Microstructural, thermal and mechanical properties of HVOF sprayed Ni–Al-based bond coatings on stainless steel substrate

An evaluation of plasma-sprayed coatings based on Al2O3 and Al2O3–13wt.% TiO2 with bond coat on pure titanium substrate

“…The physical bonding is a result of particle adhesion to the substrate by Van Der Waals forces. Cohesive strength depends on the roughness, temperature difference and bond/cohesive strength of the previously coated surface [26]. It was observed that the bond coat increased the surface roughness, because of the particle sizes of bond coat powders being relatively large.…”

Thermal spraying of transition metal aluminides: An overview

“…As well as in FeAl, ceramic particles have also been used in a NiAl matrix in order to improve erosion properties at high temperatures [115,116]; such studies conclude that the erosion behaviour of the HVOF NiAle40Al 2 O 3 coatings were found to be less sensitive to the test temperature and impact angle as compared with chromium carbide cermet coatings. Interestingly, Wang et al [115] reported that NiAleAl 2 O 3 eTiC materials exhibited an excellent self-lubricating property in the range of 700e900 C, higher than at 600 C. The improved wear performance is attributed to the formation of 1e2 mm protective oxide layer [117]. In addition, as with FeAl intermetallic coatings, a-alumina, nickel spinels and haematites were formed as oxidation products when HVOF NiAl coatings were oxidized [118].…”

Mechanical properties of flame sprayed free-standing coatings

“…is testing the composite, i.e. coating with substrate and the application of indentation methods [15,19,[23][24][25]27,28,[35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51]. Hereby the non-trivial interaction between substrate and coating has to be taken into account.…”