Structure and properties of titanium–chromium diboride composites
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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.