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Investigation of slurry erosion-corrosion behavior of Ta(Si1?xAlx)2 nanocrystalline coatings
Xu J1; Xie QW1; Peng S1; Li ZY(李正阳)2; Jiang SY3
Source PublicationMaterials Research Express
2020-02-01
Volume7Issue:2Pages:026408
Abstract

Abstract To enhance the erosion-corrosion resistance of titanium alloys, two Ta(Si1?xAlx)2 coatings with different Al content were deposited on Ti?6Al?4V alloy by double cathode glow discharge method. The coatings consist of single hexagonal C40 structured TaSi2 phase, which forms an equiaxed grain structure with an average diameter of ~5 nm. Al addition was found to enhance the values of H/E and adhesive strength between the substrate and coating. The erosion–corrosion behavior of the coatings was studied in a liquid–solid acid slurry flow (specifically a medium of 5 wt% HCl solution that contained a 10 wt% concentration of silica-based sand) using electrochemical measurements, weight loss tests and SEM observation. The results indicated that the ternary Ta(Si0.875Al0.125)2 coating provided better protection, compared to the binary TaSi2 coating, against the combined attack of mechanical erosion and electrochemical corrosion in a liquid–solid acid slurry flow. This is attributable to high self-healing ability of the surface passive film and a higher H/E ratio.

Keyworderosion-corrosion refractory metal silicides slurry flow EIS mechanical properties
DOI10.1088/2053-1591/ab6f39
Indexed BySCI ; EI
Language英语
Ranking4
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81454
Collection先进制造工艺力学实验室
Affiliation1.Department of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, People’s Republic of China
2.Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
3.Department of Mechanical Engineering, Southeast University, 2 Si Pai Lou, Nanjing 210096, People’s Republic of China
Recommended Citation
GB/T 7714
Xu J,Xie QW,Peng S,et al. Investigation of slurry erosion-corrosion behavior of Ta(Si1?xAlx)2 nanocrystalline coatings[J]. Materials Research Express,2020,7(2):026408.
APA Xu J,Xie QW,Peng S,Li ZY,&Jiang SY.(2020).Investigation of slurry erosion-corrosion behavior of Ta(Si1?xAlx)2 nanocrystalline coatings.Materials Research Express,7(2),026408.
MLA Xu J,et al."Investigation of slurry erosion-corrosion behavior of Ta(Si1?xAlx)2 nanocrystalline coatings".Materials Research Express 7.2(2020):026408.
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