Characterization of the closed porosity in plasma-sprayed alumina
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- ILAVSKY, J., ALLEN, A.J., LONG, G.G. et al. Journal of Materials Science (1997) 32: 3407. doi:10.1023/A:1018616632261
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The porous phase of plasma-sprayed alumina was characterized using mercury intrusion porosimetry, water immersion methods, and small-angle neutron scattering. A comparison of the results shows that the intrusion techniques did not yield a full porous phase characterization. It has been found that while the amount of closed porosity was 1.4%(±0.5%) of the sample volume, this volume accounted for only 60% of the total internal surface area. The smallest void diameter was found to be 10 nm.