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Loughborough Abrasive Materials
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Further Information on Abrasive Materials
An abrasive is a material, often a mineral, that is used to shape, finish or cut a workpiece or object through rubbing which leads to part of the workpiece being worn away. Finishing a material often means polishing it to gain a smooth, reflective surface where the fine scratch marks are literally abraded off. It can also involve roughening as in satin, matte or beaded finishes.
Abrasives nowadays are extremely commonplace and are used in a wide variety of industrial, domestic, and technological applications. This gives rise to a large variation in the physical and chemical composition of abrasives as well as the shape of the abrasive. Common uses for abrasives include drilling, cutting, grinding, polishing, buffing, honing, sharpening, and sanding (see abrasive machining).
Many synthetic abrasives are equivalent to an organic mineral. Differing only in the fact that synthetic minerals are manufactured instead of mined. If natural minerals contain impurities, they tend to be less valuable as this can cause problems in their use. Nowadays, many are synthetic. Some of the abrasive minerals (zirconia alumina) appear naturally though sufficiently more intricate and expensive to resource, because of this, synthetic stones are frequently used in an industrial setting. These are also called artificial abrasives. Other forms of artificial abrasives comprise ceramics, silicon carbide (carborundum), zirconia alumina, alumina or aluminum oxide.
Most of the organic abrasives are minerals obtained from the Earth's crust. Generally synthetic and natural come in a wide variety of shapes and size, commonly known as coated or bonded abrasives, including wheels, belts blocks, discs, rods, sheets & loose grains. Manufactured abrasives are classified into two types coated, and bonded abrasives. Bonded is one of the abrasive materials that are hold within matrix, and aluminum oxide.
Abrasives can also contain sintered material. This type of combined matrix is known as a binder also called as clay, rubber or resin. This combination of a binder and the abrasives are normally structured as wheels, sticks, blocks e.g. for disc cutters. These are commonly used as aluminum oxide, silicon carbide, garnet, tungsten carbide. Differing abrasives are required depending on what is being cut or abraded.
Bonded abrasives are required to be dressed after they are used. Dressing includes various processed including cleaning the waste material from the surface and revealing the new grit. It depends upon the abrasive and how it is used.
Coated abrasives are also minerals that are used in the same way as bonded abrasives. Sandpaper is a best example of coated abrasive. Coated abrasives are structured for use in orbital sanders.