Open AccessEffects of plasma surface Ta alloying on the tribology behavior of γ-TiAl
Author(s) -
Dongbo Wei,
Xuan Zhou,
F.-K. Li,
M.-F. Li,
S.-Q. Li,
P.-Z. Zhang
Publication year - 2021
Publication title -
journal of mining and metallurgy. section b, metallurgy/journal of mining and metallurgy. section b, metallurgy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.42
H-Index - 20
eISSN - 2217-7175
pISSN - 1450-5339
DOI - 10.2298/jmmb200617002w
Subject(s) - materials science , tribology , abrasive , alloy , layer (electronics) , adhesive wear , metallurgy , surface layer , wear resistance , friction coefficient , lubricity , deposition (geology) , diffusion , composite material , paleontology , physics , sediment , biology , thermodynamics
To improve the wear resistance of ?-TiAl alloy, Ta alloy layer was prepared on surface by double glow plasma surface alloying technique. The tribology behavior of Ta alloy layer against Si3N4 at 25?, 350? and 500? were comparatively studied. The results showed that Ta alloy layer comprised a deposition layer and a diffusion layer. The deposition layer played a role in protection as a soft film. With the increase of temperature, the wear mechanism of ?-TiAl changed from abrasive wear to coexistence of abrasive wear and oxidation wear. Ta alloy layer?s wear mechanism changed from adhesive wear to coexistence of adhesive wear and oxidation wear. Surface Ta alloying process significantly reduced the wear volume, the specific wear rate and the friction coefficient of ?-TiAl and improved the wear resistance properties of ?-TiAl.