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What is the difference between single crystal diamond tools, CVD diamond tools and PCD tools?

2021-08-18 18:28:26

Single crystal diamond tools are almost exclusively used for high-precision finishing, which can ensure extremely high dimensional accuracy. PCD and CVD diamond can be used in many of the same processing fields, and PCD is more suitable for rough machining and processing occasions that require high tool fracture toughness. CVD diamond is better at finishing, semi-finishing and continuous turning, and can process more precise workpieces.

   The differences between single crystal diamond tools, CVD diamond tools and PCD tools are as follows:

Performance

MCD Tools

CVD Tools

PCD Tools

Material structure

Diamond

Diamond

Co-containing adhesive

Abrasion resistance

Higher than PCD and diamond film

2-10 times higher than PCD

Varies with diamond particle size

Toughness

Bad

Good

Excellent

Chemical stability

High

High

Lower

Machinability

Bad

Bad

Excellent

Solderability

Bad

Bad

Excellent

Cutting edge quality

Excellent

Excellent

Good

Applicability

Super finishing

Finishing, semi-finishing, continuous cutting, wet cutting, dry cutting

Rough machining, finishing

PCD tools are most suitable for processing aluminum and other tough non-ferrous alloys (such as copper, brass, and bronze), as well as highly abrasive composite materials (such as graphite, carbon-carbon materials, carbon-added phenolic, glass fiber, and porous seals material).
Single crystal diamond tools are almost exclusively used for high-precision finishing, and their extremely thin cutting capabilities can ensure extremely high dimensional accuracy. PCD and CVD diamond can be used in many of the same machining areas, but PCD is more suitable for rough machining and machining situations that require high tool fracture toughness. CVD diamond is better at finishing, semi-finishing and continuous turning. This is because it has excellent wear resistance and high hardness, and can process more precise workpieces.

The difference between single crystal diamond and polycrystalline PCD:

(1)The condition of polycrystalline PCD and single crystal diamond under a metallurgical microscope, the lower left picture clearly shows that the edge of the blade will be jagged, while the right picture is smooth and smooth.

PCD under the microscope 100 times:

PCD

MCD under the microscope 100 times:

PCD

(2) Differences in processing:

 MCD

PCD tools are composed of many fine crystals, so when turning processing, the surface of the workpiece will also show traces caused by small crystal grains.

workpiece surface

MCD cutter can directly present the perfect state of the blade on the workpiece.


TAG:  single crystal diamond tools  CVD diamond tool


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