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Material from the Columbia space talks
发布时间:2007-03-31 阅读次数:2436 信息来源:
发布时间:2007-03-31 阅读次数:2436 信息来源:
Space Shuttle Columbia explosion, which shocked the world, but also a source of aerospace materials. Aerospace Science and Industry are invited to the Group 2 min, a researcher at the Institute of Materials we talk about the uniqueness of space. Special guest : min, there are many types of materials, different materials have different purposes, How is the economy is a difficult material to use to apply knowledge, it is often because of
people’s ignorance or neglect. brought many disastrous consequences, such as the rocket exploded and the plane crashed, train derailment, the collapse of buildings…… from death and destruction, the loss is incalculable. What is the material? Cihai to materials which are defined as follows : After the labor of human labor as raw materials, include the industrial processing of raw materials such as cement materials such as steel. Materials, the experts were as follows : material civilization and an important milestone in human evolution. In today’s world new technology revolution, materials, energy and information known as the three pillars of civilization. What are the characteristics of aerospace materials? In many materials, many types of aerospace materials. As rockets, missiles and satellites of different types and their respective needs, it is the wide variety of materials are used. liquid, solid, gas, ferrous metals, nonferrous metals and various non-metallic, superplastic materials, composite materials, as many as several thousand species. But so much material to choose up to the very harsh requirements. Some requirements can resist high temperatures, high pressure resistance. combustion engine propellant grain will be generated, the high temperatures of over 30 degrees Celsius, the 6 MPa pressure. instantaneous temperature thermal shock produced 2,500 degrees Celsius, which requires high temperature engine materials. high performance. Some LOX/LH2 used for rocket propellant, rocket-storage tanks need to be able to withstand ultra-low-temperature materials. also corrosion resistance, anti-erosion.
And as submarine-to-surface missile, the material must be able to withstand the enormous underwater load, and also have good stealth. strong interference can be characterized by tolerance harsh environment. In addition, the details of some of the material requirements are very strict. If the microscopic structure of materials, grains, mixed; Functional Materials functional parameter sensitivity; The magnetic alloy precision. coercivity, remanence; -- Dielectric the resistance, breakdown strength, loss dielectric constant; microwave and poured absorbentcomposite material’s transparency; Sealing material sealed reperfusion; Adhesive bonding strengthwith very detailed requirements. Why the emphasis on aerospace materials selection? NASA needs very careful material selection. Rocket, missile, satellite often 100 million, if the materials resulted in failure, the loss is immeasurable. U.S. space shuttle Challenger in January 1986 during the first 10 hours. Connection of the right rear engine seal materials failure solid, liquid leakage, resulting in the sky 73 seconds after the explosion. 7 crew members on board. A company in the United States, a technician had also deserted the rivet installed on the Space Shuttle, was discovered, This company was fined 100 million U.S. dollars, which the craft was sentenced to 20 years in prison. December 28, 1991 China launched the Dongfanghong-A communications satellite because of a minor on the 2nd Relay Residual metal litter caused failure. The selection shows that space is very important. Aerospace technology is a complex systems engineering, which applied the latest achievements of modern science and technology and many other fields. basic industry is closely combine science and technology with the product. If not carefully selected based on the material basis of all other efforts will be derailed. Not long ago, the Space Shuttle Columbia tragedy reminds us once again of the importance of this issue. How to test the performance of aerospace materials?
people’s ignorance or neglect. brought many disastrous consequences, such as the rocket exploded and the plane crashed, train derailment, the collapse of buildings…… from death and destruction, the loss is incalculable. What is the material? Cihai to materials which are defined as follows : After the labor of human labor as raw materials, include the industrial processing of raw materials such as cement materials such as steel. Materials, the experts were as follows : material civilization and an important milestone in human evolution. In today’s world new technology revolution, materials, energy and information known as the three pillars of civilization. What are the characteristics of aerospace materials? In many materials, many types of aerospace materials. As rockets, missiles and satellites of different types and their respective needs, it is the wide variety of materials are used. liquid, solid, gas, ferrous metals, nonferrous metals and various non-metallic, superplastic materials, composite materials, as many as several thousand species. But so much material to choose up to the very harsh requirements. Some requirements can resist high temperatures, high pressure resistance. combustion engine propellant grain will be generated, the high temperatures of over 30 degrees Celsius, the 6 MPa pressure. instantaneous temperature thermal shock produced 2,500 degrees Celsius, which requires high temperature engine materials. high performance. Some LOX/LH2 used for rocket propellant, rocket-storage tanks need to be able to withstand ultra-low-temperature materials. also corrosion resistance, anti-erosion.
And as submarine-to-surface missile, the material must be able to withstand the enormous underwater load, and also have good stealth. strong interference can be characterized by tolerance harsh environment. In addition, the details of some of the material requirements are very strict. If the microscopic structure of materials, grains, mixed; Functional Materials functional parameter sensitivity; The magnetic alloy precision. coercivity, remanence; -- Dielectric the resistance, breakdown strength, loss dielectric constant; microwave and poured absorbentcomposite material’s transparency; Sealing material sealed reperfusion; Adhesive bonding strengthwith very detailed requirements. Why the emphasis on aerospace materials selection? NASA needs very careful material selection. Rocket, missile, satellite often 100 million, if the materials resulted in failure, the loss is immeasurable. U.S. space shuttle Challenger in January 1986 during the first 10 hours. Connection of the right rear engine seal materials failure solid, liquid leakage, resulting in the sky 73 seconds after the explosion. 7 crew members on board. A company in the United States, a technician had also deserted the rivet installed on the Space Shuttle, was discovered, This company was fined 100 million U.S. dollars, which the craft was sentenced to 20 years in prison. December 28, 1991 China launched the Dongfanghong-A communications satellite because of a minor on the 2nd Relay Residual metal litter caused failure. The selection shows that space is very important. Aerospace technology is a complex systems engineering, which applied the latest achievements of modern science and technology and many other fields. basic industry is closely combine science and technology with the product. If not carefully selected based on the material basis of all other efforts will be derailed. Not long ago, the Space Shuttle Columbia tragedy reminds us once again of the importance of this issue. How to test the performance of aerospace materials?