More recently a rather simple compound of the element, rhenium diboride, has attracted some attention because it is one of the hardest of all known substances. Unlike other super-hard materials ...

"We used the examples of rhenium diboride (ReB 2) and boron carbide (B 4 C) to demonstrate that the hardness model works for hard and superhard materials. The hardness obtained is consistent with ...

“We used the examples of rhenium diboride (ReB2) and boron carbide (B4C) to demonstrate that the hardness model works for hard and superhard materials. The hardness obtained is consistent with ...