scholarly journals Structural features of layered composite materials based on titanium borides by free SHS compression

2019 ◽  
Vol 488 (3) ◽  
pp. 263-266
Author(s):  
P. M. Bazhin ◽  
A. M. Stolin ◽  
A. S. Konstantinov ◽  
A. P. Chizhikov ◽  
A. D. Prokopets ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Composite Materials ◽  
Ceramic Composite ◽  
Titanium Boride ◽  
Structural Features ◽  
Layered Composite ◽  
Titanium Borides ◽  
Temperature Shear ◽  
Combustion Processes

The work shows the structural features layered composite materials based on titanium boride on titanium alloy VT6 (Ti6Al4V) by the method of free SHS compression, which implements the combination of combustion processes and high-temperature shear deformation. The layered structure of the produced materials was established, the feature of the structure of the transition zone at the boundary of the ceramic composite - titanium alloy was studied in details.

Structural Features of Titanium Boride-Based Layered Composite Materials Produced by Free SHS Compression

2019 ◽  
Vol 488 (1) ◽  
pp. 246-248 ◽  
Author(s):  
P. M. Bazhin ◽  
A. M. Stolin ◽  
A. S. Konstantinov ◽  
A. P. Chizhikov ◽  
A. D. Prokopets ◽  
...  
Keyword(s):  
Composite Materials ◽  
Titanium Boride ◽  
Structural Features ◽  
Layered Composite

Features of Molding and Structure of Composite Materials Based on TiB/Ti, Obtained by Free SHS Compression Method

2020 ◽  
Vol 1009 ◽  
pp. 37-42
Author(s):  
Andrey Chizhikov ◽  
Alexander Konstantinov ◽  
Pavel Bazhin ◽  
Alexander Stolin
Keyword(s):  
High Temperature ◽  
Composite Materials ◽  
Combustion Temperature ◽  
Structural Features ◽  
Titanium Content ◽  
Compression Method ◽  
High Temperature Synthesis ◽  
Adiabatic Combustion Temperature ◽  
Liquid Titanium ◽  
Temperature Shear

The work presents the thermodynamic calculations of the adiabatic combustion temperature and the fraction of the liquid titanium phase during the chemical reaction of the initial titanium and boron powders with the initial titanium content from 5 to 80 wt. % during the synthesis of materials based on TiB-Ti. It is shown that with an increase in the preheating temperature of the initial samples to 500 °C, the combustion temperature of the selected composition increases from 3200 to 3600 K, and the fraction of the liquid phase increases from 40 to 80 %. The peculiarity of molding composite materials based on TiB-Ti under conditions combining self-propagating high-temperature synthesis (SHS) and high-temperature shear deformation is studied. These conditions are realized in the method of free SHS compression, which allows synthesizing, molding and obtaining compact material in tens of seconds without using special molds. It was found that the maximum degree of deformation of the synthesized material corresponds to 20-40 wt. % free titanium. For the selected compositions, compact composite materials were obtained by free SHS compression method, the structural features were studied, and the density and porosity of the central and regional parts of the samples were measured.

scholarly journals Thermo-Mechanical Behaviour of HfO2 Coatings for Aerospace Applications

2008 ◽  
Vol 59 ◽  
pp. 87-91 ◽  
Author(s):  
K. Mergia ◽  
Volker Liedtke ◽  
T. Speliotis ◽  
G. Apostolopoulos ◽  
S. Messoloras
Keyword(s):  
High Temperature ◽  
Composite Materials ◽  
Magnetron Sputtering ◽  
Mechanical Behaviour ◽  
Ceramic Composite ◽  
Protective Layer ◽  
Radiation Frequency ◽  
Aerospace Applications ◽  
Ceramic Composite Materials ◽  
Very High

The use of ceramic composite materials in aerospace applications requires the development of oxidization protection coatings which can withstand very high temperatures. HfO2 is a promising material as a high temperature oxidization protective layer. HfO2 coatings have been deposited by radiation frequency magnetron sputtering all over the surface of SiC substrates and were tested under re-entry conditions. Also their oxidization resistance in air in the temperature range 1100 to 1450°C has been examined. The coatings were found to be stable and well-adhering to the substrate even after 100 re-entry cycles. No oxidization of the underlying SiC structure is observed. Re-entry and oxidization tests result in the formation of HfSiO4 at the HfO2/SiC interface, which further promotes their oxidization resistance.

scholarly journals High-temperature heat-shielding, ceramic and ceramic-metal composite materials for new-generation aviation equipment

2020 ◽  
pp. 83-92
Author(s):  
Yu. A. Balinova ◽  
D. V. Graschenkov ◽  
A. A. Shavnev ◽  
V. G. Babashov ◽  
A. S. Chaynikova ◽  
...  
Keyword(s):  
High Temperature ◽  
Composite Materials ◽  
Ceramic Composite ◽  
Metal Composite ◽  
Structural Elements ◽  
Temperature Heat ◽  
Metal Ceramic ◽  
Ceramic Composite Materials ◽  
Heat Shielding ◽  
New Generation

This paper describes achievements of the All-Russian Scientific Research Institute of Aviation Materials in the field of creating high-temperature heat-shielding, ceramic and metal-ceramic composite materials. The advantages and prospects of applying the developed materials in the manufacturing of structural elements of aircraft and friction joints are discussed. The synthesis features and basic properties of metal-ceramic composite materials based on light alloys, refractory metal matrices, ceramic composite materials for use in heavily loaded structural elements of modern aircraft are presented. The main achievements in the field of heat-shielding materials based on refractory oxide fibres are presented, along with their properties and application in new-generation aircrafts.

scholarly journals STRUCTURAL FEATURES OF NANOPRISE GLASSES AFTER HIGH-TEMPERATURE SINTERING

2021 ◽  
Vol 7 (5(41)) ◽  
pp. 36-40
Author(s):  
Georgy Yurievich Shahgildyan
Keyword(s):  
High Temperature ◽  
Composite Materials ◽  
Porous Glass ◽  
Main Parameter ◽  
Optical Materials ◽  
Structural Features ◽  
Nanoporous Glass ◽  
Thermal Sintering

Nanoporous glass is a matrix for composite optical materials, in which, by impregnating various activators, it is possible to initiate the appearance of properties uncharacteristic of composite materials. In this case, the main parameter of the structure of nanoporous glass is porosity, which can be controlled by the method of hightemperature sintering. In this work, we have studied the effect of thermal sintering on the structure of porous glass.

Development of test tools to be used in high temperature shear tests of thin wall composite materials

2018 ◽  
Vol 15 (1) ◽  
pp. 145-155
Author(s):  
A. N. Mironikhin ◽  
D. S. Lisitsyn ◽  
K. V. Shangin
Keyword(s):  
Experimental Data ◽  
Composite Material ◽  
High Temperature ◽  
Composite Materials ◽  
Wide Temperature Range ◽  
Thin Wall ◽  
Calculation Methods ◽  
Shear Tests ◽  
General Outline ◽  
Temperature Shear

The paper outlines the results of the development of the test tools to be used in shear tests of thin-wall composite materials under high temperatures. The calculation methods and the configuration of the newly developed test tools are discussed. Drawings and the general outline of the test tools are shown. Analysis of the experimental data and the stress strain curves obtained for test samples of the thin-wall composite material are presented. With the newly developed test tools, it is possible to perform shear tests of test samples of thin-wall composite materials over a wide temperature range, namely, under RT to 2000 ºC and even higher temperatures.

Structure formation of Ti / Ti‒Al‒C layered ceramic materials obtained by the method of free SHS-compression

2019 ◽  
pp. 57-60
Author(s):  
O. A. Averichev ◽  
A. D. Prokopets ◽  
P. A. Stolin
Keyword(s):  
Surface Layer ◽  
Structure Formation ◽  
Experimental Studies ◽  
Titanium Substrate ◽  
Ceramic Materials ◽  
Structural Features ◽  
Max Phase ◽  
Temperature Shear ◽  
Combustion Processes ◽  
Layered Ceramic

The results of experimental studies of the phase and structure formation of a layered ceramic material based on the MAX-phase in the Ti / Ti-Al-C system obtained under the combination of combustion processes and high-temperature shear deformation (SHS compression) are presented. The structural features of the developed material and the nature of the interaction between the products of synthesis and the surface layer of the titanium substrate are studied. Ill. 4. Ref. 16.

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