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Surface treatment method of zirconium-based ternary amorphous alloy

An amorphous alloy and surface treatment technology, applied in the field of materials, can solve problems such as the performance degradation of zirconium-based amorphous alloys, limit the service range of zirconium-based ternary amorphous alloys, affect the internal structure and composition of alloys, and achieve excellent mechanical properties , good glass forming ability, and the effect of improving surface properties

Active Publication Date: 2021-07-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Arthur T. Motta et al. published a review titled "Hydrogen in zirconium alloys: A review" in Journal of Nuclear Materials 518 (2019) 440-460, discussing that hydrogen reacts with zirconium in the matrix of zirconium-based alloys to form hydrides, leading to Pores and cracks appear in the oxide layer, which further affects the structure and composition of the alloy and reduces the properties of the zirconium-based amorphous alloy.
Therefore, the traditional method of preparing an oxide layer by dry oxidation limits the service range of zirconium-based ternary amorphous alloys.

Method used

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  • Surface treatment method of zirconium-based ternary amorphous alloy
  • Surface treatment method of zirconium-based ternary amorphous alloy
  • Surface treatment method of zirconium-based ternary amorphous alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Amorphous alloy Cu 25at.％ Zr 50at.％ al 25at.％ Carry out phase identification to confirm that it is amorphous, such as diagram 2-1 shown. Put the sample in acetone, clean it with an ultrasonic cleaner for 1 minute, then take the sample out and put it in alcohol to continue ultrasonic cleaning for 1 minute, and finally blow dry the surface of the sample with dry compressed nitrogen. Afterwards, put the sample into a tube furnace that has been heated to 250°C in advance, inject high-temperature oxygen with a water content of 1vol.%, the oxygen flow rate is 10ml / min, and the steam heating temperature is 100°C. After constant temperature for 1 hour, take it out for cooling . can be formed on amorphous surfaces such as figure 1 The oxide layer structure shown in (a), which protects the inner matrix well, and the passivation behavior can effectively prevent further oxidation of the alloy.

Embodiment 2

[0038] Amorphous alloy Cu 25at.％ Zr 50at.％ al 25at.％ Carry out phase identification to confirm that it is amorphous, such as diagram 2-1 shown. Put the sample in acetone, clean it with an ultrasonic cleaner for 1 minute, then take the sample out and put it in alcohol to continue ultrasonic cleaning for 10 minutes, and finally blow dry the surface of the sample with dry compressed nitrogen. Afterwards, put the sample into a tube furnace heated to 250°C in advance, feed high-temperature oxygen with a water content of 10vol.%, the oxygen flow rate is 100ml / min, and the steam heating temperature is 100°C. After 5 hours of constant temperature, take it out for cooling . can be formed on amorphous surfaces such as figure 1 The oxide layer structure shown in (a), which protects the inner matrix well, and the passivation behavior can effectively prevent further oxidation of the alloy.

Embodiment 3

[0040] Amorphous alloy Cu 25at.％ Zr 50at.％ al 25at.％ Carry out phase identification to confirm that it is amorphous, such as diagram 2-1 shown. Put the sample in acetone, clean it with an ultrasonic cleaner for 1 minute, then take the sample out and put it in alcohol to continue ultrasonic cleaning for 15 minutes, and finally blow dry the surface of the sample with dry compressed nitrogen. Afterwards, put the sample into a tube furnace that has been heated to 250°C in advance, feed high-temperature oxygen with a water content of 30vol.%, the oxygen flow rate is 200ml / min, and the steam heating temperature is 110°C. After 10 hours of constant temperature, take it out for cooling . diagram 2-1 The XRD phase analysis of the sample after wet oxidation at 250°C for 10 hours shows that both the oxide layer and the alloy are amorphous. The element content distribution in the depth direction of the sample after oxidation is as follows: image 3 As shown in (a), it shows that t...

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Abstract

The invention provides a surface treatment method of a zirconium-based ternary amorphous alloy, which comprises the following steps: sequentially carrying out ultrasonic cleaning and drying surface pretreatment on the zirconium-based ternary amorphous alloy to obtain an amorphous sample with a relatively clean surface; and putting the clean amorphous sample into a heating furnace, introducing water-containing high-temperature oxygen into the heating furnace for wet oxidation, then taking out the sample, and cooling the sample. The temperature of the constant temperature condition is 250-350 DEG C. The oxidation time lasts for 1-24 hours. The flow rate of the introduced oxygen is 10-500ml / min. The water content ranges from 1 vol.% to 50 vol.%. A composite layer of an amorphous zirconium oxide layer, an amorphous aluminum zirconium oxide layer and a copper-rich crystal (Al4Cu9) layer is formed on the oxidized zirconium-based ternary amorphous surface, the adhesion of the composite layer and a matrix is good, the interior and the interface of the composite layer are free of defects such as pores and cracks, the surface performance is excellent, the process repeatability is high, and technical support is provided for application of the composite layer in the fields of automobiles, the nuclear industry and the like.

Description

technical field [0001] The invention provides a surface treatment method for a zirconium-based ternary amorphous alloy, which belongs to the technical field of materials. Background technique [0002] Zirconium-based ternary amorphous alloys have good glass forming ability, excellent mechanical properties, high thermodynamic stability and low thermal expansion coefficient. In recent years, they have been used in aerospace, military manufacturing, biomedical, electronic communications and chemical industries field has been widely used. However, due to its high chemical activity and easy reaction with oxygen, hydrogen, and water vapor, the application prospects of zirconium-based ternary amorphous alloys are limited. [0003] For metal materials with high chemical activity, two surface treatment methods are commonly used to reduce the influence of the external environment on the alloy matrix: one is to add metal or metalloid elements to the alloy, change the composition of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/12C23C8/16C23C8/02
CPCC23C8/12C23C8/16C23C8/02
Inventor 王祖敏马硕徐艺菲刘永长黄远马宗青
Owner TIANJIN UNIV
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