Cyclic Oxidation Behaviors of TiAl–Nb–Si-Based Alloys

Kim, Dae-Jin; Seo, Dongyi; Kim, Seong-Woong; Kim, SeungEon; Keum, D. Y.; Hong, Jae‐Keun

doi:10.1007/s11085-016-9644-x

Cited by 7 publications

(2 citation statements)

References 18 publications

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“…γ-TiAl alloys are widely used in aero engines and automotive components due to the outstanding creep properties (more than 900 °C), high melting point which is more than 1450 °C, and the preeminent specific modulus that is around 160 GPa to 180 GPa [1]. However, γ-TiAl alloys are limited to apply in industry because of inadequate oxidation resistance [2][3][4][5][6] . Therefore, a lot of researches were carried out to enhance the property of oxidation resistance.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C

et al. 2019

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In this study, an Al-Y coating was applied to enhance the property of oxidation resistance on the surface of γ-TiAl alloys by rf magnetron sputtering. The isothermal oxidation tests were investigated at 900 °C for 100 h. The coating characteristics and microstructure of coating after isothermal oxidation were inspected by XRD and SEM methods respectively, and coating bonding strength was investigated by scratch tester. Results show that Al 2 O 3 and Y 2 O 3 were produced on the surface of γ-TiAl alloys to enhance oxidation resistance during the isothermal oxidation test. Diffusion layer with rich element of Al provides abundant Al to surface for formation of a continuous Al 2 O 3 layer which increases oxidation resistance effectively. Oxides of YAlO 3 and YAG were formed during the oxidation tests, which were beneficial for the strength, hardness and fracture toughness of crystal grain of Al 2 O 3. Furthermore, Element of Ti diffused into surface from substrate was restrained by Al because of the formation of TiAl 3 and TiAl, which avoid the layer-broken by titanium oxides with porous structure

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Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C

et al. 2019

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“…In summary, the oxidation behavior of TiAl alloys depends on the alloy's composition, microstructure, and surface treatment, among other factors [15,17,28] . These factors all affect the oxidation resistance, however, no systematic studies have been carried out in terms of oxidation kinetics, spalling form and delamination characteristics of oxide film.…”

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confidence: 99%

High-temperature oxidation behavior of a cast Ti-47.5Al-2.5V-1.0Cr-0.2Zr alloy

et al. 2022

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TiAl alloys have the advantageous properties of high specific strength, high specific stiffness, and excellent oxidation resistance, which have been utilized for turbine blades in aircraft engines and automobile engines [1][2][3] . The blades are used in high-temperature conditions, with oxidation resistance being one of the important indices in determining its application potential. TiAl alloys can exhibit good oxidation resistance after long-term thermal exposure at 700 °C [4] . But, when the temperature exceeds 800 °C, the continuous and dense Al 2 O 3 protective oxide film cannot be generated on the surface, and instead a mixed oxide consisting of TiO 2 and Al 2 O 3 is formed. TiO 2 has a loose structure and large oxygen permeability, which cannot prevent the diffusion of O atoms, resulting in insufficient oxidation resistance; thus, restricting their further application [5][6][7][8] . Therefore, enhancing the oxidation resistance of TiAl alloys above 800 °C has become an urgent problem [9] . Domestic and foreign scholars have obtained results regarding the oxidation resistance of TiAl alloys [10,11] . Studies

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High-temperature oxidation behaviour of TiAl alloys with Co addition

Hui

et al. 2020

J Mater Sci

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Cyclic Oxidation Behaviors of TiAl–Nb–Si-Based Alloys

Cited by 7 publications

References 18 publications

Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C

Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C

High-temperature oxidation behavior of a cast Ti-47.5Al-2.5V-1.0Cr-0.2Zr alloy

High-temperature oxidation behaviour of TiAl alloys with Co addition

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