Tailoring Aerogel for Thermal Spray Applications in Aero-Engines: A Screening Study
Table 6
Optimisation conditions and responses for the spray-drying process.
Treatment
Independent variables
Responses
Powder content (vol.%)
YSZ : aerogel
Dispersant (wt.%)
Binder (wt.%)
Inlet temperature (°C)
Atomization pressure (bar)
Feeding rate (ml/min)
D50 (μm)
Volume fraction
Uniformity
19
40
1 : 1
0.9
6
200
0.9
21
28.932 ± 0.726
64.450 ± 0.535
0.475 ± 0.002
20
40
1 : 1
0.6
6
200
1.0
21
24.478 ± 0.526
59.520 ± 0.751
0.481 ± 0.001
21
40
1 : 1
0.3
6
200
1.0
21
26.719 ± 0.271
63.090 ± 0.660
0.468 ± 0.004
Optimised treatment for YSZ-aerogel for maximum D50, volume fraction, and uniformity. Values of responses are reported by Mastersizer 2000E analyser in 3 significant figures. D50: median particle size.
