Tribological properties of thermal-sprayed Magnéli-type coatings with different stoichiometries (TinO2n−1)

摘要: Abstract This paper summarizes results on the possibility of coating aluminium with titania-based Magneli-type coatings by thermal spraying, as well tribological properties these coatings. For this purpose, a spray powder defined phase composition was applied AlMg substrates atmospheric plasma spraying. Crystalline Magneli phases type Ti n O 2 −1 crystallographic shear structure could be identified after spraying in means X-ray diffraction. Dry sliding experiments were conducted high-temperature pin-on-disc test rig against polycrystalline alumina at 23 and 400°C up to distance 2000 m 1 m/s. The coefficient friction (COF) remains high, between 0.7 0.8 for all tests. best wear are achieved 6 11 coatings, showing rates down 1.2×10 −6 mm 3 /N m. behaviour sprayed indicates strong anti-wear under dry conditions. Under mixed/boundary-lubricated conditions, interaction low-additive polyalkyleneglycol (PAG100) very low coefficients range 10 −10