Introduction of powder metallurgy knowledge

The applications of powder metallurgy products is very wide. Wherein the powder metallurgy is an important application of purifying silicon powder, die-casting of the silicon material of the powder into a block, and placed in a vacuum melting furnace or other inappropriate equipment to place the powder in the processing or purification, the other can be in the silicon material die-casting into a massive, powdered silicon is expected to join the binder, and stir well; The method first is press-molded the power and pressed into the bulk material, and then placed in a vacuum furnace avoids causing the loss of the silicon material, also easily lead to contamination of the furnace and vacuum system, affecting the life of the vacuum melting equipment; another object is to provide a binder, the binder may be lack the metal ductility and plastic at room temperature, high hardness, brittleness, and lead to the difficulty of press-forming a very large non-metallic crystalline silicon material, ease of molding, while the binder not only led to the increase of impurities in the silicon in the reaction, but also with the existing silicon impurities, separated the impurities from the silicon and to improve efficiency and purity.

We can see from the history of human technological development, the modern world has experienced two industrial revolutions are the discovery and application of new materials for the pilot. The development of the iron and steel industry, laid the material foundation for the 18th century to invent the steam engine and the application on behalf of the first world revolution. Since the middle of this century, electronic technology, especially the invention and application of microelectronics technology, represented by the second world revolution, the silicon single crystal material plays a central role, combined with the subsequent advent of laser materials and optical fiber human society into the "information age", therefore, to be expected, who mastered the new material, who can grasps the initiative of the 21st century high-tech competition!

Advanced ceramic materials is a multi-functional and system integration technology of functional ceramics, high-performance ceramic films, heterogeneous thin films, integrated with micro-processing technology, the reinforcement of structural ceramics and composites, toughening technology, advanced ceramic low cost, high reliability, the bulk of the preparation technique. The high-temperature superconducting materials mainly mass production technology of high-temperature superconductor materials (quasi-monocrystalline and textured materials), practical high temperature superconducting thin films and heterostructures films preparation, integration and micro-machining technology research and development.

Powder metallurgy is the system use metal or metal powderas the raw materials, after forming and sintering, manufacturing technology of metallic materials, composites and various types of articles. The powder metallurgy method similar to the production of ceramic, therefore, a series of powder metallurgy new technology can also be used for the preparation of ceramic materials. Because of the advantages of powder metallurgy technology, it has become the key to new materials, plays a pivotal role in the development of new materials.

Powder metallurgy techniques can minimize the alloy component segregation, eliminate bulky, a non-uniform cast structure. In the preparation of high-performance rare earth permanent magnet materials, rare earth hydrogen storage materials, luminescent materials, rare earth catalyst, high-temperature superconducting materials, new metallic materials (such as the Al-Li alloy, heat Al alloy, superalloy powder corrosion of stainless steel, powder high speed steel high-temperature structural materials, intermetallic compound, etc.) have an important role.

Source:http://www.mhcmp.com