"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 ...

Over time, advancements in tungsten carbide grain sizes have significantly influenced the hard metal industry. In the mid-1920s, grain sizes ranged from 2.0 to 5.0 µm. Today, the spectrum has widened ...