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Properties of magnesium powder alloys and magnesium nitride

wallpapers Industry 2021-04-14
About the production of magnesium nitride
Although magnesium powder directly reacts with nitrogen has industrial value, the production of magnesium nitride powder requires a higher reaction temperature and a longer reaction time, and the shape of the particles is incomplete and easy to agglomerate, which can not meet the industrial quality requirements. Since NH3 is more easily decomposed into N- with broken bonds than N2, and the decomposed H2 inhibits the formation of MgO, ammonia can be used as the nitrogen source. Chen Faqin et al. took liquid ammonia as the nitrogen source and prepared magnesium nitride powder by the direct nitriding method of magnesium powder. The following conclusions can be drawn: through thermodynamic analysis, liquid ammonia is easier to react with magnesium powder than nitrogen to prepare magnesium nitride; High-quality magnesium nitride powder with high purity and uniform powder particles can be prepared by holding the powder at 600℃ and ammonia atmosphere for 1h, and then the temperature is raised to 800℃, the ammonia flow rate is 500ml/min, the nitriding time is 1h.
Application of magnesium and magnesium alloys
Magnesium and magnesium alloys are the lightest metal structural materials in engineering applications so far. In recent years, the plastic forming technology of deformed magnesium alloys has become an important research field in the world magnesium industry, and magnesium-based alloys will play a more important role in the future of energy shortage. Currently, magnesium-based alloys are indispensable and important materials in aerospace, automotive, electronics, construction industry and daily life. However, magnesium-based alloys have their own weaknesses in their wide application, such as low hardness and strength, and lower melting point than steel and other common metals. How to improve the plastic forming ability of magnesium alloys has become a hot topic in the research of magnesium alloys. Therefore, it has important academic and industrial application value to seek for good hardness and strength as well as high specific strength and specific stiffness.
In recent years, with the development of high-end production, mechanical and electrical products, the mechanical properties of magnesium-based alloy need to be further improved, the use of particle reinforced magnesium-based alloy materials can simultaneously play the best potential of the magnesium-based alloy matrix and reinforcing phase, significantly improve the strength of the magnesium-based alloy, elastic modulus, hardness and wear resistance. At the same time, because of its low cost, high strength and stiffness, particle reinforced magnesium base alloy material have a wide application prospect in advanced manufacturing and other modern industrial production fields.

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