Structure Formation in Nickel-Polytetrafluorethylene Composite Materials upon Explosive Pressing of Powders

2020 ◽  
Vol 11 (4) ◽  
pp. 982-990
Author(s):  
N. A. Adamenko ◽  
A. V. Kazurov ◽  
G. V. Agafonova ◽  
D. V. Savin
Keyword(s):  
Composite Materials ◽  
Structure Formation ◽  
Explosive Pressing

scholarly journals Particularities of structure formation of aluminum-copper composite materials manufactured by casting technology

2020 ◽  
pp. 116-121
Author(s):  
V. A. Kalinichenko ◽  
A. S. Kalinichenko ◽  
S. V. Grigoriev
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Structure Formation ◽  
Matrix Material ◽  
Matrix Alloy ◽  
Alloying Elements ◽  
Casting Technology ◽  
The Matrix ◽  
Reinforcing Material ◽  
Copper Composite

To create friction pairs operating in severe working conditions, composite materials are now increasingly used. Composite materials obtained with the use of casting technologies are of interest due to the possibility to manufacture wide range of compositions at low price compared to powder metallurgy. Despite the fact that many composite materials have been sufficiently studied, it is of interest to develop new areas of application and give them the properties required by the consumer. In the present work the composite materials on the basis of silumin reinforced with copper granules were considered. Attention was paid to the interaction between the matrix alloy and the reinforcing phase material as determining the properties of the composite material. The analysis of distribution of the basic alloying elements in volume of composite material and also in zones of the interphases interaction is carried out. The analysis of the possibility of obtaining a strong interphase zone of contact between the reinforcing component and the matrix material without significant dissolution of the reinforcing material is carried out.

Effect of the Additive of Y2O3 on the Structure Formation and Properties of Composite Materials Based on AlN–SiC

2018 ◽  
Vol 40 (1) ◽  
pp. 8-15 ◽  
Author(s):  
T. B. Serbenyuk ◽  
T. O. Prikhna ◽  
V. B. Sverdun ◽  
N. V. Sverdun ◽  
V. Ye. Moshchil’ ◽  
...  
Keyword(s):  
Composite Materials ◽  
Structure Formation

scholarly journals Development of quality functionals of kinetic processes for the synthesis of composite materials with specified parameters of structure and properties

2020 ◽  
Vol 224 ◽  
pp. 02019
Author(s):  
A Bormotov
Keyword(s):  
Mathematical Method ◽  
Composite Materials ◽  
Polymer Composites ◽  
Structure Formation ◽  
High Viscosity ◽  
Transient Processes ◽  
Structure And Properties ◽  
Mathematical Methods ◽  
Kinetic Processes ◽  
Necessary And Sufficient

The processes of structure formation and features of polymer composites with special properties are investigated, the main kinetic processes that have a decisive influence on the structure formation and properties of polymer composites are identified. The expediency of considering kinetic (transient) processes as a necessary and sufficient sign of the structure formation of a thermosetting is substantiated. A mathematical method for the synthesis of polymer composite materials of increased density using the quality functionals of kinetic (transient) processes is proposed. The proposed mathematical methods and models allow to effectively solve the problem of plasticization and modification of high-viscosity polymers, as well as to carry out multi-criteria synthesis of composite materials with strictly specified parameters of structure and properties using the quality functionals of kinetic (transient) processes.

scholarly journals RESEARCH OF STRUCTURAL CHANGES IN EXPLOSIVE PRESSING OF POLYMERIC COMPOSITE BLENDS

2020 ◽  
pp. 37-42
Author(s):  
N. Adamenko ◽  
G. Agafonova ◽  
A. Kazurov ◽  
D. Savin
Keyword(s):  
Composite Materials ◽  
Molybdenum Disulfide ◽  
Polymer Composite ◽  
Structural Changes ◽  
Polymeric Composite ◽  
Polymer Composite Materials ◽  
Hybrid Matrix ◽  
Antifriction Properties ◽  
Increased Strength ◽  
Explosive Pressing

The method of X-ray diffraction analysis was used to study polymer composite materials with a hybrid matrix in the form of blends of thermoplastic polymers of polytetrafluoroethylene PTFE with rigid high-temperature resistant polyarylate PA filled with molybdenum disulfide after explosive pressing with a pressure of 0.9-4.6 GPa. The studies were carried out with the aim of developing the technology of explosive pressing of polymer composite materials with a hybrid matrix, filled with molybdenum disulfide, with increased strength and antifriction properties.

scholarly journals STUDY OF THE STRUCTURE OF HIGHLY FILLED FLUOROPLAST-ALUMINUM COMPOSITES

2020 ◽  
pp. 25-29
Author(s):  
N. A. Adamenko ◽  
A. V. Kazurov ◽  
D. V. Savin ◽  
G. V. Agafonova ◽  
A. S. Ageikin
Keyword(s):  
Structure Formation ◽  
Metal Particles ◽  
Aluminum Composites ◽  
Monolithic Material ◽  
Adhesive Interaction ◽  
Metal Frame ◽  
Static Pressing ◽  
Dispersed Aluminum ◽  
Explosive Pressing

Structure formation in fluoroplastic-aluminum composites obtained by static and explosive pressing has been investigated. The concentration of dispersed aluminum was 50 and 70% vol. In fluoroplastic-aluminum composites, after static pressing, spalling of metal particles, formed during the preparation of a microsection, was found, which indicates low adhesion of the polymer and metal. The production of fluoroplastic-aluminum composites using explosive pressing leads to the formation of a monolithic material with a high adhesive interaction of the components and the formation of a metal frame.

Waterproof Magnesia Binder for Composite Materials

2016 ◽  
Vol 712 ◽  
pp. 182-187 ◽  
Author(s):  
Natalia A. Mitina ◽  
Inna B. Revva ◽  
Alexander A. Ditts ◽  
Dmitriy Simonov
Keyword(s):  
Aqueous Solution ◽  
Composite Materials ◽  
Structure Formation ◽  
Magnesium Hydroxide ◽  
Hydraulic Properties ◽  
Water Resistance

The paper presents a study of structure formation during the hardening of a new water resistant hydraulic magnesium cement. Improvement of water resistance and the manifestation of hydraulic properties in magnesium cement are associated with the use of a fundamentally new mixing liquid involving a magnesium bicarbonate solution. Use of this solution makes possible for the magnesium composition to harden not only in air, but also in water. The Coefficient of resistance is 1.0–1.8. When mixing the magnesium cement with an aqueous solution of magnesium bicarbonate, the main products of hardening are magnesium hydroxide and magnesium hydrocarbonates. The increase of the hydrocarbon phase contributes to the strengthening characteristics of magnesia compositions. Magnesium hydrocarbonates are insoluble in water, which provides the increased water resistance of magnesia compositions and the opportunity to harden and gain strength in water.

scholarly journals RESEARCH OF THE CRYSTALLINE STRUCTURE OF POLYMERIC COMPOSITE MIXTURES AFTER EXPLOSIVE PRESSING

2020 ◽  
pp. 23-27
Author(s):  
N. A. Adamenko ◽  
G. V. Agafonova ◽  
D. V. Savin ◽  
A. I. Bogdanov ◽  
D. A. An ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Composite Materials ◽  
Aluminum Oxide ◽  
Polymeric Composite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Antifriction Properties ◽  
Ultra High Molecular Weight ◽  
Explosive Pressing ◽  
Pressing Technology

The method of X-ray diffraction analysis was used to study polymer composites based on thermoplastic polymers of ultra-high molecular weight polyethylene UHMWPE with β-sialon and polytetrafluoroethylene PTFE with aluminum oxide Al2O3 after static and explosive pressing. The studies were carried out with the aim of developing explosive pressing technology for polymer composite materials with enhanced strength and antifriction properties.

scholarly journals RESEARCH OF FEATURE OF STRUCTURE FORMATION IN PTFE-ALUMINUM COMPOSITE MATERIALS DURING SINTERING

2020 ◽  
pp. 42-46
Author(s):  
N. Adamenko ◽  
A. Kazurov ◽  
D. Savin ◽  
G. Agafonova
Keyword(s):  
Composite Materials ◽  
Structure Formation ◽  
Free Volume ◽  
Closed Volume ◽  
Aluminum Composite ◽  
Interfacial Separation ◽  
Lower Porosity ◽  
Static Pressing ◽  
Dispersed Aluminum

The structure formation in fluoroplastic-aluminum composite materials during sintering after static pressing was studied. The concentration of dispersed aluminum was 30% vol.. After sintering, interfacial separation was observed in the fluoroplastic-aluminum composite materials, which is formed during crystallization due to shrinkage, which indicates a low adhesion of the filler to the polymer. Sintering of composite materials in a closed volume leads to the formation of a material with a lower porosity than when sintering in a free volume.

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