Comparison of the cyclic oxidation behavior of cold sprayed CuCrAl-coated and uncoated GRCop-84 substrates for space launch vehicles

Microstructure and Microhardness of Cold‐Sprayed CuNiIn Coating

“…This fact suggests that the particle inter- faces are still weak compared to the bulk inner particle. Therefore, it is expected that the post-spraying heat treatment can improve the Cu-Ni-In coating cohesion as found for Cu-Cr-Nb [13] and bronze [15] coatings.…”

“…Cu-Ni-In coatings have been fabricated by different techniques, such as physical vapour deposition (PVD), ion implantation [1] and thermal spraying. [2][3][4][5] Recently, the emerging cold spraying technique has attracted worldwide interest for its high deposition efficiency and volume production of many metallic coatings [6][7][8][9][10][11][12][13][14][15][16][17] and composites. [17] In some cases, even cermets, [17,18] nanostructured coatings [18,19] and functional ceramic layer [20] could be deposited by cold spraying.…”

“…Therefore, cold spraying is endowed with some unique characteristics as compared to the conventional thermal spraying processes, such as almost no oxidation and phase transformation occur. In some studies, Cu alloys, such Cu-Cr-Nb, [13] CuCrAl [14] and bronze [15] were also applied by cold spraying. Therefore, in this study, the deposition features of cold sprayed CuNiIn coatings were investigated for the first time.…”

Young's moduli of cold and vacuum plasma sprayed metallic coatings

“…In addition, the use of a suitable top coat to act as a thermal barrier can allow the engine to run at higher temperatures thereby resulting in its increased thermal efficiency. As a result, several types of ceramic [1,5] and metallic [10,11,12,13,14,15] coatings have been advocated as protective coatings for copper alloy liners. However, differences in the mechanical and thermophysical properties between the coatings and copper alloy substrates can lead to the development of large residual stresses and coating spallation as the coated liner experiences variations in temperature during processing and engine operation [16].…”

“…Recently, it was demonstrated that CuCrAl and NiCrAlY coatings deposited either by the cold spray (CS) or the vacuum plasma spray (VPS) techniques are potentially viable coatings for GRCop-84 combustion liners [14,15]. However, elastic moduli and thermophysical data for these sprayed coatings are either limited or nonexistent in the temperature range of interest for use in RLVs.…”