摘要
通过添加Ca到Mg 9%Al合金中,提高了该合金的燃点。扫描电镜分析表明,合金表面生成了由MgO、CaO及Al2O3组成的复合氧化膜。通过氧化动力学试验分析,添加Ca后,该合金的表面氧化膜的生长遵循抛物线规律,具有保护作用,但所生成的氧化膜的力学性能不高,容易发生开裂,甚至剥落。
By adding some Ca, the ignition temperature of Mg-9%Al alloy was increased. The results of SEM analysis indicated that the composite oxide film composed of MgO, CaO and Al2O3 was formed. Thermo-gravimetric measurements revealed that the oxidation dynamics curve follows the parabolic-line law. The oxide film is protective. But the mechanical properties of it are lower, which is prone to crack, even to flake off.
出处
《铸造》
EI
CAS
CSCD
北大核心
2005年第2期141-143,共3页
Foundry
基金
国家自然科学基金(50271055)
航空科学基金(01G53048)
高校博士点基金(20020699018)资助课题。
关键词
镁合金
氧化膜
氧化动力学
抛物线规律
magnesium alloy
oxide film
oxidation kinetics
parabolic-line law
