论文标题
通过等离子体处理的新型紧凑型SI-B-N屏障
A Novel Compact Si-B-N Barrier on Mg-Li Alloys via Plasma Treatment
论文作者
论文摘要
MG-LI合金由于其出色的特性引起了很多关注。但是，改善其下氧化和耐腐蚀性是一个巨大的挑战。我们报告了一种沉积在MG-9.6LI合金表面上的新型Si-b-N陶瓷膜，作为抗氧化和腐蚀的有效屏障。通过使用N2-B2H6-SIH4气体混合物的血浆增强化学蒸气沉积来沉积膜，显示紧凑的结构和合金表面的粘合剂附着。障碍物显示出极好的保护氧化500天，在3.5 wt。％NaCl溶液的沉浸式测试中未发现可观察到的变化10分钟。上氧化和耐腐蚀性归因于通过等离子体处理具有紧凑结构的Si-b-N涂层的出色材料特性。此外，发现源气体混合物中B_2 H_6的比例中等比例有益于对合金的保护，在这种合金中，氢释放反应几乎消失了，在沉浸式测试中表面没有产生气泡。
Mg-Li alloys have attracted much attention due to their superior properties. However, it is a great challenge to improve their inferior oxidation and corrosion resistance. We report a novel Si-B-N ceramic film deposited on the Mg-9.6Li alloy surface as an effective barrier against oxidation and corrosion. The films were deposited by using plasma enhanced chemical vapor deposition from a N2-B2H6-SiH4 gas mixtures, showing compact structure and adhesive attachment to the alloy surface. The barrier revealed excellent protection against oxidation in humid air for 500 days, and no observable changes were found in immersion test of the 3.5 wt.% NaCl solution for 10 min. The superior oxidation and corrosion resistance are attributed to the excellent material property of Si-B-N coatings with compact structure via plasma treatment. Moreover, it is found that moderate proportion of B_2 H_6 in the source gas mixture is beneficial to the protection of alloys, where the hydrogen release reaction nearly disappeared and no bubbles were generated on the surface in the immersion test.
