The ternary chromium - Rhenium - Boron system

Conclusions

• 1. The Cr-Re-B system was studied by methods of x-ray structural and microstructural analyses and the isothermal section at 1400°C was constructed.

• 2. The solubility of the third component in the binary borides of chromium and rhenium is marked only for the lower borides up to 50 at.% Re in Cr₂B and about 10 at.% Cr in Re₃B).

• 3. At a composition of Cr₃Re₂B₅, there exists a ternary compound possessing a rhombic structure of the FeB type (a= 5.698–5.749±0.005, b=2.959–2.973±0.003, c=4.261–4.297±0.003 Å).

• 4. In the unheat-treated samples, a ternary compound CrRe₃B_4−x was observed with a tetragonal structure of theα-MoB type (a=2.997±0.002, c=16.515±0.01 Å).