Abstract: A drill bit including a button array having different radii extending from the center of a head section, and more particularly, to a drill bit in which buttons are arranged so as to have different radii from the center of a drill bit head section, thereby striking bedrock points having different radii and improving the efficiency of a drilling operation.

Abstract: Provided are a crystalline alloy having significantly better thermal stability than an amorphous alloy as well as glass-forming ability, and a method of manufacturing the crystalline alloy. The present invention also provides an alloy sputtering target that is manufactured by using the crystalline alloy, and a method of manufacturing the alloy target. According to an aspect of the present invention, provided is a crystalline alloy having glass-forming ability which is formed of three or more elements having glass-forming ability, wherein the average grain size of the alloy is in a range of 0.1 ?m to 5 ?m and the alloy includes 5 at % to 20 at % of aluminum (Al), 15 at % to 40 at % of any one or more selected from copper (Cu) and nickel (Ni), and the remainder being zirconium (Zr).

Abstract: The present invention relates to a sputtering target of a multi-component single body, a preparation method thereof, and a method for fabricating a multi-component alloy-based nanostructured thin film using the same. The sputtering target according to the present invention comprises an amorphous or partially crystallized glass-forming alloy system composed of a nitride forming metal element, which is capable of reacting with nitrogen to form a nitride, and a non-nitride forming element which has no or low solid solubility in the nitride forming metal element and does not react with nitrogen or has low reactivity with nitrogen, wherein the nitrogen forming metal element comprises at least one element selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Y, Mo, W, Al, and Si, and the non-nitride forming element comprises at least one element selected from Mg, Ca, Sc, Ni, Cu, Ag, In, Sn, La, Au, and Pb.

Abstract: A drill bit including a button array having different radii extending from the center of a head section, and more particularly, to a drill bit in which buttons are arranged so as to have different radii from the center of a drill bit head section, thereby striking bedrock points having different radii and improving the efficiency of a drilling operation.

Abstract: Provided are a crystalline alloy having significantly better thermal stability than an amorphous alloy as well as glass-forming ability, and a method of manufacturing the crystalline alloy. The present invention also provides an alloy sputtering target that is manufactured by using the crystalline alloy, and a method of manufacturing the alloy target. According to an aspect of the present invention, provided is a crystalline alloy having glass-forming ability which is formed of three or more elements having glass-forming ability, wherein the average grain size of the alloy is in a range of 0.1 ?m to 5 ?m and the alloy includes 5 at % to 20 at % of aluminum (Al), 15 at % to 40 at % of any one or more selected from copper (Cu) and nickel (Ni), and the remainder being zirconium (Zr).