Diamond vs CBN vs B4C: Material Selection and Performance Boundaries
SinoDiam – Industrial Diamond Micron For Consistent Quality and Repeatable Output.
Industrial powders such as diamond, CBN (cubic boron nitride), and B4C (boron carbide) differ significantly in hardness, thermal stability, and cutting behavior. Selecting the appropriate material ensures optimal removal rate, surface finish, and process stability. Diamond is preferred for hardest materials like sapphire and optical glass. CBN excels in ferrous metals, while B4C is suitable for specific ceramics.
Comparison Table
| Material | Hardness | Best Use Cases | Notes |
|---|---|---|---|
| Diamond | 10 Mohs | Optical glass, sapphire, ceramics | High removal rate, minimal subsurface damage |
| CBN | 9 Mohs | Ferrous metals, precision grinding | Thermal stable, wear resistant |
| B4C | 8 Mohs | Ceramic composites | Cost-effective, moderate precision |
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