Powder Metallurgy

Powder metallurgy is a technology that uses metal powder or the mixture of metal powder and other nonmetal powder as raw materials to manufacture metal materials, composite materials, and various types of products through forming and sintering. It is a branch of metallurgy.

A Brief History

Around 3000 BC, Egyptians reduced iron oxide with carbon to obtain sponge iron, which was forged at high temperature into dense blocks and then beaten into ironware. In the third century, Indian blacksmiths made Iron pillar of Delhi with this method, weighing 65 tons. At the beginning of the nineteenth century, Russia and Britain successively developed the technology of producing dense platinum by cold pressing, sintering and hot forging platinum powder. In 1909, Coolidge, William David invented the method of making tungsten wire for bulbs by powder metallurgy, which laid the foundation of modern powder metallurgy. In the following 20 years, tungsten and molybdenum products, cemented carbide, bronze...