Polishing and Lapping Materials

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Polishing and Lapping Materials

 

finely dispersed powdery substances, as well as pastes and suspensions having these substances as a base, used in polishing and lapping. The powders used for polishing are classified as hard, such as diamond or corundum, or soft, such as ultramarine and oxides of iron, chromium, and aluminum. Hard powders, with a grain size of 0.1 to 60 microns, are used in lapping and preliminary polishing. Final polishing is done with soft powders, of which metal oxides have the greatest polishing capability. In polishing, the polishing and lapping materials are primarily used in paste and suspension form. Pastes consist of polishing powders, fats, binders, surface-active agents, and other substances. Suspensions are composed of powders, acid and alkaline solutions, and corrosion inhibitors.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.