Multifunctional Composites in the B4C-ZrB2-TiB2 System for Armor Plates, Turbine Blades and Blades, High-Temperature and Wear-Resistant for Nodes | Chapter 3 | Chemical and Materials Sciences: Developments and Innovations Vol. 8

Resume: Goal -. The task was to study the phase composition of received consolidated materials in the TiC-TiB₂-ZrB₂ system. The powders were pressed by hot pressing method in a vacuum 10^-3Pa at 2150˚C - 2200˚C temperature and 20 - 25 MPa pressure, pressing duration at final temperature was 5 - 8 min. Experimental works have been conducted the objective of which was to improve mechanical properties of boron carbide by introduction of doping elements into the system. Titanium and Zirconium were selected as doping elements, which were introduced into the system in the form of TiB₂ and ZrB₂. Four types of boron carbide-titanium and zirconium mixtures with various titanium and zirconium diboride content were used in experiments. Optimal process parameters, as well as doping elements concentration, necessary to provide the required high mechanical parameters in the composite were defined.

Methods: To study the phase composition of the composites, an X-ray structural analysis was conducted on the DRON-3 device. To study the microstructure, research was conducted on an optical microscope -AC100 and a raster electron microscope “Nanolab 7” of the company "OPTON”.

Results: In the B₄C-TiB₂ and B₄C-ZrB₂ systems, nanocomposites with high mechanical properties were obtained. The advantage of this method is that compounds, which are newly formed thanks to interaction going on at thermal treatment: TiB₂ and ZrB₂ are active, which contributes to B₄C-TiB₂ and B₄C-ZrB₂ formation at temperature, 21500C. It is evident that inculcation of TiB₂ in the crystal skeleton of B₄C is easier since at this temperature interval crystal skeleton of B₄C TiB₂ and B₄C-ZrB₂ is still in the process of formation.

Conclusion: The phase composition of the obtained composite provides high physical-technical and performance properties of these composites. Compression strength-2182 MPa, Bending strength-298 MPa, Thermal expansion coefficient a_20-700-3.6 10^{-6 0}C.

Author (s) Details

 

Z. D. Kovziridze
Institute of Bionanoceramic and Nanocomposite Technology, Georgian Technical University, 0175 Tbilisi, Str. Kostava 77, Georgia.

 

Z. Mestvirishvili
Institute of Bionanoceramic and Nanocomposite Technology, Georgian Technical University, 0175 Tbilisi, Str. Kostava 77, Georgia.

 

G. Tabatadze
Institute of Bionanoceramic and Nanocomposite Technology, Georgian Technical University, 0175 Tbilisi, Str. Kostava 77, Georgia.

 

N. S. Nizharadze
Institute of Bionanoceramic and Nanocomposite Technology, Georgian Technical University, 0175 Tbilisi, Str. Kostava 77, Georgia.

M. Mshvildadze
Institute of Bionanoceramic and Nanocomposite Technology, Georgian Technical University, 0175 Tbilisi, Str. Kostava 77, Georgia.

M. Balakhashvili
Institute of Bionanoceramic and Nanocomposite Technology, Georgian Technical University, 0175 Tbilisi, Str. Kostava 77, Georgia.

 

E. Nikoleishvili
Institute of Bionanoceramic and Nanocomposite Technology, Georgian Technical University, 0175 Tbilisi, Str. Kostava 77, Georgia.

 

Please see the book here:- https://doi.org/10.9734/bpi/cmsdi/v8/2951

Emphasizing the Effects of Tool Geometry on Surface Modification of Aluminium 6063 by Friction Stir Processing | Chapter 3 | Recent Developments in Engineering Research Vol. 7

 In special machine elements, architectural sections, automobiles and frame systems, aluminium alloy 6063 has a wide application. AA6063 has a high strength to weight ratio, but poor wear resistance and hardness characteristics. Friction Stir Processing (FSP) is a method of surface modification in which the surface's mechanical properties can be enhanced by strengthening ceramic particles. The surface property of Aluminium Alloy 6063 is modified in this present investigation by strengthening the powder particles of Boron Carbide (B4C) through FSP. The distribution of B4C particles was investigated by keeping the volume fraction (22.38 percent) constant for various reinforcement techniques, based on hardness and impact power. The tool pin profiles such as the threaded cylindrical and square pin were also compared via various reinforcement techniques for the best distribution of B4C in the base metal surface. The tool has a rotational speed of 1200 rpm, a travel speed of 40 mm / min and an axial force of 10 kN. By strengthening Boron carbide particles into the base metal surface, friction stir processing is an efficient way to increase hardness. When the B4C particles are packed into the serial holes and friction stir is processed with the square pin profile tool, the optimum hardness and impact strength is achieved. The uniform distribution of B4C particles is demonstrated by increased hardness in the Stir field. For surface modification via FSP, the serial holes reinforcement method with a square pin instrument may therefore be used.

Author(s) Details

Dr. G. Rajamurugan
School of Mechanical Engineering, Vellore Institute of Technology, Vellore, India.

D. Amirtharaj

Department of Mechanical Engineering, Bannari Amman Institute of Technology, Erode, India.

S. Sivachidambaram

Department of Mechanical Engineering, Bannari Amman Institute of Technology, Erode, India.

D. Dinesh

Department of Mechanical Engineering, Bannari Amman Institute of Technology, Erode, India.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/299

Emphasizing the Effects of Tool Geometry on Surface Modification of Aluminium 6063 by Friction Stir Processing | Chapter 3 | Recent Developments in Engineering Research Vol. 7

 

In special machine elements, architectural sections, automobiles and frame systems, aluminium alloy 6063 has a wide application. AA6063 has a high strength to weight ratio, but poor wear resistance and hardness characteristics. Friction Stir Processing (FSP) is a method of surface modification in which the surface's mechanical properties can be enhanced by strengthening ceramic particles. The surface property of Aluminium Alloy 6063 is modified in this present investigation by strengthening the powder particles of Boron Carbide (B4C) through FSP. The distribution of B4C particles was investigated by keeping the volume fraction (22.38 percent) constant for various reinforcement techniques, based on hardness and impact power. The tool pin profiles such as the threaded cylindrical and square pin were also compared via various reinforcement techniques for the best distribution of B4C in the base metal surface. The instrument
1200 rpm of rotational speed, 40 mm / min of travel speed and 10 kN of axial force are kept constant. By reinforcing Boron carbide particles into the base metal surface, friction stir processing is an efficient way to increase hardness. When the B4C particles are packed into the serial holes and friction stir is processed with the square pin profile tool, the optimum hardness and impact strength is achieved. The uniform distribution of B4C particles is demonstrated by increased hardness in the Stir field. For surface modification via FSP, the serial holes reinforcement method with a square pin instrument may therefore be used.

Author(s) Details

Dr. G. Rajamurugan
School of Mechanical Engineering, Vellore Institute of Technology, Vellore, India.

G. Rajamurugan
School of Mechanical Engineering, Vellore Institute of Technology, Vellore, India.A. Abijith


S. Sivachidambaram
Department of Mechanical Engineering, Bannari Amman Institute of Technology, Erode, India.

D. Dinesh
Department of Mechanical Engineering, Bannari Amman Institute of Technology, Erode, India.


View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/299