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Powder Metallurgy Will Promote Development of New Material


Powder Metallurgy Will Promote Development of New Material 2012-11-12
In recent decades, material science and technology has achieved extremely rapid development. One of the typical material science and technology is powder metallurgy technology which has given a full play in manufacturing modern high-tech and new materials, such as nanometer materials, superconducting material, high magnetic materials, and so on. New materials refer to the newly emerging materials which are made by scientists and technicians through research and development and which perform the excellent functions as the traditional materials. New material production technology is key common technology for the development of modern industries and high technology. Information, energy, agriculture and advanced manufacturing cannot be well developed with the supporting of new materials development.
Powder metallurgy is an important advanced technology which contains two processes. Firstly, it produces metal powders, metal compounds powders, and alloy powders like ultrafine atomized alloy powders. Secondly, it will take the prepared metal powders as the raw material to produce new materials, including metal material, cermet material, and ceramic structure material, etc through forming and sintering. The preparation of ultrafine powder and nanocrystalline powder is the key technology of powder metallurgy. Through wide spread application of powder metallurgy, now the manufacturers can prepare and produce the high-powered rare earth luminescent material, rare earth permanent magnet, and high temperature superconducting material, etc.
Powder metallurgy technology plays an important role in promoting the development of new material preparation and production technology. First of all, powder metallurgy can be used to make most of the refractory metal and compounds, and porous biological materials which cannot be produced through traditional smelting method. For example, porous membrane material is made through powder metallurgy. Next, it can be applied to develop special materials with electrical, magnetic, optical and mechanical properties, such as nanocrystalline, quasicrystal, minicrystal, and amorphous materials. Thirdly, it is a technology for materials regeneration and comprehensive utilization and it can make full use of ore tailings, steelmaking sludge, rolling steel descaling, and recycling waste metal as raw materials to smelt new materials. The production of rare earth functional materials is also a significant application of powder metallurgy technology. Powder metallurgy technology can minimize the clustering of alloy components as well as eliminate the bulky and uneven cast structure. Therefore, powder metallurgy has been widely used in producing rare earth hydrogen storage material, rare earth luminescent materials, rare earth permanent magnet, rare earth catalyst, high temperature superconducting materials, and super alloys, etc.