Metal Powder

Metal powder is a discrete metal particle group less than 1 mm. Metal powder, including single metal powder, alloy powder, and some refractory compound powder with metal properties, is the main raw material of powder metallurgy.

History

The preparation and application of metal powders have a long history. In ancient times, gold, silver, copper, bronze, and some oxide powders were used as coatings for coloring and decoration of pottery, jewelry, and other instruments. At the beginning of the twentieth century, an American named William David Coolidge produced tungsten powder, and made tungsten wire by using hydrogen to reduce tungsten oxide, which marks the beginning of modern metal powder production. Later, such powders as copper powder, cobalt powder, nickel powder, iron powder, and tungsten carbide powder were prepared by the chemical reduction method, promoting the development of early powder metallurgy products (porous bearings, porous filters, cemented carbides, etc.). At this...