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Method for improving plasticity of bulk metal glass and structural component thereof

A technology for bulk metal and structural parts, which is applied in the field of improving the plasticity of bulk metal glass and its structural parts by gas-phase hydrogenation method, can solve the problems of difficult distribution, low yield strength, and high improvement, and achieves improved plasticity and high yield strength. The effect of reducing and not reducing thermal stability

Active Publication Date: 2011-08-24
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods for improving the plasticity of bulk metallic glasses reported above are all through changing the internal structure of bulk metallic glasses, which cannot guarantee that the prepared bulk metallic glasses are fully amorphous, which reduces the bulk metallic glass to a certain extent. strength, wear resistance and corrosion resistance, etc., and the interfacial energy between the reinforced phase and the matrix of the bulk metallic glass composite material prepared by the endogenous method is relatively low, so that the yield strength is low; The distribution of the reinforcement phase in bulk metallic glass composites is difficult to control, and the interfacial energy between the reinforcement phase and the matrix is ​​very high, and interfacial reaction occurs at the interface to form a brittle phase, which is not conducive to the improvement of the mechanical properties of the bulk metallic glass
In addition, the above two methods improve the plasticity by changing the inherent properties of the material, and it is difficult to solve the problem of improving the plasticity of the formed bulk metallic glass structural parts
Although some technical methods for improving bulk metallic glass have been invented at present, and the prepared bulk metallic glass has certain mechanical properties, this is far from meeting people's needs for it. Therefore, the new improved bulk metallic glass Research and development of plasticity method is imperative

Method used

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  • Method for improving plasticity of bulk metal glass and structural component thereof
  • Method for improving plasticity of bulk metal glass and structural component thereof
  • Method for improving plasticity of bulk metal glass and structural component thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Selection of matrix components: The purity of the raw materials used to prepare the master alloy ingot is 99.9% Cu, 99.99% Zr, 99.5% Al and 99.99% Ni, and the nominal composition of the alloy is Cu 45 Zr 46 al 7 Ni 2 (atomic percent).

[0027] Preparation of the master alloy: Under the condition of Ti inhalation and high-purity argon protection, the master alloy is melted by non-consumable arc melting.

[0028] Mechanically grind the surface of the metal raw material to remove the oxide skin on the surface, and mix the ingredients according to the designed composition ratio; weigh the precision

[0029] To within 0.001g, put the prepared material into the water-cooled copper crucible in the melting furnace according to the weight of about 60-80g per ingot

[0030] Inside, cover the furnace lid and evacuate to 5×10 -3 Below Pa; fill the furnace with high-purity argon with a pressure of 0.06MPa.

[0031] Before the master alloy ingot is melted, the Ti ingot use...

Embodiment 2

[0037] The matrix composition is selected as Zr 41.2 Ti 13.8 Cu 12.5 Ni 10 be 22.5(atomic percent). The preparation of the master alloy is the same as step 2 of Example 1, and the preparation of the sample is the same as step 3 of Example 1, except that the hydrogenation treatment temperature is 100° C., the hydrogen pressure is 5 MPa, and the hydrogenation time is 1.5 hours. The performance test is the same as step 5 of Example 1. The structure and thermal stability of the hydrogenated BMG do not change, the hydrogenated BMG has a plastic deformation of 3.5%, and the non-hydrogenated BMG has no plasticity.

Embodiment 3

[0039] The matrix composition is chosen as La 62 al 14 (Cu,Ni) 24 (atomic percent). The preparation of the master alloy is the same as step 2 of Example 1, and the preparation of the sample is the same as step 3 of Example 1, except that the hydrogenation treatment temperature is 80° C., the hydrogen pressure is 10 MPa, and the hydrogenation time is 0.5 hours. The performance test is the same as step 5 of Example 1. The structure and thermal stability of the hydrogenated BMG do not change, the hydrogenated BMG has a plastic deformation of 2.5%, and the unhydrogenated BMG has no plasticity.

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Abstract

The invention discloses a method for improving plasticity of a bulk metal glass and a structural component thereof. The plasticity of the bulk metal glass and the structural component thereof is improved by using a vapor hydrogenation treatment method. The method comprises the following steps of: 1, selecting components of master alloy matrix, and performing non-consumable arc melting on the components to obtain a master alloy ingot; 2, crushing the master alloy ingot in a container, and performing re-melting and blowing casting to form the bulk metal glass; and 3, performing vapor hydrogenation treatment on the bulk metal glass or the bulk metal glass structural component prepared in the second step. The plasticity of the bulk metal glass and the structural component thereof treated by the method is improved, the bulk metal glass still keeps a glass state structure, and the original thermal stability and the original yield strength of the bulk metal glass are not reduced.

Description

technical field [0001] The invention relates to a method for improving the plasticity of bulk metallic glass and its structural parts, in particular to a method for improving the plasticity of bulk metallic glass and its structural parts by gas-phase hydrogenation. Background technique [0002] Since the 1980s, bulk metallic glasses have become a hot and frontier issue in international research due to their excellent mechanical properties. However, most of pure amorphous bulk metallic glasses are brittle at room temperature, which greatly limits the application of bulk metallic glasses in engineering. To solve this problem, at present, the method of introducing a second phase into the bulk metallic glass matrix is ​​mainly adopted in the world to form a bulk metallic glass composite material, so that the plasticity of the bulk metallic glass is better than that of the previous pure amorphous bulk metal. Glass has been greatly improved, and the main two technical methods are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/10C22F1/02
Inventor 杜宇雷许宏伟陈光
Owner NANJING UNIV OF SCI & TECH
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