<trans-title>Effects of Impurities on Properties of YSZ Thermal Barrier Coatings</trans-title>

Table 1. Chemical composition of YSZ raw materials (wt%)
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Table 1. Chemical composition of YSZ raw materials (wt%)
ZrO₂ HfO₂ TiO₂ SiO₂ MgO Fe₂O₃
90.28 1.55 <0.01 <0.01 <0.01 <0.01
Y₂O₃ Al₂O₃ CaO Na₂O K₂O
7.92 0.011 <0.01 <0.01 <0.01

Table 2. Design composition (D) of YSZ powders and measured composition (M) of YSZ coatings (wt%)

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Table 2. Design composition (D) of YSZ powders and measured composition (M) of YSZ coatings (wt%)

No.	SiO₂		No.	Al₂O₃		No.	Fe₂O₃
No.	D	M	No.	D	M	No.	D	M
HP	<0.01	<0.01	—	<0.01	<0.01	—	<0.01	0.0049
S1	0.02	0.013	A1	0.02	0.014	F1	0.02	0.0140
S2	0.06	0.038	A2	0.06	0.030	F2	0.06	0.0390
S3	0.10	0.064	A3	0.10	0.051	F3	0.10	0.0800
S4	0.16	0.110	A4	0.15	0.079	F4	0.16	0.1100
S5	0.20	0.150	A5	0.20	0.120	F5	0.20	0.1400
S6	0.36	0.260	A6	0.35	0.230	F6	0.36	0.3000
S7	0.50	0.320	A7	0.50	0.300	F7	0.50	0.3400
S8	0.66	0.430	A8	0.65	0.380	F8	0.66	0.4600
S9	0.80	0.550	A9	0.80	0.450	F9	0.80	0.5700
S10	1.00	0.620	A10	1.00	0.640	F10	1.00	0.5900

Table 3. Parameters of HVOF process
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Table 3. Parameters of HVOF process
Coal oil/(L·h^-1) O₂/(L·min^-1) Ar (Carrier gas) /(L·min^-1) Powder feeding rate/(g·min^-1) Distance/mm
26 900 8 75 380

Table 4. Parameters of APS process
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Table 4. Parameters of APS process
Current/A Voltage/V Power/kW Distance/mm
620 76 47 100
Ar/(L·min^-1) H₂/(L·min^-1) Ar(Carrier gas)/ (L·min^-1) Powder feeding rate/(g·min^-1)
38 13 4.5 30

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Xiaojuan JI, Yueguang YU, Xiaoliang LU. Effects of Impurities on Properties of YSZ Thermal Barrier Coatings[J]. Journal of Inorganic Materials, 2020, 35(6): 669

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