Some Properties of Sintered CrB

Abstract

The sample of CrB arc-melted in an argon atmosphere in a water coold copper crucible was pure than that obtained by sintering a mixture of Cr₂O₃, boron and carbon black powders. The former was subjected to the following studies. It was ground, pressed and sintered to form test specimens. The optimum sintering temperature is ca. 1600-1700°. The resistance to oxidation at 1100° and corrosion against HNO₃, HCl and H₂SO₄ is rather bad except in the case of HNO₃. The ability of wetting CrB is shown to be best in Ni and to go worse in the order Fe-Cr-Co-Cu-Ag. Ag scarcely wets CrB. The reaction zones were examined by metallographic method and hardness test.