposit is predominantly amorphous, and the film is highly compressive; at temperatures above 610 °C (110) oriented polycrystalline silicon is formed exhibiting high compressive residual stress.

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Effect of temperature and pressure on the composition of oils from the Bazhenovskaya Formation in the latitudinal segment of the Ob River area

Geochemistry International ◽

10.1134/s0016702906090072 ◽

2006 ◽

Vol 44 (9) ◽

pp. 925-934

Author(s):

O. F. Stasova ◽

A. I. Larichev ◽

N. I. Larichkina

Keyword(s):

Effect Of Temperature ◽

Ob River ◽

Temperature And Pressure

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Effect of temperature and pressure on the degradation of cement asphalt mortar exposed to water

Construction and Building Materials ◽

10.1016/j.conbuildmat.2012.03.002 ◽

2012 ◽

Vol 34 ◽

pp. 570-574 ◽

Cited By ~ 45

Author(s):

Hu Shuguang ◽

Zhang Yunhua ◽

Wang Fazhou

Keyword(s):

Effect Of Temperature ◽

Cement Asphalt Mortar ◽

Temperature And Pressure ◽

Asphalt Mortar

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NEAR HYDRATION OF SINGLY CHARGED MONOATOMIC IONS IN EXTREMELY DILUTED SOLUTIONS: THE EFFECT OF TEMPERATURE AND PRESSURE

Bulletin of the National Technical University KhPI Series Chemistry Chemical Technology and Ecology ◽

10.20998/2079-0821.2021.01.04 ◽

2021 ◽

pp. 24-31

Author(s):

Viktor Ivanovych Булавин ◽

Ivan Nikolajevych V’unik ◽

Andrii Viktorovych Kramarenko ◽

Alexandr Ivanovych Rusinov

Keyword(s):

Ion Solvation ◽

Effect Of Temperature ◽

Temperature Growth ◽

Translational Displacement ◽

Na Ions ◽

Extremely Diluted Solutions ◽

Temperature And Pressure ◽

Singly Charged ◽

Direction Opposite ◽

Structure Breaking

The diffusion coefficient and the distance of translational displacement of Li+, Na+ K+, Cs+, Cl– and Br– ions in water at 298.15 K – 423.15 K (25 K step) and pressure from 0.0981 to 784.5 MPa (98.1 MPa step) were calculated from the literature data on limiting molar electrical conductivity. The values for these ions increase with pressure growth from 0.0981 to 98.1 MPa at 298.15 K. Further pressure increase (up to 785 MPa) leads to decrease in . Temperature growth under isobaric conditions leads to an increase in . Parameter (– ri) (deviation from the Stokes–Einstein law, ri is ion structural radius) was used as a criterion for the type of ion solvation. It is shown that Li+ and Na+ ions behave as cosmotropes, or positively solvated structure–forming ions having (– ri) > 0. The Cs+, Cl–, Br– ions behave as chaotropes, or negatively solvated structure–breaking ions having (– ri) < 0. For the K+ ion, the (– ri) deviation is alternating. At 0.0981 MPa and 298.15 K, the K+ ion is a chaotrope. But at 320 K (Tlim) parameter (– ri) = 0. It corresponds to the transition from negative to positive solvation. Above Tlim at P = const, the K+ ion is a cosmotrope. At 298.15 K and up to 98.1 MPa, the pressure causes the same change in the (– ri) deviation as the temperature. On the contrary, at 320 K and higher, the pressure affects the near hydration in the direction opposite to the temperature.

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Study of synergetic effect of the complex polycarboxylate anti-corrosion additive in the model of pore concrete fluid

Vestnik MGSU ◽

10.22227/1997-0935.2020.6.824-833 ◽

2020 ◽

pp. 824-833

Author(s):

Linar N. Talipov ◽

Evgeny G. Velichko ◽

Vyacheslav S. Semenov

Keyword(s):

Sodium Nitrite ◽

Electron Probe Microanalysis ◽

Electron Probe ◽

Structural Characteristics ◽

Synergetic Effect ◽

Gel Permeation Chromatography ◽

13C Nmr Spectroscopy ◽

Protective Film ◽

Film Layer ◽

Pore Liquid

Introduction. Corrosion of reinforcement in concrete structures is rather expensive for the economy of any country. Current statutory documents offer two main directions — primary and secondary protection. One of the promising areas of primary protection methods is the use of complex anti-corrosion additives in concrete due to its technological simplicity and economic efficiency. Passivators and surfactants (SAS), as components of such additives, are of particular interest. Sodium nitrite is offered as a passivator, and polycarboxylate molecules (PCE) — as a SAS. The additive of sodium nitrite together with PCE has a visual synergistic effect. Materials and methods. Identification of structural characteristics of the molecules of the obtained PCE polymers was determined by methods of exclusion gel-permeation chromatography and 13C NMR spectroscopy. To study the synergetic effect of NaNO2 + PCE additive, the samples were kept in the models of pore liquid, after which the morphology of their surface was studied by methods of scanning electron microscopy and electron probe microanalysis. Results. The texture and surface color of the presented micrographs indicate surface formations on the samples stored in the models of pore liquid with different anti-corrosion additives. Electron probe microanalysis showed increased concentrations of carbon, oxygen and sodium on the surface of samples stored in pore concrete liquid models with the addition of a complex anti-corrosion additive of sodium nitrite and PCE, which indicates increased concentrations of PCE and possible increased pH on the steel surface. Based on the data acquired, the mechanism of formation of a protective film layer using complex anti-corrosion additive NaNO2 + PCE is offered. Conclusions. Justification of synergetic effect of complex polycarboxylate anti-corrosion additive in the model of concrete pore liquid opens up prospects for research of such additives to the concrete model.

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Four Types of LME Cracks in RSW of Zn-Coated AHSS

Welding Journal ◽

10.29391/2020.99.008 ◽

2020 ◽

Vol 99 (3) ◽

pp. 75s-92s ◽

Cited By ~ 1

Author(s):

SIVA PRASAD MURUGAN ◽

◽

YEONG-DO PARK ◽

VIJEESH VIJAYAN ◽

CHANGWOOK JI

Keyword(s):

Tensile Stress ◽

Synergetic Effect ◽

High Strength Steels ◽

High Strength ◽

Liquid Zinc ◽

Effect Of Temperature ◽

Advanced High Strength Steels ◽

Type D ◽

The Difference

Zinc-coated advanced high-strength steels are known to be susceptible to liquid metal embrittlement (LME) cracking during resistance spot welding (RSW). Despite numerous reports with regard to LME during RSW, a systematic approach has not been proposed for the classification of cracks based on the cracking mechanism. The objective of this study was to characterize the LME cracks at various RSW locations, and thereby propose a classification method to identify the mechanism of the LME cracks at each location. The experimental results revealed the LME cracks were concentrated at certain weld locations and exhibited different features in terms of length, number, and orientation, owing to the synergetic effect of temperature, stress, microstructure, time of exposure to liquid zinc, and time of exposure to tensile stress at the corresponding lo-cations. Thus, the LME cracks were classified into four categories, namely type A, type B, type C, and type D, based on the formation location. The effect of time of exposure to liquid zinc and tensile stress on LME cracking revealed the time dependency of LME in RSW. The nature of contact be-tween the electrode and the sheet, and the heat input during welding, were found to be the main reasons for the difference in the thermal, mechanical, and metallurgical characteristics of various crack locations, which caused the formation of various LME crack types.

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