119 results about "Quasicrystal" patented technology

Composite coating compositions, composite metallic coatings derived from these compositions, and methods of forming the composite coating compositions and composite metallic coatings, wherein the compositions and coatings comprise particles of at least one quasicrystalline metal alloy and at least one elemental metal. The methods include electrocodepositing suspended quasicrystalline metal alloy particles and dissolved metal ions onto a substrate. Preferably, the substrate is disposed in an aqueous bath containing at least one dissolved metal ion species and at least one suspended quasicrystalline metal alloy powder species. The compositions and coatings enhance the wear, friction, hardness, corrosion, and non-stick characteristics of the substrate.

According to one aspect of the present invention, a light emitting diode (LED) structure including an active core layer and at least one substrate layer having a first refractive index, comprises a 2-dimensional photonic quasicrystal in the structure, the photonic quasicrystal comprising an array of regions having a second refractive index, the array exhibiting long range order but short range disorder. The long range order is associated with diffractive properties of the structure and gives rise to uniform-far field diffraction patterns from the LED. The present invention enjoys the benefit of improved light extraction from LEDs without undesirable far field illumination patterns.

The invention provides a high-strength magnesium alloy which is improved in high-temperature strength without using any expensive rare earth element with cost reduction and a process for the production of the alloy. A high-strength magnesium alloy represented by the composition formula: Mg100-(a+b)ZnaXb(wherein X is at least one member selected from among Zr, Ti and Hf and a and b are contents of Zn and X respectively as represented in at% and satisfy the relationships (1), (2) and (3): (1) a / 28 = b = a / 9, (2) 2 < a < 10, and (3) 0.05 < b < 1.0), wherein Mg-Zn-X quasicrystals and approximants thereof in theform of fine particles are dispersed in a Mg mother phase; and a process for the production of the high-strength magnesium alloy which comprises melting Mg in an inert atmosphere to form molten Mg, adding Mg-Zn-X quasicrystals (wherein X is at least one of Zr, Ti and Hf) to the molten Mg to form a molten alloy, casting the molten alloy, and heat-treating the cast alloy to precipitate the quasicrystals and approximants thereof in the Mg mother phase.

The invention relates to a sapphire substrate and a manufacturing method thereof and a light emitting diode adopting the sapphire substrate and a preparation method thereof. The surface of the sapphire substrate is provided with a graph structure of a photonic quasicrystal structure. The proportion of the area of a C surface of the sapphire substrate, which is exposed in the graph structure, in the whole bottom area of the sapphire substrate is low. The surface of the sapphire substrate is provided with the graph structure of the photonic quasicrystal structure; the graph structure is formed in a mode that sub regions are periodically arrayed and has the lattice constant of 0.2 to 5mum; a space between each two adjacent sub regions is of a V shape or a similar V shape; the sub regions extend to the side wall of the C surface of the sapphire substrate and are at an angle of 25 to 60 degrees with the C surface of the sapphire substrate; and the proportion of the C surface of the sapphire substrate, which is exposed in the graph structure, is lower than 20 percent. The manufacturing method of the sapphire substrate comprises the following steps of: forming the photonic crystal structure on the surface of the sapphire substrate; and then carrying out anisotropic etching on the side wall of the photonic crystal structure by using a phosphoric acid / sulphuric acid mixed solution so as to form the photonic quasicrystal graph structure.