CMAS Corrosion Resistance of Y3Al5O12/Al2O3 Ceramic Coating Deposited by Atmospheric Plasma Spraying

Jie LI; Zhixin LUO; Yang CUI; Guangheng ZHANG; Luchao SUN; Jingyang WANG

doi:10.15541/jim20240001

Journals >Journal of Inorganic Materials >Volume 39 >Issue 6 >Page 671 > Article

Journal of Inorganic Materials
Vol. 39, Issue 6, 671 (2024)

CMAS Corrosion Resistance of Y₃Al₅O₁₂/Al₂O₃ Ceramic Coating Deposited by Atmospheric Plasma Spraying

Jie LI^1,2, Zhixin LUO¹, Yang CUI¹, Guangheng ZHANG^1,2..., Luchao SUN^1,* and Jingyang WANG^1,*|Show fewer author(s)

Author Affiliations

¹1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

²2. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

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DOI: 10.15541/jim20240001 Cite this Article

Jie LI, Zhixin LUO, Yang CUI, Guangheng ZHANG, Luchao SUN, Jingyang WANG. CMAS Corrosion Resistance of Y₃Al₅O₁₂/Al₂O₃ Ceramic Coating Deposited by Atmospheric Plasma Spraying [J]. Journal of Inorganic Materials, 2024, 39(6): 671 Copy Citation Text

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XRD patterns of the surfaces of YAG/Al2O3 coatings after CMAS corrosion at 1300 ℃ for (a) 1, (b) 4, and (c) 25 h Colorful patterns are available on website

1. XRD patterns of the surfaces of YAG/Al₂O₃ coatings after CMAS corrosion at 1300 ℃ for (a) 1, (b) 4, and (c) 25 h Colorful patterns are available on website

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Surface morphologies of YAG/Al2O3 coatings after CMAS corrosion

2. Surface morphologies of YAG/Al₂O₃ coatings after CMAS corrosion

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3. TEM analyses of YAG/Al₂O₃ coating annealed at 1100 ℃ after CMAS corrosion for 1 h

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4. Cross-sectional morphologies of YAG/Al₂O₃ coatings after CMAS corrosion

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5. TEM analyses of YAG/Al₂O₃ coating annealed at 1300 ℃ after CMAS corrosion for 4 h

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6. EDS mappings of the cross-section of YAG/Al₂O₃ coating annealed at 1100 ℃ after CMAS corrosion for 1 h

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7. EDS mappings of the cross-section of YAG/Al₂O₃ coating annealed at 1500 ℃ after CMAS corrosion for 1 h

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S1. High-magnification cross-section observations of YAG/Al₂O₃ coatings annealed at 1300 ℃ after CMAS corrosion for (a) 1, (b) 4, and (c) 25 h

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S2. High-magnification cross-section observations of YAG/Al₂O₃ coatings annealed at 1500 ℃ after CMAS corrosion for (a) 1, (b) 4, and (c) 25 h

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S3. Cross-section observations of (a) as-deposited YAG/Al₂O₃ coating and coatings annealed at (b) 1100, (c) 1300, and (d) 1500 ℃

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S4. Equivalent thickness statistics of precipitation YAG garnet-structure solid solution of coatings annealed at different temperatures

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Current/A	Ar flow rate/slpm	H₂ flow rate/slpm	Rotation velocity/%	Distance/mm
650	40	12	30	110

Table 1. Atmospheric plasma spraying parameters for YAG/Al₂O₃ coating

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Region	O	Mg	Al	Si	Ca	Y	Phase
E	43.12±4.00	6.84±0.22	3.49±0.30	21.96±1.32	24.59±2.26		Ca₂MgSi₂O₇
F	50.79±0.93	5.61±0.19	6.51±0.27	17.50±0.82	11.34±0.49	8.25±0.42	YAG
G	59.33±2.03	0.54±0.14	4.95±0.26	19.53±0.73	13.38±0.89	2.27±0.14	CMAS

Table 1. TEM-EDS results of the regions marked with letters E, F, and G in Fig. 5(c)(%, in atom)

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Region	O	Mg	Al	Si	Ca	Y	Phase
A	50.41±1.59	—	17.47±0.70	22.27±0.71	10.16±0.45	—	CaAl₂Si₂O₈
B	54.10±3.25	—	16.47±0.78	19.42±0.95	10.00±1.84	—	CaAl₂Si₂O₈
C	58.95±0.44	5.60±0.29	3.79±0.49	16.57±0.32	15.09±0.20	—	Ca₂MgSi₂O₇
D	39.07±1.11	3.70±0.34	17.29±0.53	17.48±0.52	12.41±0.50	10.06±0.62	YAG
E	49.54±1.04	3.23±0.40	4.73±0.18	23.34±0.41	13.81±1.60	5.34±0.71	CMAS

Table 2. SEM-EDS analytical results of the phases on the surface of YAG/Al₂O₃ coating annealed at 1100 ℃ after CMAS corrosion for 1 h (%, in atom)

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Region	O	Mg	Al	Si	Ca	Y	Phase
A	24.15±0.56	—	24.40±0.29	34.29±0.21	17.16±0.22	—	CaAl₂Si₂O₈
B	23.06±3.46	5.43±0.30	11.72±0.42	28.70±1.50	31.09±1.49	—	CMAS
C	18.45±2.17	3.63±0.42	8.98±0.70	35.71±1.30	20.57±0.38	12.67±0.82	YAG
D	26.70±2.79	2.13±0.61	29.42±0.78	14.12±1.62	10.47±0.54	17.18±0.81	YAG
E	31.18±1.51	1.40±0.17	10.56±0.53	31.3±0.53	21.09±0.73	4.47±0.14	CMAS

Table 3. SEM-EDS analytical results of phases in the cross-section of YAG/Al₂O₃ coating annealed at 1300 ℃ after CMAS corrosion for 4 h (%, in atom)

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