Nanostructured alumina coatings manufactured by air plasma spraying: Correlation of properties with the raw powder microstructure

In-situ fabrication of amorphous/eutectic Al2O3–YAG ceramic composite coating via atmospheric plasma spraying

“…The Al 2 O 3 coatings are considered to be the typical representative of oxide ceramic coatings [4]. The previous studies were focused on the strength-toughness enhancement of the Al 2 O 3 coatings, including porosity control [5], metal phase addition [6], other oxide solution [7][8][9], structure nano-crystallization [10], component or structure gradient [11] and post processing [12]. However, some problems exist in the above-mentioned property improvement methods: (1) limited effects of porosity change; (2) obviously decreased hardness and strength of the coating due to the metal phase addition;…”

Deposition of nanostructured YSZ coating from spray-dried particles with no heat treatment

“…Furthermore, previous studies [14][15][16] have also elucidated that extraordinary properties can be obtained with a nanostructure closer to its original size (especially less than 100 nm). It is necessary to control the starting nano-crystal size of the agglomerates and their heat trajectories carefully in the plasma jet [17,18]. Many investigations have been completed to connect jet temperature with coating microstructures by studying the effects of spray processing parameters [19].…”

Effect of TiO 2 addition on the microstructure and nanomechanical properties of Al 2 O 3 Suspension Plasma Sprayed coatings

“…Some example of nanostructured ceramic coatings obtained by APS from agglomerated powders include alumina [16,17], titania [18,19], alumina-titania [14,20], yttria-stabilised zirconia [21,22] or pyrochlore [23].…”