The effect of yttrium incorporation on the formation and properties of α-Al2O3 coatings

被引：3
作者：
Lin, Yuebin [1 ,2 ]
Zhu, Yufu [1 ]
Zhu, Weiguo [3 ]
机构：
[1] Huaiyin Inst Technol, Jiangsu Prov Key Lab Intervent Med Devices, 1 Meicheng St, Huaian 223003, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, 29 Yudao St, Nanjing 210016, Peoples R China
[3] Huaiyin Inst Technol, Jiangsu Prov Key Lab Digital Mfg Technol Lab, 1 Meicheng St, Huaian 223003, Peoples R China
来源：
SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS | 2017年 / 24卷 / 02期
关键词：
alpha-Al2O3 seed crystals; double glow plasma technique; rare earth elements; HYDROGEN PERMEATION BARRIER; THIN-FILMS; AL2O3; DEPOSITION; OXIDATION; MICROSTRUCTURE; TEMPERATURE; MECHANISMS; DIFFUSION; CORROSION;
D O I：
10.1515/secm-2015-0263
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
The Al layer with alpha-Al2O3 seed crystals and the rare earth element Y were deposited directly onto a 316L stainless steel substrate and then oxidized at a temperature as low as 580 degrees C using the double glow plasma technique. The complex Al target material containing 10 wt% alpha-Al2O3 seed crystals and 10 wt% Y was used in the experiment. The results indicated that the coatings were very dense and uniform. The field emission transmission electron microscopy observation indicated that element Y was discontinuously distributed, which was mainly concentrated at the grain boundary of the coating. After plasma oxidation, Y was oxidized to Y2O3. Under the action of coupled multiple factors (ion bombardment, alpha-Al2O3 seed crystals, and rare earth element Y), the AlY alpha oxide coatings contained large amounts of alpha-Al2O3 crystals. The increase of the Y content improved the adhesive force of the coatings. The corrosion current of the oxide coatings was reduced by three orders of magnitude.
引用
收藏
页码：309 / 316
页数：8
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