Amorphous alloy and method for preparing same

Abstract

The invention discloses an amorphous alloy and a method for preparing the amorphous alloy. The amorphous alloy has a chemical formula of ZraCubAlcMdNe; M is one or more of Ni, Fe, Co, Mn, Cr, Ti, Hf, Ta, Nb and rare-earth element; N is one or more of Ca, Mg and C; a, b, c, d and e represent the atomic percentage respectively, wherein 40<=a<=70, 15<=b<=35, 5<=c<=15, 5<=d<=15 and 0<=e<=2, and a+b+c+d+e=100. Because the amorphous alloy contains the elements of calcium, magnesium and carbon, the used amount of the noble metal is effectively decreased or eliminated, the content of oxygen, nitrogen and other non-metallic elements in the amorphous alloy is effectively inhibited, the critical dimension and the mechanical properties of the amorphous alloys are improved, and hereby the amorphous alloy is more suitable for industrial production and promotion. In addition, due to the addition of the elements of calcium, magnesium and carbon, the requirement for the purity of the raw materials of the amorphous alloy is lowered, and hereby the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of material science, and in particular relates to an amorphous alloy and a preparation method thereof. Background technique [0002] Amorphous alloys appeared in the 1960s. The initial amorphous alloys could only reach the micron level because of the critical size (the largest size of the amorphous alloy), so it was difficult to be practically applied. However, high strength, high hardness, corrosion resistance and Excellent high-temperature fluidity and other material properties have attracted a large number of scientific researchers and have been extensively studied. They have continuously developed amorphous alloys with large critical sizes and are suitable for industrial production. The critical size has gradually developed from microns to millimeters. Reaching the centimeter level, the amorphous alloy with a critical cooling rate of less than 500°C / s and a critical size greater than 1mm is usually calle...

AI Technical Summary

Problems solved by technology

[0003] However, the amorphous formation ability of amorphous alloys is easily affected by non-metallic elements or miscellaneous elements, resulting in a significant reduction in the critical size of amorphous alloys or even the failure to form amorphous, especially non-metallic gas elements such as oxygen and nitrogen will greatly deteriorate the critical size. [Weihua Wang, Progress in Materials Science, Volume 52, Issue 4, May 2007, Pages 540-596], so the purity requirements of raw materials are usually very strict, and the requirements for smelting environment are also very researched, and even high vacuum preparation is required Conditions [C.T.Liu etc, Metallurgical and materials transaction A, 1998, Vol29A, P1811-1820], thus greatly increasing production costs and making it difficult for industrialized production

[0004] In addition, although the Zr-Ti-Cu-Ni-Be alloy system researched and developed by Peker and Johnson [US 5288344] and the Zr-M-N-Y alloy system developed by Yong Zhang et al. [US 6682611B2] have good amorphous alloy critical size, which reduces the requirements for the purity of raw materials and preparation conditions, especially can effectively reduce the oxygen content, but the alloy contains a large amount of precious metals such as Be and Y, which leads to high production costs and use costs, and limits the use of amorphous alloys. Promote application

Images