Oxidation resistance of (Hf-Ta-Zr-Nb)C high entropy carbide powders compared with the component monocarbides and binary carbide powders

2021 ◽  
Vol 193 ◽  
pp. 86-90
Author(s):  
Yichen Wang ◽  
Michael J. Reece
Keyword(s):  
Oxidation Resistance ◽  
High Entropy ◽  
Binary Carbide

Thermal stability and oxidation resistance of FeCrxCoNiB high-entropy alloys coatings by laser cladding

2019 ◽  
Vol 359 ◽  
pp. 132-140 ◽  
Author(s):  
Fa Chang ◽  
Bingjie Cai ◽  
Chong Zhang ◽  
Biao Huang ◽  
Shuai Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Oxidation Resistance ◽  
Laser Cladding ◽  
High Entropy Alloys ◽  
High Entropy

Oxidation resistance properties of refractory high-entropy alloys with varied AlxCrTiMo content

2020 ◽  
Vol 56 (4) ◽  
pp. 3551-3561
Author(s):  
Ruiyang Zhang ◽  
Junhu Meng ◽  
Jiesheng Han ◽  
Kelimu Tulugan ◽  
Rui Zhang
Keyword(s):  
Oxidation Resistance ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals Effect of V and Ti on the Oxidation Resistance of WMoTaNb Refractory High-Entropy Alloy at High Temperatures

Metals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 41
Author(s):  
Shuaidan Lu ◽  
Xiaoxiao Li ◽  
Xiaoyu Liang ◽  
Wei Yang ◽  
Jian Chen
Keyword(s):  
Oxidation Resistance ◽  
High Temperatures ◽  
Elevated Temperatures ◽  
Early Stage ◽  
Mass Gain ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Entropy

Alloying with V and Ti elements effectively improves the strength of WMoTaNb refractory high entropy alloys (RHEAs) at elevated temperatures. However, their effects on the oxidation resistance of WMoTaNb RHEAs are unknown, which is vitally important to their application at high temperatures. In this work, the effect of V and Ti on the oxidation behavior of WMoTaNb RHEA at 1000 °C was investigated using a thermogravimetric system, X-ray diffraction and scanning electron microscopy. The oxidation of all alloys was found to obey a power law passivating oxidation at the early stage. The addition of V aggravates the volatility of V2O5, MoO3 and WO3, and leads to disastrous internal oxidation. The addition of Ti reduces the mass gain in forming the full coverage of passivating scale and prolongs the passivation duration of alloys.

scholarly journals Laser Metal Deposition of an AlCoCrFeNiTi0.5 High-Entropy Alloy Coating on a Ti6Al4V Substrate: Microstructure and Oxidation Behavior

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 638 ◽  
Author(s):  
Wenyuan Cui ◽  
Wei Li ◽  
Wei-Ting Chen ◽  
Frank Liou
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
Alloy Coating ◽  
Isothermal Oxidation ◽  
Metal Deposition ◽  
High Entropy Alloy ◽  
Laser Metal Deposition ◽  
High Entropy ◽  
Ti6al4v Substrate ◽  
Temperature Application

Ti6Al4V has been recognized as an attractive material, due to its combination of low density and favorable mechanical properties. However, its insufficient oxidation resistance has limited the high-temperature application. In this work, an AlCoCrFeNiTi0.5 high-entropy alloy (HEA) coating was fabricated on a Ti6Al4V substrate using laser metal deposition (LMD). The microstructure and isothermal oxidation behaviors were investigated. The microstructure of as-deposited HEA exhibited a Fe, Cr-rich A2 phase and an Al, Ni, Ti-enriched B2 phase. Its hardness was approximately 2.1 times higher than that of the substrate. The oxidation testing at 700 °C and 800 °C suggested that the HEA coating has better oxidation resistance than the Ti6Al4V substrate. The oxide scales of the Ti6Al4V substrate were mainly composed of TiO2, while continuous Al2O3 and Cr2O3 were formed in the HEA coatings and could be attributed to oxidation resistance improvement. This work provides an approach to mitigate the oxidation resistance of Ti6Al4V and explore the applicability of the HEA in a high-temperature environment.

Y-Hf co-doped Al1.1CoCr0.8FeNi high-entropy alloy with excellent oxidation resistance and nanostructure stability at 1200°C

2021 ◽  
Vol 203 ◽  
pp. 114105
Author(s):  
Jie Lu ◽  
Han Zhang ◽  
Ling Li ◽  
Aihui Huang ◽  
Xuanzhen Liu ◽  
...  
Keyword(s):  
Oxidation Resistance ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Co Doped
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