Discussion Of Nickel Cobalt Alloy Powders Application Prospects

With the rapid development of science and technology

, people have different requirements for materials. Ultrafine particles have small size effect and surface effect. It aroused the interest of many researchers in a long time. The grain size is small and uniform, with low reunion, large surface area and high chemical activity. It provides a broad prospect for the development of new materials. Because Ni-Co alloy powder has special properties and special surface magnetic those are different from the elemental nickel and cobalt metal powder. It has broad application prospects in the carbide, magnetic materials, catalysts, batteries and other industries. For example, due to fine grain, it has been widely used in memory magnetic cobalt, magnetic and other electronic products.

Cobalt metal is expensive with scare resource people have been studying a substitute for cobalt. The common substitutes are nickel and iron, low iron powder as a binder carbide is usually mechanical strength of pure nickel powder as hard the performance of the alloy binder phase, and the resulting physical and mechanical properties as cobalt carbide binder, and process control difficulties. Therefore, the dispersion strengthened alloy manner binder phase has always been the basic starting point for the preparation of a new generation of carbide. In order to overcome the pure nickel for the shortcomings of the bonding metal and cobalt metal savings, many countries have carried out part of the cobalt to the nickel part to replace, and have achieved good results. Increase the sensitivity of the tool gap with the sticky combination of the metal in nickel content improved.

The researchers found that after 1400 C sintering for 1 hour, regardless of bonding the nickel content in the metal alloy almost able to achieve full densification. Hydrogen storage alloy is an alloy of a crystal gap of bulk storage of hydrogen atoms. This alloy has the magical nature of reversible hydrogen absorption and desorption. It can store the equivalent of thousands of times on the boron powder alloy its own volume of hydrogen, the hydrogen absorption density than liquid hydrogen and solid hydrogen density, light and safe, showing the incomparable superiority.

The hydrogen storage alloy with practical value must have following basic properties: hydrogen storage volume; easy activation; moderate dissociation pressure; fast hydrogen absorption and desorption reaction at room temperature; low cost and long life. Nickel-cobalt alloy coating was white, which is one of the good corrosion resistance alloy coating. It applies to watches, bicycle parts, such as electroplating, as a semi-bright nickel - nickel or nickel - copper plating on behalf of the chrome plating, it has good weldability. It is suitable for use in electronic components and printed circuit board. Cobalt join to improve the luster of the nickel coating to make it more fullness, and improve the hardness and strength of the pure nickel layer, while the low contact resistance, so it not only as a protective decorative coating, but also as a mechanical coating use. It is used in electroplating because of its high hardness.

Currently, magnetic recording technology has become an important part of the new information technologies. The main requirements for magnetic recording are to increase the recording density and record capacity and equipment miniaturization. It puts forward higher requirements for magnetic recording media and magnetic recording head. Nickel-cobalt silicon powder alloy has a critical anisotropy and low thermal conductivity characteristics and become very important magnetic materials. It is especially in the magnetostrictive sensor materials. Nitrous oxide as byproducts of the internal combustion engine circulating fluidized bed, automobile exhaust gases, fatty acids, it is often discharged into the atmosphere. Nitrous oxide has effects of the catalyst on the destruction of ozone in atmosphere and room temperature. Therefore, starting from the point of view of environmental protection, the nitrous oxide needs to break down before entering into the atmosphere. Nickel and cobalt play roles in the decomposition of nitrous oxide. And the nickel and cobalt alloy powders effect on catalytic decomposition reaction is more pronounced.Source:http://www.mhcmp.com

by: anelwew

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