Abstract:The oxidation of Ti60 alloy (Ti-5.6A1-4.8Sn-2.OZr-1.OMo-0.85Nd-0.34Si) has been investigated. Thermodynamic and dynamic laws were studied by means of calculating the oxidation weight gain, oxidation rate constants and activities. The microstructure and morphology of oxidation scales on surface were examined with XRD and SEM. The element profile along oxidation layer was studied by AES to understand the diffusion behavior. The results indicate that Ti60 alloy exhibited the parabolic rule of oxidation rate at 650℃ and 700℃, but obeyed the parabolic-linear rule at 750℃, The oxidation scales are composed of TiO2 and A12O3. The morphology of oxidized surface possesses grill-like structure because α phase, β phase, and α/β interface are different in oxidation rate. Oxidation of rare earth phases is more serious than that of substrate.
贾新云, 刘培英, 陶冶. Ti60合金在650~750℃高温下的氧化行为[J]. 材料工程, 2003, 0(6): 18-22.
JIA Xinyun, LIU Peiying, TAO Ye. Oxidation Behavior of Ti60 Alloy at 650-750℃. Journal of Materials Engineering, 2003, 0(6): 18-22.
[1] 崔文芳等. IMI834和Ti-1100在550~700℃高温下的氧化行为[J]. 稀有金属材料与工程,1997(2):31-35. [2] LEYENS C, et al. Oxidation Behavior of Near-α Titanium Alloys and their Protection by coatings[A].In:Titanium′95 Science and Technology[C]. 1996:1935-1942. [3] LEYENS C, et al. Oxidation and Protection of Near-Alpha Titanium Alloys[J]. Materials Science Forum,1997(251-254):769-776. [4] 崔文芳等. 氧在Ti-1100高温钛合金氧化中的扩散规律[J]. 东北大学学报,1998(1):19-22.