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Home Material Sciences Ceramic Nanocomposites

Ceramic Nanocomposites

Description

Ceramic nanocomposites which have a high melting temperature, hardness, chemical and thermal stability applicable for cutting tools, extrafine finishing of metallic parts, wear resistive components, radiators for electronics, radiation resistive ceramic components. SiC-C based nanocomposites are nanocrystalline (40-120 nm) beta-silicon carbide reinforced with diamond planar clusters built-in the lattice of SiC with the following properties:

  • hardness around 40 GPa in pure poreless form and 24 GPa in nanocompostes with alumina;
  • fracture toughness around 9 MPa m1/2.

An equipped pilot shop for production of SiC-C nanopowder is available. Developed materials were tested by Baker Hughes INTEQ GmbH. Si3N4-TiN-TiB2 based nanocomposites are nano-TiN reinforced with nano-TiB2 and Si3N4 particles with the following properties:

  • hardness around 20 GPs;
  • fracture toughness of up to 8.5 MPa m1/2;
  • maintain high stability (grain size around 80 nm) of up to 8000 C.

Developed materials were tested by the ALCON Concern, Ukraine.


Fig. 1HRTEM of the SiC-C solid solution

Contact Details

Andrey V. Ragulya, Dr. Prof. Vice-director of IPMS
Frantsevich Institute for Problems of Materials Science of NASU
3, Krzhizhanovski str., Kyiv
Tel.(including code) +38-044-424-7435
Fax (including code) +38-044-424-2131
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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