New Structural and Composite Alloys of Ti-Al System Produced by the Method of Self-Propagating High-Temperature Synthesis for Engineering Applications
Tech Area / Field
- MAT-ALL/High Performance Metals and Alloys/Materials
- MAT-SYN/Materials Synthesis and Processing/Materials
3 Approved without Funding
Institute of Metallurgy, Georgia, Tbilisi
- Institute of Chemical Physics, Armenia, Yerevan
- Colorado School of Mines, USA, CO, Golden\nGeorgia Institute of Technology / School of Materials Science and Engineering, USA, GA, Atlanta\nUniversity of Patras / School of Engineering, Greece, Patras
Project summaryThe aims and objectives of the project are designing of a new structural and composite materials with the improved structure and quality on the basis of Ti-Al that is an important problem of the modern materials science. One of the prospective structural materials for the engines of a new generation, used in airchaft and space technologies, are the single-phase intermetallic alloys of Titanium-Aliminium.
Actuality of this problem is that the structural and composite materials on the basis of Ti-Al are the materials for working at high temperatures, have a low density, high corrosive resistance in comprasion with other materials on the basis of titanium, comparitevely high strength at 800–900 °C temperatures, and components of these materials are not deficient.
Wide use of the materials on the basis of Ti-Al is limited because of the complicated technology, brittleness at 700–800 °C and low cracking resistance. The above features of this alloys are caused by the existence of different phases. Obtaining of a single-phase compounds of Ti-Al alloy, by the existing technologies, is not possible.
One of the ways for solving the above problem is to apply the unique process of Self-Propagating High-Temperature Synthesis (SHS).
Therefore, the second and considerable aim of the project is the development of an advanced technology of the Self-Propagating High-Temperature Synthesis. The SHS technology is characterized with the high productivity, simple equipment, minimum energy consumption and possibility to obtain the materials and wares with the desired properties.
New and specific peculiarity of the project will be that the applying of SHS-technology to the materials and wares from Ti-Al system, gives a possibility of alloying of materials with TiC, SiC and other carbides. When it is necessary, to increase the strength, there is a possibility of reinforcement with the carbide fibers.
Scientific merit of the proposed project is focused on the possibility to obtain a single-phase materials of Ti-Al system, that will be free from that deficiency which are characteristic for such materials obtained by conventional methods (such as shortness, low crack resistance). Composition of carbides of transition metals with the intermetallic compounds will allow us to apply materials for works at high temperature with the improved performance.
Technical merit of the development includes a designing of a special, environmentally safe, installation producing low-exothermal SHS mixtures with the minimum energy consumption.
Validity of the expected results is provided by the experiences and knowledge of Georgian and Armenian scientific teams, participating in this project. The knowledge is accumulated by participation in several defence projects, conducting fundamental and applied research in the field of combustion of Heterogenious solid systems.
In addition it can be noted that most of the participants have taken part in fundamental research projects included in state project, implemented in the former USSR, “Space Physics of Metals”.
The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.
ISTC facilitates international science projects and assists the global scientific and business community to source and engage with CIS and Georgian institutes that develop or possess an excellence of scientific know-how.