Liquid-phase siliconizing by Al–Si alloys at the surface of a TiAl-based alloy and improvement in oxidation resistance

Si-modified aluminide coatings deposited on Ti46Al7Nb alloy by slurry method

“…The layer was made up both by TiAl system phases and titanium silicide grains. The ternary Ti 7 Al 5 Si 12 phase has been detected as well [11].…”

Microstructure evolution and oxidation resistance of silicon-aluminizing coating on γ-TiAl alloy

“…Thus, taking into account the favorable effect of both elemental Al and Si on the improvement in the oxidation resistance of ␥-TiAl, co-deposition of Al and Si to form oxidation-resistant coatings might be a good choice. Several researches had investigated on the co-deposition of Al and Si on ␥-TiAl alloy such as preparation of Al-Si diffusion coating by Arc-PVD by Swadzba [23,24], pack cementation by Al and Si by Xiang [25,26], and liquid-phase siliconizing by Al-Si alloys by Xiong [27][28][29]. The results showed that the Al-Si diffusion coating could improve the oxidation resistance of the bare alloy significantly.…”

Improvement of oxidation resistance of TiAl6V4 alloy by siliconizing from liquid phase using melts with high silicon content

“…This phase is also formed in aluminium melts containing 5 and 10 wt.% of silicon, as documented in [1][2][3][4]. The growth rate of silicide-aluminide layers is a parabolic function; the rate constant for melts AlSi20 and AlSi28 expressed in m 2 /s was determined as: kAlSi20 = 22.344 exp −227, 412.8 RT and kAlSi28 = 7, 936, 635 exp −329, 741 RT .…”