CVD diamond plate

What is the CVD diamond

CVD synthetic diamond is an acronym for chemical vapor deposition diamond, pure diamond polycrystalline structure, no cutting surface, no metal binder. More SuperHard offers a full range of CVD diamond grinding, cutting, dressing, coating, thermal and wear part solution and service

Applications of CVD diamond

CVD diamond plate is used for semi-finishing, finishing, super finishing and continuous cutting of ultra precision cutting tools. In addition, the CVD diamond is also used for other high-tech applications (such as diamond dresser, wire drawing die, electronics, optical window, heat spreader and gem stone industry, etc).

CVD diamond

( Imaging of CVD optical Windows under the microscope )

The specification of CVD diamond plates

Model	*length width * thickness (mm)**
CVD diamond plate	1 * 1 * 1
	2 * 2 * 1
	3 * 3 * 1
	4 * 4 * 1
	5 * 5 * 1
	6 * 6 * 1
	7 * 7 * 1
	8 * 8 * 1
	9 * 9 * 1
	10 * 10 * 1
	11* 11 * 1
	12 * 12 * 1
Thickness of CVD diamond plate from 0.3mm to 3mm Other sizes of cvd diamond plates can be made according to customer's requirement

Single Crystal orientation

2pt(110): top and bottom 110+2 sides 110+2 sides 100

4pt(100): top and bottom 100+4 sides 110

single crystal

How many types of cvd diamond plates

1. CVD diamond plates for cutting tools

cvd diamond plates cvd diamond cutting tools

Benefits of cvd diamond plates for cutting tools

- Because the concentration of atomic hydrogen produced by arc discharge is relatively high, the CVD tool blank processed by the DC arc plasma jet also has a higher thermal conductivity than the tool blank processed by other methods even at higher grown rate. This shows that CVD is obviously beneficial to heavy high-speed cutting operations.

- The CVD diamond tool is made with CVD diamond blanks without any binder, sharing the same surface smooth finish as the natural single crystal diamond.

- The working life of CVD diamond cutting tools are 100 times higher than that of hard alloy.

Applications of cvd plates: non ferrous materials, ceramic, abrasive composites, high silicon - content aluminum alloy, graphite and other difficult machining materials.

2. CVD diamond for optical windows

cvd diamond for optical windows

The high-quality CVD diamond has excellent optical performance, it has high optical transparency in х -RAY, UV, visible lightinfrared light, even up to the millimeter-wave.

Excellent transparency in the optical, high thermal conductivity, extraordinary high hardness and high fracture toughness, and very low thermal expansion coefficient make cvd diamond an ideal material for highly demanding optical window the broad band optical transparency

Applications of cvd diamond plates: for optical windows. Such as high power laser windows, high power micromave windows and durable windows, etc

The properties of optical grade CVD diamond

Transmission	225nm To Far Ir 70% @10μm
Refractive Index	2.38 @ 10μm, 2.41@500 Nm
Absorption Coefficien	<=0.10 Cm^-1 @10 Μm
Bandgap	5.45ev
Double Side Surface Roughness	Ra 10nm
Flatness	4um/Cm
Thickness <= 0.3mm Diameter<= 20mm

3. CVD diamond blanks for dressing tool

cvd dianond plates for dressing tool

Chemical vapor deposition(CVD) for dressing tools is made by laser cutting CVD diamond thin-film. CVD diamond blanks are suitable for various dresser tools,

- Single - point cvd dresser

- Multi - point cvd dresser,

- CVD rotary dresser,

- CVD diamond dressing roller

CVD diamond blanks produced by the high quality semitransparent polycrystalline diamond, with no binder phase, have excellent thermal stability and high thermal conductivity.

The cvd diamond grade includes (standard grade and high quality grade)

Performance	Standard	High Quality
Vicker Hardness	8000 Kg/Mm^2	10000 Kg/Mm^2
Density	3.51g/Cm^3	3.51g/Cm^3
Young’s Modulus	1000 Gpa	1100 Gpa
Thermal Conductivity	1000w/M.K	1500w/M.K
Chemical Stability	Insoluble In All Of Acid And Alkali
Break Strength	350 Mpa	550 Mpa
Wear Ratio	200000	400000
Thermal Stability	800°C	800°C

4. CVD diamond wire drawing die blank

CVD diamond wire drawing die blank

Wire drawing is a metal-working process relies on a combination of a die and/or a series of dies to pull or draw a wire to a chosen gauge and is utilized to reduce the cross section of a wire.

CVD diamond consist of a metal case and a nib made from monocrystalline diamond or polycrystallie diamond (PCD) or CVD diamond.

Applications of cvd diamond : wire drawing of stainless steel, tungsten, molybdenum, copper, aluminum and others alloy, etc

Size of CVD diamond die blanks

Product	Size (mm)		Shape
CVD Serie	D	T	D----the diameter T-----the thickness
CVDD2010	2.0	1.0
CVDD2512	2.5	1.2
CVDD3015	3.0	1.5
CVDD4020	4.0	2.0
CVDH4020	4.0	2.0

5. CVD Diamond for thermal management / CVD diamond heat sinks (CVDK)

cvd diamond cvd diamond for thermal

CVD diamond has very good insulation performance, which makes it an ideal material for making electronic cooling devices. Our CVD diamond can reach 1200- 2000W/m.k, and we can do one side polish finish or both sides polish finish according to your request.

Applications of cvd diamond blanks: High power electronic and optoelectronic devices. Such as high power integrated circuits, microwave diodes and laser diodes, etc

Advantages of CVD diamond plates

- High transmission, good thermal stability and chemical stability. CVD diamond is the best replacement of natural diamond.

- CVD diamond has low surface roughness and good cutting edge compared to PCD tools.

- CVD diamond has higher wear resistance than PCD and other diamond materials.

- The thermal conductivity of CVD diamond is 50% higher than PCD.

- Good hardness and long life exceed HPHT and natural diamond.

The case of CVD diamond plates

An Australian professor: The nitrogen content is 100ppm HPHT, which is higher than other customers require. He feels that high nitrogen content HPHT can be achieved, high CVD purity and low nitrogen content, size 2X2X2 thickness

Moresuperhard: In fact, HPHT cannot reach this thickness, and CVD is finally recommended.

Professor Australia: The CVD growth rate is a few microns per hour, which means that this 2 mm thick sample needs 27 days to grow,

Moresuperhard: CDV technology is mature, and the growth cycle can be about one week. If the nitrogen content is high, the growth rate will be accelerated.

CVD parameters

Crystal phase 111: It is grown on the 110 crystal seed, and then cut according to the 111 crystal phase

Polishing: 6 sides can be polished, generally the upper and lower sides can be polished. After 6 sides are polished, it is difficult to find 111, 111 is the upper and lower + 2 sides 111, the other 2 sides 110

Color: Nitrogen content 100ppm, somewhat similar to coffee color

Size: 3.5 * 1.5 * 1, 100ppm

Cutting

CVD (Chemical Vapor Deposition) Diamond Plates

Grinding wheel for carbide punch

Grinding Case-SG grinding wheel for 20CrMnTiH workpieces

Grinding wheel for carbide punch

Grinding Case-SG grinding wheel for 20CrMnTiH workpieces