Comparative analysis of CoCrAlY coatings at high-temperature oxidation behavior using different reinforcement composition profiles

被引：26
|
作者：
Nithin, H. S. [1 ]
Nishchitha, K. M. [2 ]
Pradeep, D. G. [1 ,3 ]
Durga, C. Prasad [4 ]
Mathapati, Mahantayya [5 ]
机构：
[1] BGSCET, Bengaluru 560086, Karnataka, India
[2] Adichunchanagiri Univ, BGSIT, Javarana Hally 57144, Karnataka, India
[3] Malnad Coll Engn, Hassan, India
[4] RVITM, Bengaluru 560076, Karnataka, India
[5] KLECET, Chikodi 591201, Karnataka, India
来源：
WELDING IN THE WORLD | 2023年 / 67卷 / 03期
关键词：
Plasma spray; CoCrAlY; Carbides; Oxides; High-temperature oxidation; PERFORMANCE; CORROSION;
D O I：
10.1007/s40194-022-01405-2
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The oxidation behaviour of plasma-sprayed carbides and oxides reinforced composite CoCrAlY coatings at 700 degrees C was examined in this paper. CoCrAlY was reinforced with Al2O3 + YSZ, CeO2, WC-Co, Cr3C2-NiCr individually to produce four different coatings. SEM, EDS, and XRD are used to analyse the oxide scales formed during the oxidation process on the surface of the coating. From the results, it is found that all of these coatings had a parabolic weight gain, suggesting the existence of a shielding oxide scale on the surface, whereas changes in total weight gain are observed. The oxidation resistance of CoCrAlY + Al2O3 + YSZ coating is better and exhibits 28% less weight gain than other coatings. During oxidation, coating shows slow scale growth of kinetics due to thermodynamically stable Al2O3. The CoCrAlY + 2% CeO2 coating showed the lowest oxidation resistance of all the coatings.
引用
收藏
页码：585 / 592
页数：8
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