Copper coatings mechanical properties

COPPER AND COPPER ALLOY COATINGS Table 13.14 Mechanical properties of electrodeposited copper ... 

The most likely CVD applications of these superconductors to reach the practical stage are coatings for semiconductor and other electronic-related applications. For 1 arger current-carrying applications, a superconductor coating over a metallic conductor such as copper may also become a practical design because of its advantage over a monolithic superconductor wire. It is able to handle current excursions and has better mechanical properties. 

Nickel in Nanometer Materials. Coating a metal with an ultrathin layer of another metal creates properties not found separately in either of the materials. Considerable recent research has been directed toward improving the mechanical properties of bimetallic laminates, sometimes called composition modulatedfilms, which have interlayers only a few nanometers thick. Attractive properties also have been found for similar systems, called nanometer materials. Nickel has been used in combination with copper, ruthenium, and other metals for producing these new materials. 

The effect of chemicals used during the CMP process on the mechanical properties of copper and W thin films was investigated by dipping the wafers coated with these films in 5 wt % H202and 0.1 M ferric nitrate solutions, respectively. The wafers were dipped for five minutes, washed in de-ionized water and dried. Hardness of these exposed films was measured as above. 

An important category of the surface finishing industry is plating. This includes the process of electroplating which provides metals with surface coatings (usually by electrodeposition) for corrosion protection, wear resistance, improved electrical and mechanical properties, etc. Ferrous and non-ferrous materials can be electroplated with copper, nickel, chromium, zinc, lead, cadmium, etc. They can also be electroplated with precious metals such as gold and silver. 

We have studied the mechanical properties of PVC coated copper wire in a wide temperature range before and after subjecting the wire to an elevated temperature for a certain defined time. 

Novamet developed a concept to improve the properties of nickel flakes by coating them with 15% silver. The coated flakes have both conductivity and ferromagnetic properties. In addition, because of the differences in density (Ag -10.5 andNi- 8.9 g/cm ), it is possible to save 15% in material since conductivity is related to volume rather than to weight and surface conductivity is usually of primary importance. Figure 2.39 shows the morphology of several conductive materials. Metal flakes from silver coated nickel and copper flakes have irregular shapes because they are formed from spherical particles which were first coated with silver and then flattened by mechanical forces. The apparent difference in... 

Among all the hard materials, one is outstanding diamond [5, 40-46]. Its combination of mechanical, physical, and chemical properties is nearly unique. Its thermal conductivity is five times better than that of copper, and its friction coefficient is close to that of PTFE (Teflon). Therefore, it is very desirable to produce thin diamond coatings. At present, the limiting factor to the development of diamond coatings is the poor adhesion of diamond crystallites to many metals. Studies show... 

Recent studies have explored different mechanisms of antimicrobial action by designing hybrid nanomaterials that provide a new approach to killing microbes. One option employs a low-cost methodology to prepare nanosized copper-PANI nanocomposite materials with enhanced antibacterial and antifungal properties. Copper oxide nanocrystals immobilised in a PANI matrix coated onto fabrics for the improvement of antimicrobial activity could be an excellent application in coating technology. 

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