Modern advanced powder metallurgy materials
Powder metallurgy materials in the field of information mainly refer to powder
(1) powder metallurgy materials in the field of information
Powder metallurgy materials in the field of information mainly refer to powder metallurgy soft magnetic materials, and soft magnetic materials can be divided into 2 kinds: metal materials and ferrite materials. Among them, ferrite materials are very early. The manufacturing technology of this material is very limited. At the present stage, it can only be made by powder metallurgy technology. In the metal, iron and iron alloy is the main source of making metallic soft magnetic materials, such as steel, iron and iron cobalt alloy.
In the early twentieth Century, people had begun to use magnetic materials to record information. In 1941, people began to use magnetic powder as a media material for recording. Since 1980s, people continue to study the magnetic recording materials, expand the types of new magnetic recording materials, but also greatly promoted the development of magnetic recording technology, breeding of magnetic materials market, the market for information recording tape magnetic memory and computer increasing demand. These magnetic materials are quite different from the traditional magnetic materials. Their main form is that they exist in the organic medium in the form of particles, and they are used after the magnetic powder is deposited into the state of magnetic film. In addition, the magnetic powder is also used extensively for the production head, the main function is to head the existing information processing, specific performance: first, record audio and video, text information; second, reread the information playback according to needs; third, can erase the original information, especially the information is of no value. At present, ferro silicon aluminium alloy and aluminum iron alloy is mainly made of magnetic alloy magnetic materials; in addition, iron oxides can also be used at present, in the manufacturing of high performance rare earth permanent magnet materials process, powder metallurgy technology occupies an important position, the use of this technology can produce high performance NdFeB, this compound in the market popular, whether military or civilian market has a great demand.
(2) powder metallurgy materials in the field of energy
Energy material is a material that plays a significant role in the energy field. It can promote the development of energy and play a key role in building new energy system, and it can meet a series of materials needed for new energy saving technologies. According to a certain standard, these materials can be divided into 2 categories: energy storage materials and new energy materials. The basis of the application of hydrogen energy is the storage and transportation of hydrogen energy. In 1990s, many countries actively developed hydrogen storage materials. Such as the United States hydrogen storage technology R & D funds accounted for more than half of all the hydrogen researchfunding, Japan is one-time investment of $5 billion for the development of new sunshine plan "in hydrogen power generation technology. At present, there are many kinds of hydrogen storage alloy materials, such as rare earth, magnesium and nickel, and ferro titanium. With the increase of fossil fuel production and the depletion of the earth's energy, a new alternative energy is urgently needed. Among them, nuclear energy is an ideal clean energy, and has great potential for development. All countries are unwilling to lag behind in the field of nuclear energy, and have intensified their research and development efforts. They all want to take a place in the world energy market. According to the statistics of relevant departments: as of now, the power generation of nuclear energy has accounted for about 20% of the world's total power. Now, the world nuclear power technology matures, used for power generation nuclear power reactor is a thermal reactor, the reactor will not have two radiation pollution during operation, and with the increase of amount, the production cost is greatly reduced, the price is relatively low, with the development of nuclear energy technology has become a lot of countries competing sought after cleaning one of the energy technology. New energy materials play an important role in the development of new energy field. The development and utilization of new energy materials can promote the development and popularization of fuel cells and solar cells. At present, new energy materials mainly include silicon solar cells, nuclear energy and other clean energy. Powder metallurgy technology plays an important role in the production of new energy materials.
(3) powder metallurgy materials in the field of Biology
The study of biomaterials has a great effect on society, and biotechnology occupies a large proportion in high and new technology. In China, biological materials have been included in the national strategic plan, and biological materials are the main research objects in the future. Some biomaterials can repair the function or structure of an organism. These materials are biomedical materials. Biomedical materials play an important role in the physical and mental health of human beings. In biological materials, a large number of metal alloys or compounds are powder metallurgy materials.
From the early twentieth Century, people began to use metals and alloys as medical biomaterials, and the use of biomaterials to replace the human skeleton was widely used. Artificial and artificial teeth, such as artificial and artificial teeth, have a special role in surgery. Stainless steel, titanium and titanium alloys are more metal materials used in medicine. Titanium alloys have similar biological properties with human bones, similar elasticity, wear resistance and corrosion resistance. They are the 1 most applied metal materials.
Bioceramics have some physiological characteristics similar to human body. Therefore, this material is often used to make artificial bones and teeth. The special physiological behavior of biological ceramic has is that it has the following features: first, the similarity with the original organism, so it can be combined, damage and stimulation to the organism will not be replaced by the basic performance and organization matching, has good tissue compatibility; second, bio ceramic will not cause the body the lesions;