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将Mg-9%Al-3%Ca合金加热到700℃,当表面氧化膜形成后,冷却至室温,去除表面氧化膜,制成经过氧化的Mg-9%Al-3%Ca合金,然后再次加热,氧化生成氧化膜,并对其进行扫描电镜分析和高温氧化动力学研究。结果表明,经过氧化后的合金再生的氧化膜光滑平整、致密;在温度为400、600、700℃时,经过氧化的合金的恒温氧化动力学曲线遵循抛物线规律。说明Mg-9%Al-3%Ca合金表面氧化膜有良好的再生能力。
The Mg-9% Al-3% Ca alloy was heated to 700 ° C. After the surface oxide film was formed, it was cooled down to room temperature and the surface oxide film was removed to prepare an oxidized Mg-9% Al-3% Ca alloy. Heated, oxidized to form oxide film, and its scanning electron microscopy and high temperature oxidation kinetics. The results show that the oxidized films are smooth and dense, and the oxidation kinetics of the oxidized alloys follow the parabolic law at 400, 600 and 700 ℃. Indicating that Mg-9% Al-3% Ca alloy surface oxide film has good regeneration ability.