Features of diamond grinding and polishing fluid

There are four basic elements in the grinding and polishing process: workpiece, grinding fluid, grinding/polishing disc, and grinding conditions. Diamond grinding/polishing fluid is a liquid polishing material that has developed rapidly with the development of my country's electronics industry. It is mainly used in automatic grinding and polishing machines for processing ceramic materials, silicon wafers, cemented carbide, etc.

Diamond liquid grinding/polishing fluids basically come in three forms: water-based, oil-based, and emulsion. Water-based diamond grinding fluids are widely used in automatic grinding/polishing machines due to their ease of cleaning, low contamination, and convenient use. Generally, diamond grinding fluids use two types of diamond micron powder: polycrystalline diamond (PCD) and monocrystalline diamond micron powder. The diamond particle size is 0.25–40 μm, with commonly used specifications being 1–6 μm. Different particle sizes of diamond micron powder are added to prepare diamond grinding fluids of different specifications. Customers can select different particle sizes of diamond micron powder solutions according to the material and process of the workpiece being polished and the desired performance values. Depending on the selected diamond powder particle size, the diamond solution performs either grinding or polishing functions.

Polycrystalline Diamond Polishing Fluid:

Utilizing the properties of polycrystalline diamond, this slurry maintains high cutting efficiency while minimizing scratches on the workpiece during grinding and polishing. It is primarily used for grinding and polishing sapphire substrates, optical crystals, hard glass and crystals, superhard ceramics and alloys, magnetic heads, hard drives, and chips.

Single-Crystal Diamond Polishing Fluid:

Single-crystal diamond possesses excellent cutting power and relatively low processing costs. It is widely used in the grinding and polishing of superhard materials.

Nanodiamond Polishing Fluid:

The spherical shape and fine particle size of nanodiamond powder achieve ultra-precision polishing results and exhibit excellent dispersion stability, remaining stable for extended periods without settling or agglomeration. It is widely used in the ultra-precision polishing process of hard materials, achieving surface roughness below 0.2 nm.

The use of diamond polishing slurries falls under the category of grinding and polishing processes. It is a finishing method that utilizes free abrasive particles to remove surface imperfections to achieve the desired processing effect. From the perspective of material removal mechanisms, grinding is a method that lies between the destruction of brittle materials and elastic removal, while polishing is basically carried out within the range of elastic removal of materials.