Technical Capabilities of Concrete and its Structure Defects

2019 ◽  
Vol 974 ◽  
pp. 255-260
Author(s):  
Ludmila A. Suleymanova
Keyword(s):  
Building Materials ◽  
Materials Science ◽  
Structure Defects ◽  
Recent Advances ◽  
Physicochemical Basis ◽  
Strength And Durability ◽  
New Generation ◽  
Potential Use ◽  
Durability Of Concrete

Theoretical and experimental materials for analyzing the technical capabilities of concrete are generalized and the physicochemical basis for the strength and durability of concrete is developed on the basis of the recent advances in building materials science and other sciences. That may increase the traditional concrete potential use and most importantly – to create the most firm and durable concrete of the new generation.

The Contribution of Intermediate-Voltage, High-Resolution Electron Microscopy In Materials Science: An Appraisal

1990 ◽  
Vol 48 (1) ◽  
pp. 478-479
Author(s):  
John L. Hutchison
Keyword(s):  
High Resolution ◽  
Materials Science ◽  
High Resolution Electron Microscopy ◽  
Optical Diffraction ◽  
The Past ◽  
Resolution Electron ◽  
Extreme Sensitivity ◽  
Electron Microscopes ◽  
New Generation ◽  
Small Metal Particles

Over the past five years or so the development of a new generation of high resolution electron microscopes operating routinely in the 300-400 kilovolt range has produced a dramatic increase in resolution, to around 1.6 Å for “structure resolution” and approaching 1.2 Å for information limits. With a large number of such instruments now in operation it is timely to assess their impact in the various areas of materials science where they are now being used. Are they falling short of the early expectations? Generally, the manufacturers’ claims regarding resolution are being met, but one unexpected factor which has emerged is the extreme sensitivity of these instruments to both floor-borne and acoustic vibrations. Successful measures to counteract these disturbances may require the use of special anti-vibration blocks, or even simple oil-filled dampers together with springs, with heavy curtaining around the microscope room to reduce noise levels. In assessing performance levels, optical diffraction analysis is becoming the accepted method, with rotational averaging useful for obtaining a good measure of information limits. It is worth noting here that microscope alignment becomes very critical for the highest resolution.In attempting an appraisal of the contributions of intermediate voltage HREMs to materials science we will outline a few of the areas where they are most widely used. These include semiconductors, oxides, and small metal particles, in addition to metals and minerals.

scholarly journals Review on advances in microcrystalline, nanocrystalline and ultrananocrystalline diamond films-based micro/nano-electromechanical systems technologies

2021 ◽  
Vol 56 (12) ◽  
pp. 7171-7230
Author(s):  
Orlando Auciello ◽  
Dean M. Aslam
Keyword(s):  
Materials Science ◽  
Positive Impact ◽  
Diamond Films ◽  
Energy Generation ◽  
Nanoelectromechanical Systems ◽  
Environmental Sensors ◽  
Implantable Biosensors ◽  
Ultrananocrystalline Diamond ◽  
Film Synthesis ◽  
New Generation

AbstractA comprehensive review is presented on the advances achieved in past years on fundamental and applied materials science of diamond films and engineering to integrate them into new generations of microelectromechanical system (MEMS) and nanoelectromechanical systems (NEMS). Specifically, the review focuses on describing the fundamental science performed to develop thin film synthesis processes and the characterization of chemical, mechanical, tribological and electronic properties of microcrystalline diamond, nanocrystalline diamond and ultrananocrystalline diamond films technologies, and the research and development focused on the integration of the diamond films with other film-based materials. The review includes both theoretical and experimental work focused on optimizing the films synthesis and the resulting properties to achieve the best possible MEMS/NEMS devices performance to produce new generation of MEMS/NEMS external environmental sensors and energy generation devices, human body implantable biosensors and energy generation devices, electron field emission devices and many more MEMS/NEMS devices, to produce transformational positive impact on the way and quality of life of people worldwide.

REPORTS OF THE TSHA ISSUE 293 (PART I)

2021 ◽  
Author(s):  
L. V. Verzunova ◽  
Keyword(s):  
Information Technologies ◽  
Building Materials ◽  
Materials Science ◽  
Land Reclamation ◽  
Environmental Safety ◽  
Scientific Conference ◽  
Industrial Complex ◽  
Land Protection ◽  
Complex Development ◽  
Livestock Products

The collection includes articles based on the reports of scientists of the K. A. Timiryazev RGAU-MSHA, other universities and research institutions at the International Scientific Conference dedicated to the 155th anniversary of the K. A. Timiryazev RGAU-MSHA, which was held on December 2-4, 2020. The materials are presented on topical issues: land reclamation, reclamation, land protection and water supply, water resources management, hydraulic structures on hydro-reclamation systems; civil, industrial and agro-industrial construction, expertise and evaluation of industrial, civil buildings and building materials science; technosphere and environmental safety; reclamation and construction machines; information technologies in the agro-industrial complex; development of sheep and goat breeding in modern conditions; veterinary medicine and safety of livestock products, technologies for the production of feed and full nutrition of animals, biology, private zootechny; beekeeping and aquaculture.

A discussion on building technology in the 1980s - The contribution of the materials scientist

1972 ◽  
Vol 272 (1229) ◽  
pp. 585-593 ◽  
Keyword(s):  
Building Materials ◽  
Materials Science ◽  
Surface Coatings ◽  
Glass Technology ◽  
Teaching And Research ◽  
Building Technology ◽  
Recent Innovation ◽  
Conservative Attitude ◽  
The Common ◽  
Cement And Concrete

Some examples are given of recent innovation in building materials which show that the common impression that there is little innovation is false. There has been, however, a conservative attitude, and design has to some extent been hampered by the need to choose materials from the existing catalogue. The pace of innovation is likely to be accelerated in the future by two trends: specification by performance and the emergence of teaching and research in materials science. Current research and applications in the fields of cement and concrete, glass technology, metals, plastics and surface coatings are mentioned by way of illustration and an estimate of future progress is made.

Five-Membered Hetarene N-Oxides: Recent Advances in Synthesis and Reactivity

Synthesis ◽  
2021 ◽  
Author(s):  
Leonid Fershtat ◽  
Fedor Teslenko
Keyword(s):  
Transition Metal ◽  
Medicinal Chemistry ◽  
Materials Science ◽  
State Of The Art ◽  
Short Review ◽  
Advanced Materials ◽  
Metal Free ◽  
Recent Advances ◽  
Application Potential ◽  
Metal Catalyzed

Five-membered heterocyclic N-oxides attracted special attention due to their strong application potential in medicinal chemistry and advanced materials science. In this regard, novel methods for their synthesis and functionalization are constantly required. In this short review, recent state-of-the-art achievements in the chemistry of isoxazoline N-oxides, 1,2,3-triazole 1-oxides and 1,2,5-oxadiazole 2-oxides are briefly summarized. Main routes to transition-metal-catalyzed and metal-free functionalization protocols along with mechanistic considerations are outlined. Transformation patterns of the hetarene N-oxide rings as precursors to other nitrogen heterocyclic systems are also presented.

Thermodynamics of Solid-Phase Exchange Reactions Limiting the Subsolidus Structure of the System MgO-Al2O3-FeO-TiO2

2021 ◽  
Vol 1038 ◽  
pp. 177-184
Author(s):  
Oksana Borisenko ◽  
Sergey Logvinkov ◽  
Galina Shabanova ◽  
Oksana Myrgorod
Keyword(s):  
Materials Science ◽  
Solid Phase ◽  
Structural Materials ◽  
The State ◽  
Cement Clinker ◽  
Multicomponent Systems ◽  
Exchange Reactions ◽  
Chemical Corrosion ◽  
Physicochemical Basis ◽  
Rotary Kilns

The basis of modern materials science is multicomponent systems, on their basis it is possible to create various combinations of phases in structural materials with a set of specified properties. The investigated system MgO-Al2O3-FeO-TiO2 is promising for the production of periclase-spinel refractories used as lining of rotary kilns during cement clinker firing, which are highly resistant to chemical corrosion when exposed to a gas environment and cement clinker components; thermomechanical stresses. However, in the reference literature and scientific articles, no information was found on the structure of the four-component diagram of the state of the MgO-Al2O3-FeO-TiO2 system, partial elements of its structure are given only in the composition of multicomponent systems [1-3]. Thus, research to the study of the subsolidus structure of the MgO-Al2O3-FeO-TiO2 system, which is the physicochemical basis for the development of compositions of periclase-spinel refractories, is urgent.

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