| Composition | Bulk density | Theoretical density+ | Relative density | ||
| ZrC (vol%) | ZrB2 (vol%) | C (vol%) | Dobs (Mg·m−3) | Dx (Mg·m−3) | Dr (%) |
| 30* (24.97)# | 70* (58.27)# | -* (16.76)# | 5.40 | 5.592 | 96.6 |
| 40* (34.11)# | 60* (51.17)# | -* (14.72)# | 5.60 | 5.719 | 97.9 |
| 50* (43.71)# | 50* (43.71)# | -* (12.57)# | 5.75 | 5.853 | 98.2 |
| 60* (53.81)# | 40* (35.87)# | -* (10.32)# | 5.96 | 6.041 | 98.7 |
| 70* (64.44)# | 30* (27.62)# | -* (7.94)# | 6.03 | 6.140 | 98.2 |