Study on Regeneration Ability of Oxidation Film on Ignition-Proof Magnesium Alloy Added with RE

The ZM5-0.1%RE magnesium alloy was heated to 800°C, when the surface oxide film was formed, the ZM5-0.1% RE Magnesium alloy which had being oxidized obtained by removing the surface oxidation film on the ZM5-0.1%RE magnesium alloy at room temperature. TGA curve, oxidaxion kinetics curves at constant temperatuers of the alloy and XRD spectrum of the surface film were analyzed in order to investigate the sureface oxidation behavior.The results show that the alloy still has anti-oxidation performance, And the oxide inerease occurred mostly between 400°C and 700°C，a layer of tight oxide film with 4-5.5um and composed of RE2O3, MgO, Al2O3and Mg17Al12was formed on the surface of magnesiurn alloy. The tight surface oxide film prevented the further oxidation of the base magnesiurn alloy, It show that the regeneration ability of oxidation film on ZM5-0.1%RE Magnesium Alloy was good.

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Sputtering Technique to Fabricate Smooth Surface Oxide Film for Room Temperature Bonding

10.1109/ltb-3d53950.2021.9598432 ◽

2021 ◽

Author(s):

T. Saito ◽

T. Hanasaki ◽

T. Moriwaki ◽

T. Goto ◽

A. Takeda ◽

...

Keyword(s):

Oxide Film ◽

Smooth Surface ◽

Room Temperature ◽

Surface Oxide ◽

Surface Oxide Film

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Breakaway Behavior of Surface Oxide Film on Aluminum-Silicon-Magnesium Alloy Powder Particles at High Temperature in a Vacuum

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.42.1373 ◽

2001 ◽

Vol 42 (7) ◽

pp. 1373-1379 ◽

Cited By ~ 10

Author(s):

Atsushi Kimura ◽

Katsuyoshi Kondoh ◽

Masahiro Shibata ◽

Ryuzo Watanabe

Keyword(s):

High Temperature ◽

Magnesium Alloy ◽

Oxide Film ◽

Alloy Powder ◽

Surface Oxide ◽

Surface Oxide Film ◽

Powder Particles ◽

Aluminum Silicon

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Effect of Surface Oxide Films on Degradation of Titanium

Materials Science Forum ◽

10.4028/www.scientific.net/msf.539-543.3649 ◽

2007 ◽

Vol 539-543 ◽

pp. 3649-3654 ◽

Cited By ~ 1

Author(s):

Kenzo Asaoka ◽

Kunimitsu Maejima

Keyword(s):

Oxide Film ◽

Surface Film ◽

High Vacuum ◽

Ambient Air ◽

Surface Oxide ◽

Chemical Degradation ◽

Surface Films ◽

Vacuum Vessel ◽

Mixed Solution ◽

Surface Oxide Film

Thermal desorption spectroscopy (TDS) was applied to measure the hydrogen in titanium (Ti). Because fracture by hydrogen embrittlement for medical/dental devices of Ti and Ti alloys was reported, dependence of surface oxidation film on hydrogen absorption and desorption behaviors of cp-Ti was carried out. To form the surface oxide film (rutile), the Ti wire samples were annealed in an ambient air at 800oC for 2 hours. Half of the specimens were immersed in a mixed solution of NaF and H3PO4 (APF). The part of the specimens were removed the surface films by abrasion after the heat and the immersion in the APF solution. TDS analysis was applied to detect released ions/molecules during heating from room temperature to 1200oC in a high vacuum vessel for the TiH2 powders, the Ti samples with and without the above treatments. High ion intensity was detected for hydrogen (m/z = 2), and ion intensities of the other ions/molecules were almost the background level in measurements. The concentration of hydrogen in the samples related with heat and chemical process was determined quantitatively, and was not significantly increased by the annealing and the immersion in APF solution if the sample had the tough surface film. However, the sample, which had been removed the surface films before the immersion in APF, showed typical chemical degradation after the immersion in APF for 7 days, that is, high ion intensities of hydrogen, fluoride, water and hydroxyl ions were detected. It was concluded that the control of the surface oxide film on the medical/dental Ti devices is important in determining its longevity.

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