CVD Diamonds are the ones that are synthetically produced through machines and used in many technical applications. These diamonds have a variety of use and are widely used in many niche markets. There are service providers who make or build these CVD Diamonds for various uses. The diamonds are utilized in the creation of optical, thermal, and modern technology. The diamond coating process consists of a matrix of poly and nano-crystalline diamond. It is grown on the surface of cutting tools in a vacuum coating process. It also increases the tool life and performance significantly in highly abrasive machining applications.
Here are the Advantages of CVD Diamond Coating–
1.The varied crystal structures provide strong protection against abrasive and adhesive wear. The cutting-edge provides protection against mechanical shock.
2.The tool geometry is protected by the presence of pure diamond. It helps the designing of complex tools for specific applications.
3.The CVD Diamonds are manufactured in a cost-effective manner compared to real diamonds.
4.These Synthetic Diamonds are used for more resources and it is also easily accessible.
5.The diamond used on tools will have the highest degree of hardness and fracture toughness with the lowest coefficient of friction. It enables a longer tool life.
6.The diamond coated surfaces will produce the best finishes on machined parts.
7.The synthetic diamonds are considered as the hardest diamonds which have the highest thermal connectivity.
A hot Filament Chemical Vapor Deposition (HFCVD) reactor is used for diamond deposition with the use of a modified filament arrangement. The filament is mounted vertically with the drill held concentrically in between the filament coils, as opposed to the commonly used horizontal arrangement. It is a simple and inexpensive filament arrangement. The films are examined in terms of their growth rate, morphology, adhesion and cutting efficiency. Diamond coatings are grown atom by atom on the tool surface. Commercially various technologies are used to produce CVD Diamond tools.
CVD Diamond Tools and Tooling-
The CVD Diamond tooling applications are those where machining the material forms powder or small grit. Graphite or fiberglass are the perfect examples of diamond tooling and the primary operation at the cutting edge is basically abrasive wear rather than chip formation. The CVD diamond coating will last from 50 to 70 times longer than standard carbide. The diamond coating process is dependent on the selection of proper tool material. A CVD diamond film is pure diamond and is made with a process called chemical vapor deposition. Diamond is composed of carbon atoms and when heated will absorb carbon to form carbides in the workpiece.
The life of a diamond-coated tool varies depending on the material being cut, the chosen feeds and speeds, and the geometry of the part. The machining function, the material, and the goals of the operations all must be considered on a case by case basis in order to provide a top performing CVD coated cutting tool. The quality of the tool grind is paramount to ensuring the strength of the tool’s cutting edge.
