Sm-Al-Co system Sm base ternary block amorphous alloy

Abstract

Sm-Al-Co system Sm-based ternary bulk amorphous alloy in the field of new materials, features: its composition range is Smx(Al50-yCo50+y)100-x(x=50~58 at.%, y= -10~+7at.%); the best amorphous forming composition is Sm50Al25Co25; the method of preparing the above alloy is: batching, non-consumable arc melting of alloy ingot, inspection and compensation of volatilization of rare earth Sm, bulk amorphous Negative pressure suction casting of the copper mold of the alloy, wherein the argon pressure used is 0.06-0.08MPa, the current density range is 120-140A / cm2, and the pressure difference of the negative pressure suction casting is 0.04±0.005MPa to obtain a bulk amorphous alloy with a diameter of 3mm. The advantages are: to overcome the shortcomings of complex optimization of Sm-based bulk amorphous components and random composition selection, a new Sm-Al-Co system Sm-based ternary bulk amorphous alloy system has been developed, and the most optimal alloy system has been determined. It is beneficial to the development of Sm-based bulk amorphous alloys with more than quaternary elements on the basis of this ternary composition; the method of checking and supplementing the volatilization of Sm reduces the composition deviation.

Description

technical field

[0001] The invention relates to a series of Sm-Al-Co bulk amorphous alloys with strong amorphous forming ability, belonging to the field of new materials. Background technique

[0002] Amorphous metal alloys are a class of metals or alloys with short-range order and long-range disorder structures, and they have high comprehensive mechanical properties and unique physical and chemical properties. However, due to the influence of metal or alloy amorphous forming ability (that is, the ability to form amorphous alloy), the preparation of such materials requires a higher cooling rate, and the general critical cooling rate is 10 5 K / s. In the order of cooling speed from high to low, commonly used quenching technologies include: melt atomization, thin film deposition technology, and copper roller quenching strip machine technology. The material form is often low-dimensional materials such as powder, thin strip, etc., and its application range are therefore greatly...

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