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Thermal oxidization hydrogen resistance method of Ti68Zr32 alloy

A technology of thermal oxidation and alloying, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve problems such as unseen

Active Publication Date: 2015-01-14
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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  • Thermal oxidization hydrogen resistance method of Ti68Zr32 alloy
  • Thermal oxidization hydrogen resistance method of Ti68Zr32 alloy
  • Thermal oxidization hydrogen resistance method of Ti68Zr32 alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Ti 68 Zr 32 The alloy is placed in an ultimate vacuum of 10 -3 Pa tube vacuum furnace, vacuum to 10 -2 Above Pa, heat to 500°C, feed pure oxygen (purity higher than 99.99%) at a pressure of 100KPa, oxidize for 12 hours, and slowly cool to room temperature at a rate of 20°C / h. The surface morphology and cross-sectional thickness of the oxide layer of the prepared samples were observed by scanning electron microscopy, and the results were as follows: Figure 12 , 13 It can be seen that the oxide layer is dense and without cracks. At 400°C, the hydrogen barrier performance in 2MPa pressure hydrogen gas is as attached figure 1 As shown, it can be seen that the sample did not see obvious hydrogen absorption within 24 hours.

Embodiment 2

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

Embodiment 3

[0048] Ti 68 Zr 32 The alloy is placed in an ultimate vacuum of 10 -3 Pa tube vacuum furnace, vacuum to 10 -2 Above Pa, heat to 500°C, feed pure oxygen (purity higher than 99.99%) at a pressure of 50KPa, oxidize for 12 hours, and slowly cool to room temperature at a rate of 20°C / h. At 400°C, the hydrogen barrier performance in 2MPa pressure hydrogen gas is as attached image 3 As shown, the anti-hydrogen 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 present invention relates to a kind of Ti 68 Zr 32 Alloy thermal oxidation hydrogen resistance method. Background technique [0002] Ti 68 Zr 32 It is a common zero-based alloy used in the neutron scattering sample chamber, which was developed by Sidhu et al. of the Argonne National Laboratory in the United States [1] Be the first to spot. Since the neutron diffraction test of some samples needs to be carried out in a deuterium environment, in some cases the temperature of the sample chamber is as high as 400°C during the test, and deuterium is an isotope of hydrogen, so how to prevent Ti 68 Zr 32 Hydrogen embrittlement in high temperature hydrogen environment is Ti 68 Zr 32 The key to universal application. [0003] Both titanium and zirconium are hydrogen-absorbing elements, which will absorb hydrogen and generate hydrides in hydrogen-containing or hydrogen-evolving corrosion environments. When the amount of hydride reaches a certain le...

Claims

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Application Information

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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