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New Titanium Carbide Materials

#G-961


Elaboration of New Low-Tungsten and Tungsten-Free Nanocrystalline Hard Alloys Based on Titanium Carbide

Tech Area / Field

  • MAT-COM/Composites/Materials
  • CHE-SYN/Basic and Synthetic Chemistry/Chemistry
  • PHY-SSP/Solid State Physics/Physics

Status
8 Project completed

Registration date
10.12.2002

Completion date
04.02.2009

Senior Project Manager
Lapidus O V

Leading Institute
Georgian Technical University, Georgia, Tbilisi

Collaborators

  • University of Bath / Department of Chemistry, UK, Bath\nStockholm University, Sweden, Stockholm

Project summary

Objective of the project is elaboration of a technology for the fabrication of nanocrystalline hard metals based on titanium carbides assigned for the fabrication of articles with wear-resistant, high temperature strength and refractory properties: (e.g. skins of space rockets, jet engine nozzles, combustion engines, radiation resistant first walls of nuclear reactors, metal-working tools, production tools, chemical industry catalysts), elaboration of original installations for research of hard metals, issue of recommendations for industrial designs, pilot production of samples and their industrial testing.

Another objective is elaboration of measures for prevention of terroristic attacks, in particular: water-jet cutting nozzle for the neutralization of explosive assembly through their nonexplosive destruction, armor jacket plates and machine armors.

Novelty of the project:

– New hard metal composition with specific structure;


– New technology for the fabrication of nanocrystalline titanium carbide as well as metal-ceramic hard alloys based on the above material; original installations for research studies.
– Security aids for the defense from terroristic attacks.

New technology is based on realization of the methods elaborated by our group. Those are: the first method - preparation of the solutions of titanium metal-organic or complex compounds mixed with the salt solutions of bonding metals (Ni, Mo, W, Nb, Fe), in compliance with composition of the developing hard metals under development. After drying and subsequent pyrolysis in hydrogen flow there occurs selective carbidization and reduction of bonding material: the resulting product is a hard alloy charge where all components are in nanocrystalline (of an order of 200-300 nm) state; the second method – formation of metal-organic or complex compounds upon melting of the salts of the components of the alloy and organic material. After pyrolysis of the melt there are formed evenly distributed nanocrystalline particles of titanium carbide and those of bonding metals; the third method - formation of nanocrystalline hard metal charge as a result of high temperature (~ 900 °C) chemical interaction of titanium hydride and bonding metal salts with hydrocarbon compounds. All the above mentioned methods ensure integrity of nanocrystalline structure in the pieces shaped and sintered by traditional methods.

Armor jackets of the elaborated materials will be stronger and 2-2.5 as light as those made of standard hard metal materials.

Water-jet cutting nozzle of special construction made of the elaborated materials may successfully be used for the neutralization of bombs by destruction of the corps and the explosives of bombs.

Scientific and practical value of the project:

Will be elaborated compositions of new nanocrystalline metal-ceramic hard alloys based on titanium carbide with a specific structure (inaccessible to be formed by traditional methods), where high physical and chemical properties are successfully combined with mechanical properties.

– An area of application will be widened and resource of hard metal pieces increased; in particular, an opportunity to create a new generation of armored materials, metal-working tools, articles for the application in space rockets, nuclear reactors, etc. will occur.

– Original installations for research studies will be designed. Technological process for the manufacturing of the pieces will be developed; pilot production of the specimens and their industrial testing will be realized.

– Security aids for the defense from terroristic attacks will be elaborated.

The goals will be achieved on the ground of scientific elaborations, experience and an equipment installed at the Technical University of Georgia as applied for creating composite materials, in particular hard alloys and the instruments for their testing.

Support of the project will be of a great social economic significance for Georgia. First, scientific potential of a group of leading scientists who were basically involved in Defense Institutions of the USSR, will be directed to the creation of peaceful production at minimal financial expenditure necessary for the solution of such kind of problems. Secondly, realization of the project will further progress in the field of science and economy of the country out of the development of a new scientific-technical direction and industry of the product competitive at the world market. Performance of struggle against international terrorism will be increased.


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