Modification of the Leeb Impact Device for Measuring Hardness by the Dynamic Instrumented Indentation Method

Aleksander, Umanskii; Gogolinskiy, Kirill; Syaskо, V. А.; Artem, Golev

doi:10.3390/inventions7010029

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…The formation of a quality management system (QMS) of any type of activity of an organization or its individual divisions is generally based on the understanding, comprehensive analysis and control of information coming from the "inputs" and "outputs" of the system, which is described in the system of generally accepted international standards for quality assurance, as well as in the standards dedicated to the Lean Production [27,28,29].…”

Section: Results Of the Studymentioning

confidence: 99%

The approaches for assessing the quality of scientific research at St. Petersburg Mining university

Radushinsky

Kremcheeva²,

Смирнова³

et al. 2023

E3S Web of Conf.

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The article considers approaches to the development of criteria for assessing the quality of scientific research in St. Petersburg Mining University, Russia (Mining University), the functioning of which contains the main features of research university as well as of a scientific organization. The research methods include expert assessments, analysis and synthesis and other desk research methods. Based on the analysis of the results of the scientific activity of the organization in recent years, a set of basic quantitative indicators has been developed, as well as a set of additional qualitative indicators of the effectiveness of the scientific departments of the university. Qualitative indicators, including the rating assessment of the research carried out by the Scientific and Technical Council of the university, are designed to complement the widely used scientometric data. Thus, scientometric, financial indicators and a comprehensive (multifactorial) qualitative assessment can serve as criteria for the quality assessment for the scientific activity of the university. The information obtained is relevant for the formation of a quality management system for scientific research at Mining University, as well as for other research universities with a similar organizational structure. However, the conclusions obtained cannot be automatically extended to the procedures for the formation of quality management systems for scientific research in organizations of a different profile.

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Section: Results Of the Studymentioning

confidence: 99%

The approaches for assessing the quality of scientific research at St. Petersburg Mining university

Radushinsky

Kremcheeva²,

Смирнова³

et al. 2023

E3S Web of Conf.

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“…The materials used in the present work are silicone rubber and polyurethane as matrix, while micro-lead and nanoparticles are used as additives; a sensitive electrical scale for weighing small amounts of samples [15] with a hardness measuring instrument for measuring the rubber's hardness [16]; the (Shore-A) hardness tester (H-17A, Congenix-Wallac) tested hardness experimentally, English (Kingston) [17]. Silicone rubber is combined with a specific amount of (SiR80pphr-PU 20 pphr/micro-pb 300 pphr) nano-Pb powder (99.5% purity, 50 nm diameter) is then doped at quantities of (0, 0.2, 0.4, 0.6, 0.8 pphr) where the mixture was stirred for 15 minutes using a Stirrer (HT-120DX) and hexane to fill the gaps and homogenise the lead material by casting, to make nanocomposites of (SiR 80 /PU 20 /micro-pb 300 /nano-pb 0.8 ).…”

Section: Methodsmentioning

confidence: 99%

Influence of Lead Nanoparticles on Structural, Morphological, and Mechanical Characteristics of (SiR-PU/Micro-Pb) Composites and Radiation Shielding Applications

Naeem,

Al-Nesrawy,

Al-Maamori

2023

East Eur. J. Phys.

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This research includes the manufacture of a polymeric nanocomposite consisting of silicone rubber/polyurethane as a base, with the addition of the first filler of micro-lead with a ratio of 300 pphr and the second filler of nano-lead with different ratios (0, 0.2, 0.4, 0.6, 0.8 pphr). With the addition of hexane (liquid state) to the superposition using the casting technique at room temperature. The structural properties of the surfaces of the samples were measured using Fourier transformation spectroscopy (FT-IR) and the scanning electron microscope (SEM). In addition to studying the mechanical properties represented by each hardness, tensile, elongation, and elastic modulus. (FT-IR) showed the absence of a chemical reaction for all samples. While SEM measurements showed a homogeneous distribution of micro-lead and nano-lead in the presence of hexane equally, and there were no voids in the eyes of the prepared rubber equally. For the mechanical properties, we see that the hardness, tensile strength and modulus of elasticity continue to improve with the increase in the number of lead nanoparticles. And a decrease in elongation as a result of inverse proportion to the modulus of elasticity. From the results obtained, this composite can be used in gamma ray attenuation applications in shielding, especially in medical and industrial fields.

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Novel low-macroscopic-field emission cathodes for electron probe spectroscopy systems

Smerdov,

Mustafaev

2023

Journal of Applied Physics

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The current state of electron probe methods [including energy loss spectroscopy of inelastically scattered electrons (EELS)] is considered. The analysis concerning the issues of their application, challenges, and limitations is performed. Particular attention is paid to the fundamental limitations and the means to overcome those during electron probe methods’ subsequent development for the study of composite nanostructured materials. It is emphasized that the emitted electron energy spectrum dispersion (or electron energy distribution function width) is one of the main factors limiting a further increase in EELS energy resolution, although the use of direct detection sensors and monochromators allows one to approach the physical limit of this method. Novel low-macroscopic-field electron emitters are synthesized and investigated. Their properties are analyzed and compared with previously obtained specimens. Both energy and temporal resolutions of an EEL system utilizing the suggested cathodes are estimated. The comparison of its characteristics with the corresponding parameters of classical facilities is performed. The obtained results indicate the possibility to achieving a significant growth in energy and temporal resolutions as well as a decrease in the detection threshold of chemical elements with trace concentrations while maintaining relatively high emission current density values.

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Modification of the Leeb Impact Device for Measuring Hardness by the Dynamic Instrumented Indentation Method

Cited by 6 publications

References 29 publications

The approaches for assessing the quality of scientific research at St. Petersburg Mining university

The approaches for assessing the quality of scientific research at St. Petersburg Mining university

Influence of Lead Nanoparticles on Structural, Morphological, and Mechanical Characteristics of (SiR-PU/Micro-Pb) Composites and Radiation Shielding Applications

Novel low-macroscopic-field emission cathodes for electron probe spectroscopy systems

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