Metallic Means; The Geometric Substantiation of all Metallic Ratios

Geometric frustration of icosahedron in metallic glasses.

Icosahedral order has been suggested as the prevalent atomic motif of supercooled liquids and metallic glasses for more than half a century, because the icosahedron is highly close-packed but is difficult to grow, owing to structure frustration and the lack of translational periodicity. By means of angstrom-beam electron diffraction of single icosahedra, we report experimental observation of lo...

New Smarandache Sequences: the Family of Metallic Means

The family of Metallic Means comprises every quadratic irrational number that is the positive solution of algebraic equations of the types r--nx-l =0 and r--x-n =0 , where n is a natural number. The most prominent member of this family is the Golden Mean, then it comes the Silver Mean, the Bronze Mean, the NIckel Mean, the Copper Mean, etc. All of them are closely related to quasi-periodic dyna...

Investigation of Manufacturing Processes of the Metallic CNG Pressure Vessels

CNG vessels are used in many vehicles.  Mass production of CNG pressure vessels requires exact understanding of process effective parameters.  In this paper, the numerical analysis has been used to study the manufacturing parameters.  The entire manufacturing processes, including deep drawing, redrawing and ironing, of an aluminum liner sample of CNG pressure vessel (without spinning) have been...

A Broken Metallic Tracheostomy Tube

Influence of Size on the Melting Temperature of Metallic Nanoparticle

   In This paper, the effect of size on melting temperature of metallic nanoparticles (Au, Pb and Bi) is theoretically simulated and explained. In this regard, the cause of difference in various experimental data is introduced, which is the difference between nanoparticles’ grain Gaussian distribution. This volume-depended model with the help of the Gaussian distribution can descri...