Progress in Nb-Si ultra-high temperature structural materials: A review

Liu, Wei; Huang, Shuai; Ye, Chengtong; Kang, Yongwang; Sha, Jiahao; Chen, Bingqing; Wu, Yu; Xiong, Hanguo

doi:10.1016/j.jmst.2022.11.022

Cited by 53 publications

(7 citation statements)

References 235 publications

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“…Moreover, the inner diffusion of oxygen has resulted in the oxidization according to the recent researches [28][29][30], the mechanical properties are closely related with microstructure. especially for the alloy with intermetallic phase, the ductile phase could play an important role [31,32]. in the present research, the nbss acts as the ductile phase to improve the room-temperature deformation behavior of the nbSi based alloy.…”

Section: Oxidation Behaviormentioning

confidence: 65%

Microstructure, Compressive Properties and Oxidation Behaviors of the Nb-Si-Ti-Cr-Al-Ta-Hf Alloy with Minor Holmium Addition

Wang,

Xiao,

et al. 2024

Archives of Metallurgy and Materials

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In the present research, the Nb-Si-Ti-Cr-Al-Ta-Hf alloys with different Ho addition were prepared. Their microstructure, compressive properties and oxidation behaviors were investigated preliminarily. The results exhibit that the Nb-Si-Ti-Cr-Al-Ta-Hf alloy has coarse microstructure which is mainly composed of Nb solid solution, Nb5Si3 and Ti5Si3 phases. The minor Ho addition could refine the microstructure and suppress the precipitation of Ti5Si3 phase. Moreover, the Ho addition also leads to the formation of Ho2Hf2O7, which prefers to precipitate along the Nbss/Nb5Si3 phase interface. Compared with the Nb-Si-Ti-Cr-Al-Ta-Hf alloy, the minor Ho addition improves the room-temperature and high-temperature compressive properties of the alloy. Its room-temperature compressive strength and ductility obtain the maximum value of 1825 MPa and 16.5% when the Ho content is 0.1 at.%. Moreover, its best compressive strength at 873 K, 1273 K and 1473 K is 1495 MPa, 765 MPa and 380 MPa, respectively, when the Ho addition is 0.1 at.%. The oxidation behavior of the Nb-Si-Ti-Cr-Al-Ta-Hf alloy is diversified with the Ho addition. The oxidation rate of the alloy with 0.1 at.% Ho addition is the lowest while the alloy with 0.2 at.% Ho addition is the highest. Therefore, the 0.1 at.% Ho would be the appropriate content for the Nb-Si-Ti-Cr-Al-Ta-Hf alloy.

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Section: Oxidation Behaviormentioning

confidence: 65%

Microstructure, Compressive Properties and Oxidation Behaviors of the Nb-Si-Ti-Cr-Al-Ta-Hf Alloy with Minor Holmium Addition

Wang,

Xiao,

et al. 2024

Archives of Metallurgy and Materials

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“…Ultra-high-temperature ceramics refer to metal carbides, borides, nitrides, and their multiphase ceramics with melting points over 3000 • C, such as HfC, TaC, NbC, ZrC, ZrB 2 , HfN, etc. [1][2][3][4][5] They have been widely studied due to their high melting point and good ablation resistance. [6][7][8] In recent years, the high-entropy concept of high-entropy alloys has been gradually expanded to other materials, and high-entropy ceramics have attracted much more attention due to their high hardness, high strength, and good thermal stability.…”

Section: Introductionmentioning

confidence: 99%

“…Ultra‐high‐temperature ceramics refer to metal carbides, borides, nitrides, and their multiphase ceramics with melting points over 3000°C, such as HfC, TaC, NbC, ZrC, ZrB 2 , HfN, etc 1–5 . They have been widely studied due to their high melting point and good ablation resistance 6–8 .…”

Section: Introductionmentioning

confidence: 99%

Preparation of (Ti_0.2Zr_0.2Hf_0.2Nb_0.2Ta_0.2)C high‐entropy ceramic nanopowders via liquid‐phase precursor

Xie,

Miao,

Wan

et al. 2024

J Am Ceram Soc.

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Using citric acid, ethylene glycol, ZrOCl2·8H2O, HfOCl2·8H2O, TiCl4, NbCl5, and TaCl5 as raw materials, the (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C high‐entropy ceramic precursor was prepared by Pechini coordination polymerization method. The precursor and pyrolysis products were analyzed and characterized by different methods. The results showed that the precursor formed a chelate structure, which greatly improved the stability of the precursor, and was clear and transparent with moderate viscosity (30–50 mPa·s). At a low pyrolysis temperature of 1600°C, single‐phase (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C high‐entropy ceramic nanopowders with a ceramic yield of 50.8% can be obtained. The high‐entropy ceramic powder has high purity, a particle size of about 140–200 nm, and uniform element distribution. It is suitable for introduction into fiber‐reinforced ceramic matrix composite by precursor infiltration and pyrolysis (PIP) process.

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“…The demand for materials with enhanced abrasion resistance, corrosion resistance, and high-temperature strength has escalated significantly with the advancement of modern science and technology, particularly in aerospace and advanced weaponry. Traditional high-temperature structural materials [1] are inadequate in meeting the requirements of modern applications. Consequently, surface protective coating technology has emerged for a balance between the mechanical and chemical properties of materials.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation and first-principles calculations of Nb and W alloying effects on the microstructure and properties of MoSi₂ coatings fabricated via arc cladding

Wang,

Sun,

Zhang

et al. 2023

Mater. Res. Express

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MoSi2 is one of the most promising refractory metal silicide materials, but its further use as a structural material is limited by its drawbacks such as poor room-temperature toughness and low high-temperature strength. The work performed a comprehensive investigation combining first-principles calculations and arc cladding experiments to explore the effects of Nb and W doping on the mechanical properties and electronic structure of MoSi2 coatings. The first-principles calculations revealed that Nb addition improved the B/G value and Poisson's ratio of MoSi2, indicating enhanced ductility. W addition yields the opposite effect and led to a higher elastic modulus and improved hardness. Experimental results demonstrated that the arc-cladding MoSi2 coating mainly consisted of MoSi2 and Mo5Si3 phases with a dendritic microstructure. Upon doping with Nb and W, additional t-(Mo,Nb)Si2 and t-(Mo,W)Si2 phases were formed, which resulted in a denser and finer microstructure. Nb addition contributed to the solid-solution toughening of the coating, while W addition enhanced hardness but reduced toughness. Remarkably, the synergistic alloying of Nb and W significantly increased the hardness and fracture toughness of the coating by 30.7 and 70.7%, respectively, compared to pure MoSi2. The strengthening mechanism of the coating was attributed to solid-solution softening and fine-grain strengthening, while the crack extension mechanism involved the crack deflection and bridging. Furthermore, the coatings doped with 2% Nb and 4% W exhibited the lowest wear weight loss and superior wear resistance. The dominant wear mechanisms were oxidation wear and abrasive wear.

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Progress in Nb-Si ultra-high temperature structural materials: A review

Cited by 53 publications

References 235 publications

Microstructure, Compressive Properties and Oxidation Behaviors of the Nb-Si-Ti-Cr-Al-Ta-Hf Alloy with Minor Holmium Addition

Microstructure, Compressive Properties and Oxidation Behaviors of the Nb-Si-Ti-Cr-Al-Ta-Hf Alloy with Minor Holmium Addition

Preparation of (Ti_0.2Zr_0.2Hf_0.2Nb_0.2Ta_0.2)C high‐entropy ceramic nanopowders via liquid‐phase precursor

Experimental investigation and first-principles calculations of Nb and W alloying effects on the microstructure and properties of MoSi₂ coatings fabricated via arc cladding

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Progress in Nb-Si ultra-high temperature structural materials: A review

Cited by 53 publications

References 235 publications

Microstructure, Compressive Properties and Oxidation Behaviors of the Nb-Si-Ti-Cr-Al-Ta-Hf Alloy with Minor Holmium Addition

Microstructure, Compressive Properties and Oxidation Behaviors of the Nb-Si-Ti-Cr-Al-Ta-Hf Alloy with Minor Holmium Addition

Preparation of (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C high‐entropy ceramic nanopowders via liquid‐phase precursor

Experimental investigation and first-principles calculations of Nb and W alloying effects on the microstructure and properties of MoSi2 coatings fabricated via arc cladding

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Product

Resources

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Preparation of (Ti_0.2Zr_0.2Hf_0.2Nb_0.2Ta_0.2)C high‐entropy ceramic nanopowders via liquid‐phase precursor

Experimental investigation and first-principles calculations of Nb and W alloying effects on the microstructure and properties of MoSi₂ coatings fabricated via arc cladding