Lesson 8 – Diamond Slurry Types (Mono-, Poly-, and Natural)
What You Will Learn
- Contrast monocrystalline vs. polycrystalline diamond behaviors
- Explain the self‑sharpening mechanism in bonded tools with mono
- Describe polycrystalline toughness and high‑pressure compatibility
- Explain where natural diamond excels (cleanliness, plated tools)
- Choose diamond type by process pressure and cleanliness demands
Monocrystalline Diamond
Monocrystalline (synthetic) diamond fractures along cleavage planes, which can act as a self‑sharpening mechanism in bonded tools. Commonly used in lapping and polishing applications, with minor differences compared to natural diamond in many loose‑abrasive contexts.
Polycrystalline Diamond
Polycrystalline diamond comprises countless micro‑crystallites (~20 nm) without cleavage planes, yielding tougher particles. This allows higher process pressures and increased material removal in lapping applications.
Natural Diamond
Natural diamond is precision‑graded, blocky, and sharp‑edged, and is free of catalyst metals—preferred in plated tools and cleanliness‑critical applications. Also used where maximum cleanliness and specific particle morphology are required.