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Single-Phase Structural Materials

#G-1104


Synthesis of Ti-Al Single-Phase Materials

Tech Area / Field

  • MAT-ALL/High Performance Metals and Alloys/Materials
  • MAT-SYN/Materials Synthesis and Processing/Materials

Status
3 Approved without Funding

Registration date
19.11.2003

Leading Institute
Institute of Metallurgy, Georgia, Tbilisi

Collaborators

  • Georgia Institute of Technology / School of Materials Science and Engineering, USA, GA, Atlanta\nSouth Dakota School of Mines and Technology / College of Material Science and Engineering, USA, SD, Rapid City\nColorado School of Mines, USA, CO, Golden

Project summary

The aims and objectives of the project are the design of new structural materials with the improved structure and quality, based on the Ti-Al system which is an important R&D area in contemporary materials science. The single-phase intermetallic alloys of Titanium-Aluminum system are potentially new, light-weight/high-temperature, structural materials for aerospace applications, e.g. hypersonic vehicles and next generation aircraft and rocket engines.

These Ti-Al intermetallic materials can operate at high working temperatures, have a low density, high corrosive resistance in comparison with other materials. Wide use of materials based on Ti-Al is limited because of the complicated processing technology, brittleness at 700-800 °C and low cracking resistance. The above features of these alloys are caused by the existence of different, well-known secondary phases. Obtaining of such Ti-Al single-phase material, using the existing technologies, is not possible. One of the ways, and may be the only way, for solving this above problem is to apply the unique process of Self-Propagating High-Temperature Synthesis (SHS).

The second important aim of this project, therefore, is development and application of SHS, an advanced synthesis and processing technology, as a new means of producing these important intermetallic materials. The SHS technology is characterized with high productivity, simple equipment, minimum energy consumption, coupled with the possibility of simultaneous fabrication of the material and the components made from these intermetallic materials with the desired properties working at high temperatures, and is environmentally safe.

The scientific merit of the proposed project is focused on the possibility of obtaining single-phase materials of Ti-Al, that will be free from the deficiencies which are characteristic for such materials obtained by conventional methods (such as shortness and low crack resistance, etc).

The technical merit of the development includes the design of a special, environmentally safe and energy-efficient installation, that is capable to conduct SHS of mixtures with low exothermicity, which are typically difficult to complete in the SHS mode of synthesis, and simultaneously fabricate components with the specified shape.

Validity of the expected results is provided by the experience and knowledge of the Georgian scientific team participating in this project. This knowledge is accumulated by the participation of the team members in several defense and space programs, conducting fundamental and applied research in the field of combustion of heterogeneous solid systems.

In addition it should be noted that most of the participants have taken part in fundamental research projects including state projects implemented in the former USSR, such as “Space Physics of Metals” program.


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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.

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