Thermal spraying of ceramics

Studies of the microstructure and properties of dense ceramic coatings produced by high-velocity oxygen-fuel combustion spraying

“…The feedstock characteristics were different for the two cases to allow for the different melting characteristics within a high-temperature plasma compared to those within a combustion flame. As indicated in Table 1, a small particle size 1 Information on commercial products is given for completeness and does not necessarily constitute or imply their endorsement by the National Institute of Standards and Technolog. [20][21][22][23][24][25][26][27][28][29][30] was required in the HVOF case in order to give sufficient heating of the material to ensure melting and efficient deposition.…”

“…DC-arc plasma spray is an established process for depositing a wide range of oxide ceramics, including alumina for wear resistance and zirconia-based materials for thermal barrier coatings [1][2][3][4]. The high temperature (enthalpy) availability within the thermal plasma enables melting, relatively high-velocity delivery and deposition of ceramics onto a variety of substrates.…”

Preparation and characterization of nanostructured Al2O3-13wt.%TiO2 ceramic coatings by plasma spraying

“…Because of their high wear resistance, excellent corrosion resistance, high temperature resistance, and good chemical stability, ceramic materials are used a lot in the application of coatings on metal surfaces [1]. Plasma spraying is one of the most appropriate techniques for the deposition of ceramic coatings, since the temperature reached in the plasma is very high (above 18000°C), and there is little risk of distortion of the base material (the substrate temperature does not over 300°C) [1][2][3].…”

Statistical Analysis of the Flexural Strength of Free-Standing Flame-Sprayed Alumina Coatings Prior and After Thermal Shock

“…2. The derived characteristic strength of the B3B-tests was transformed according to the effective surface area for four-pointbending bars of 3 9 5945 mm 3 The mean effective surface area S eff of the B3B-discs was calculated using a FEM-model with specimen diameter and mean specimen thickness (Ref 13). Thus, the surface-related characteristic strength of both other bending tests r b is given by:…”