Fabrication of composite coatings using a combination of electrochemical methods and reaction bonding process

Effect of Fe2O3 doping on sintering of yttria-stabilized zirconia

“…A mixture of absolute ethanol (Et-OH, 99%, Sigma-Aldrich, UK) and acetylacetone (ACAC, 99%, Sigma-Aldrich, UK) with a molar ratio of 7:4 was used as solvent for all suspensions. 6 This mixture was referred as "the mixed solvent" throughout in this paper. HNO 3 (0.1 mol/L in distilled water) was used to adjust suspension pH.…”

“…The free standing green deposits were sintered at 1150 • C in ambient air for 2 h. It should be noted that a free standing (separated from the substrate) green deposit was used in this work to avoid constraint force on the coating imposed by the metallic substrate. 6 Before deposition, the mean primary particle size of 3YSZ, 8YSZ and Fe 2 O 3 was estimated using scanning electron microscope (SEM, XL30 FEG, Philips Netherlands). 150 particles were counted to estimate mean primary particle size.…”

“…The densification temperature of YSZ is around 1300 • C or higher. 6,7 Transition metal oxides (TMO) such as Fe 2 O 3 have been proven to be an effective sintering aid for densification of cubic phase 8YSZ (8 mol% yttria stabilized zirconia). [8][9][10][11][12][13] However, the densification mechanism and grain growth of Fe 2 O 3 doped 8YSZ are currently under debate.…”

Attrition milling of metallic-ceramic particles in acetyl-acetone

“…1,10 Furthermore, the sintering of Al 2 O 3 in the RBAO started from 1200 C, whereas sintering of YSZ/Al 2 O 3 in this study started at 1000 C. Nevertheless, the addition of Al in this study promoted the adhesion of the coating to the metal substrate and hindered the formation of cracks in the coatings, in a similar way to the discovery in our previous work. 5,6 Further study is needed to understand the mechanisms controlling the coating/ substrate bonding and crack formation.…”

Ceramic Coatings Obtained by Electrophoretic Deposition: Fundamentals, Models, Post-Deposition Processes and Applications

“…Aluminium particles were added to PSZ suspensions by Wang (Wang et al, 2000b;Wang et al, 2002). During heat treatment in air at low temperature (600°C), metal powder was converted to nanometer sized oxide crystals, that subsequently were sintered and bonded to PSZ at 1200°C.…”