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a ti 68 zr 32 Alloy Thermal Oxidation Hydrogen Resistance Method

A thermal oxidation and alloy technology, applied in the field of thermal oxidation and hydrogen resistance, can solve unseen problems

Active Publication Date: 2017-02-15
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has been used to improve industrial pure titanium [5] and zirconium [6] Hydrogen barrier properties, but no thermal oxidation process applied to Ti 68 Zr 32 Alloy System Reports

Method used

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  • a ti <sub>68</sub> zr <sub>32</sub> Alloy Thermal Oxidation Hydrogen Resistance Method
  • a ti <sub>68</sub> zr <sub>32</sub> Alloy Thermal Oxidation Hydrogen Resistance Method
  • a ti <sub>68</sub> zr <sub>32</sub> Alloy Thermal Oxidation Hydrogen Resistance Method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Will Ti 68 Zr 32 The alloy is placed in an ultimate vacuum of 10 -3 In the tube vacuum furnace of Pa, vacuum to 10 -2 Pa or above, heat to 500°C, feed in pure oxygen (purity higher than 99.99%) at a pressure of 100kPa, oxidize for 12h, and slowly cool to room temperature at a rate of 20°C / h. Scanning electron microscope was used to observe the surface morphology and cross-sectional thickness of the oxide layer of the prepared sample. The results are as follows Picture 12 , 13 As shown, the visible oxide layer is dense without cracks. The hydrogen barrier performance in hydrogen at 400℃ and 2MPa pressure is as attached figure 1 As shown, it can be seen that the sample has no significant hydrogen absorption within 24 hours.

Embodiment 2

[0046] Will Ti 68 Zr 32 The alloy is placed in an ultimate vacuum of 10 -3 In the tube vacuum furnace of Pa, vacuum to 10 -2 Pa or above, heat to 500°C, feed in pure oxygen (purity higher than 99.99%) at a pressure of 1kPa, oxidize for 12h, and slowly cool to room temperature at a rate of 20°C / h. The hydrogen barrier performance in hydrogen at 400℃ and 2MPa pressure is as attached figure 2 As shown, the service life of the sample against hydrogen is about 6.5 hours.

Embodiment 3

[0048] Will Ti 68 Zr 32 The alloy is placed in an ultimate vacuum of 10 -3 In the tube vacuum furnace of Pa, vacuum to 10 -2 Pa or above, heat to 500°C, feed in pure oxygen (purity higher than 99.99%) at a pressure of 50kPa, oxidize for 12h, and slowly cool to room temperature at a rate of 20°C / h. The hydrogen barrier performance in hydrogen at 400℃ and 2MPa pressure is as attached image 3 As shown, the hydrogen-resistant service life of the sample is about 5.5 hours.

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Abstract

The invention aims to provide a thermal oxidization hydrogen resistance method of a Ti68Zr32 alloy. The thermal oxidization hydrogen resistance method is characterized by forming a compact and uniform hydrogen resistance oxidization film on the surface of the alloy, and specifically comprises the following technology: placing the cleaned Ti68Zr32 alloy with a polished surface into a tubular vacuum furnace with the final vacuum degree of 10<-3>Pa, vacuumizing to 10<-2>Pa above, heating to 450-550DEG C, introducing oxygen with the pressure of 1-150KPa, oxidizing for 1-12h, and cooling to room temperature at the speed of 10-30DEG C / h. The thermal oxidization hydrogen resistance method has the advantages of being simple in technology, low on the requirement of material shapes, fewer in external elements.

Description

Technical field [0001] The invention relates to a Ti 68 Zr 32 Alloy thermal oxidation resistance to hydrogen method. Background technique [0002] Ti 68 Zr 32 It is a common zero-based alloy used in neutron scattering sample chambers. The alloy was developed by Sidhu et al. of Argonne National Laboratory in the United States. [1] Found first. Because the neutron diffraction test of some samples needs to be carried out in a deuterium environment, the temperature of the sample chamber is as high as 400℃ during the test, and deuterium is an isotope of hydrogen, so how to prevent Ti 68 Zr 32 Hydrogen embrittlement under high temperature hydrogen environment is Ti 68 Zr 32 The key to universal application. [0003] Titanium and zirconium are both hydrogen absorbing elements, and will absorb hydrogen and generate hydrides in a corrosive environment containing hydrogen or hydrogen evolution. When the amount of hydride reaches a certain level, its impact toughness and elongation decrease ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/12
Inventor 陈德敏刘玉陈伟汪伟刘实吴二冬杨柯
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI