Cu₆Sn₅ whiskers precipitated in Sn3.0Ag0.5Cu/Cu interconnection in concentrator silicon solar cells solder layer were found and investigated after reflow soldering and during aging. Ag₃Sn fibers can be observed around Cu₆Sn₅ whiskers in the matrix microstructure, which can play an active effect on the reliability of interconnection. Different morphologies of Cu₆Sn₅ whiskers can be observed, and...

To improve the wear resistance of TMR blade and investigate effect nano-La2O3 Mo on laser cladding coating. 65Mn as substrate, La2O3, Mo-La2O3 composite powders were added into Ni60a/SiC powder. Using scanning electron microscopy, X-ray diffraction, photoelectron spectroscopy CFT-I surface synthesizer, phase composition, element distribution friction properties coating analyzed to obtain best c...

abstract : alumina (al 2 o 3 ) is one of the most practical ceramics used in making ceramic-metal armours. to improve the properties of alumina, some other materials are added to it. in this paper, sic material as nano powder is added to alumina, and four armour samples of this new ceramic with different volume fractions (v.f. ) including 0%, 5%, 10% and 15% of sic particles are made. then, the...

The addition of SiC or TiC nanoparticles to polycrystalline alumina matrix has long been known as an efficient way of improving the mechanical properties of alumina-based ceramics, especially strength, creep, and wear resistance. Recently, new types of nano-additives, such as carbon nanotubes (CNT), carbon nanofibers (CNF), and graphene sheets have been studied in order not only to improve the ...

The dielectric behavior of insulations is a key factor affecting the development anti-corona materials for generators. Epoxy resin (EP), as matrix, blended with inorganic fillers micron SiC and nano SiO2 to investigate effect micro doping on conductivity breakdown mechanism composites. Using experimental simulation analysis, it found that nano-SiO2 concentration related dispersion particles. lo...

Harbor seals (Phoca vitulina) often live in dark and turbid waters, where their mystacial vibrissae, or whiskers, play an important role in orientation. Besides detecting and discriminating objects by direct touch, harbor seals use their whiskers to analyze water movements, for example those generated by prey fish or by conspecifics. Even the weak water movements left behind by objects that hav...