PCD and CVD diamonds are both important ultra-hard materials, but they differ fundamentally. PCD refers to a material, while CVD describes a manufacturing process. When we say "CVD diamond," we usually mean diamond produced through the CVD method.
Feature PCD CVD Diamond
Nature A composite material A manufacturing process; product is pure diamond
|
Feature |
PCD |
CVD Diamond |
|
Nature |
A composite material |
A manufacturing process; product is pure diamond |
|
Production |
Micron-sized diamond particles are sintered under high pressure (5–6 GPa) and high temperature (1300–1600°C) with a metal binder to form solid blocks |
Carbon-containing gases (e.g., methane) are decomposed under high temperature (≥1800°C) and low pressure, depositing pure diamond on a substrate |
|
Form |
Solid blocks or discs (millimeter thickness), usually brazed to tool holders |
Thin films (a few to tens of microns), or standalone thick films/substrates |
|
Composition |
Diamond particles + metal binder (e.g., cobalt, silicon) |
Pure diamond without metal binders |
|
Key Properties |
High toughness, impact-resistant; absorbs shocks well; hardness lower than CVD; thermal conductivity ~560 W/m·K |
Extremely hard and wear-resistant (hardness >9000 HV); tool life 1.5–10× longer than PCD; high thermal conductivity (1000–2000 W/m·K); chemically inert, low friction; brittle with poor impact resistance |
|
Processing & Applications |
Easier to machine using EDM, laser, or ultrasonic methods; widely used for wire-drawing dies, milling cutters, and drills |
Harder to machine, requiring laser engraving or long diamond grinding; ideal for high-precision, continuous cutting tools; suitable for graphite, ceramics, high-silicon aluminum alloys (>12% Si), SiC, and other hard-brittle non-metals |
How Are PCD Materials Processed with Lasers?
Core Mechanism: High-energy-density laser beams rapidly melt or vaporize the material, enabling cutting, drilling, or engraving. Different lasers vary in how they manage heat-affected zones:
Fiber/QCW Lasers: Typical cut width ~0.2 mm, heat-affected zone ~0.1 mm. Moderate cost, high efficiency (QCW fiber lasers can cut at 12–15 mm/s), suitable for various PCD machining tasks.
YCLaser's precision laser equipment is used for cutting and drilling materials such as alumina, zirconia, aluminum nitride, silicon nitride, PCD diamond, and polycrystalline silicon.
We offer material processing services and encourage interested customers to send samples for testing. Welcome to contact
