REFRACTORY AND CERAMIC MATERIALS

Powder Metallurgy and Metal Ceramics

, Volume 51, Issue 7, pp 429-436

First online:

Structure and properties of titanium–chromium diboride composites

  • V. P. KonovalAffiliated withFrantsevich Institute for Problems of Materials Science, National Academy of Sciences of Ukraine Email author 
  • , V. Zh. ShemetAffiliated withFrantsevich Institute for Problems of Materials Science, National Academy of Sciences of Ukraine
  • , B. GrushkoAffiliated withPeter Grünberg Institute, Forschungszentrum Jülich GmbH
  • , A. D. PanasyukAffiliated withFrantsevich Institute for Problems of Materials Science, National Academy of Sciences of Ukraine
  • , T. V. MosinaAffiliated withFrantsevich Institute for Problems of Materials Science, National Academy of Sciences of Ukraine
  • , V. I. SubbotinAffiliated withFrantsevich Institute for Problems of Materials Science, National Academy of Sciences of Ukraine

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Composites based on binary titanium–chromium diboride are produced by hot pressing. The influence of aluminum nitride additions on the composition, structure, and mechanical and tribotechnical properties of the materials is studied. It is shown that the introduction of up to 10 vol.% AlN into (Ti, Cr)B2 reduces porosity and improves mechanical and tribotechnical properties. The (Ti, Cr)B2–AlN composites were wetted by NiAl alloy and the interaction area was analyzed. The contact angles of wetting are close to zero in this system and terminal solid solutions form in the interaction area. This allowed (Ti, Cr)B2–AlN–NiAl metal ceramics to be obtained. The metal ceramics sintered in vacuum have fine structure consisting of (Ti, Cr)B2 and AlN grains and NiAl alloy.

Keywords

composites titanium–chromium diboride aluminum nitride wetting hardness strength structure