A microstructure and mechanical property investigation on thermally sprayed nanostructured ceramic coatings before and after a sintering treatment

In situ nanostructured ceramic matrix composite coating prepared by reactive plasma spraying micro-sized Al–Fe2O3 composite powders

“…It is well known that the non-equilibrium plasma spraying process is characterized by high temperatures (∼10,000 K), high velocity (about 200 m s −1 ) and extremely high cooling rate (about 10 6 -10 8 K s −1 ) [6,14,22]. Therefore, the reaction products (FeAl 2 O 4 , Al 2 O 3 and Fe), which were also reported in other non-equilibrium processing of Al-Fe 2 O 3 thermite system [25][26][27][28], were different from that of the equilibrium reaction condition (Al 2 O 3 and Fe).…”

“…Relative toughness of the coatings were expressed by crack extension force (Gc) calculated from Eq. (1) [22]:…”

Fabrication, microstructure and abrasive wear characteristics of an in situ tantalum carbide ceramic gradient composite

“…In all of these applications, the satisfactory performance of the gradient composites depends on the processing strategies adopted and the resulting microstructure. In recent years, gradient composites have been produced by various processing techniques such as laser cladding [8][9], plasma spraying [10][11], magnetron sputtering [12][13], powder metallurgy [14], and centrifugal casting [15]. However, most of them are secondary processes on the moulding surface, so various shortcomings limit their application, such as excessive energy consumption, severe deformation, and inferior metallurgical combination.…”

Amorphous zones in flame sprayed alumina–titania–zirconia compounds

“…Amorphous regions near the coating-substrate interface are discussed in Refs. [8,[12][13][14] and amorphous sub-lamellae in the system hydroxyapatite (HA) are presented in Refs. [15,16].…”