Equipment and technologies for the production and use of nanostructured materials

Abstract

This article is a continuation of the series devoted to the creation and application of nanomaterials and nanotechnologies in modern industry in general and in metallurgy, materials science and foundry production in particular. The article deals with the choice of equipment and the development of effective methods for obtaining nanomaterials. Examples of the application of the developed equipment, technologies and materials obtained in the Republic of Belarus and abroad are given.

Series of Photovoltaic Converters Based on Semiconductors with Intrinsic Photoconductivity

“…Another device structure that makes it possible to significantly expand the range of realized parameters values by the use of the combined technology is a structure based on several semiconductor materials epitaxially grown on a common sapphire substrate. Close values of a number of sapphire′s and many semiconductor materials` parameters (crystal lattice constant, thermal expansion coefficients) make it possible to fabricate device structures based on dissimilar materials [10][11][12][13]. Figure 7 shows the basic device structure of a photovoltaic converter based on semiconductor 1 with a deep multiply charged impurity which characteristics are controlled by optical radiation М generated by light-emitting diode 4-5. In this case the input optical signal S can be led into the PVC structure both from the side of the semiconductor layers S 1 , and through the substrate (S 2 ) since sapphire is also characterized by excellent optical properties in the near and middle IR optical range.…”

“…Figure 7 -Device structure that combines PVC structure with external optical control and a controlling light-emitting diode: 1 -PVC; 2, 3 -PVC contacts; 4-5 -light-emitting diode; 6, 7 -light-emitting diode contacts; 8 -sapphire substrate; S -measured optical signal; М -controlling optical signal; i -insulating immersion layer Such a structure (Figure 7) allows combining the technologies of light-emitting devices based on semiconductor compounds А 3 В 5 , photodetector structures based on Si, Ge, Si: Ge and other materials, integral structures of amplifier and signal processing circuits and also "Non-Silicon" technologies on one substrate [12,13]. This structure can also serve as a basis for designing functional PVCs.…”

Nanostructured TiAlCuN and TiAlCuCN coatings for spacecraft: effects of reactive magnetron deposition regimes and compositions

“…The design and formation of nanostructured coatings with high hardness, wear resistance, and resistance to radiation is one of the most important areas of research in the field of materials science nowadays. 1–5…”

Thermal processes under explosive loading of amorphous alloy powders

“…Currently, there is an increased interest in materials with a nanocrystalline structure, for which there are no operational limitations inherent in amorphous metals [13][14][15][16][17][18]. One of the ways to obtain nanocrystalline structures is controlled crystallization of amorphous alloys [19][20][21][22][23][24], so it seems relevant to discuss the issues of preserving the amorphous state of compacts of amorphous alloy powders during shock-wave processing.…”