HfC–HfO 2modified high/superhigh temperature thermal protection coating for superior hot corrosion resistance and anti-oxidation performance DOI Creative Commons

Zhiyun Ye,

Shuqi Wang, Shuang Yu

et al.

Journal of Advanced Ceramics, Journal Year: 2024, Volume and Issue: 14(1), P. 9221014 - 9221014

Published: Dec. 5, 2024

With the advances in thrust-weight ratio, service temperature of gas turbine engines even exceeds 1500℃, which is urgent to develop high/superhigh thermal protection systems for long-term service. Niobium alloys are increasingly viewed as a promising structural material high-temperature applications due their superior mechanical strength, but "pest" catastrophic oxidation greatly restricts its further application. Herein, HfC-HfO2 modified silicide coating was prepared via an innovative method halide-activated pack cementation combined with liquid-plasma-assisted particle deposition and sintering on niobium alloys, endowing composite excellent hot corrosion resistance resistance. This multilayer characterized by synergistic combination dense NbSi2 inner layer porous outer layer, exhibiting significant improvement performance compared single coating. The corroded gain only 13.94 mg·cm-2 after time 200 h at 900℃, shows intact oxide scale surface 1500℃ 500 min. ascribed formed robust Hf-rich skeleton provided deposited can accelerate formation high stability layer/oxide scale. Besides, multiple stress release mechanisms temperatures also provide huge contributions All these merits render competitive development

Language: Английский

Microstructure characteristics and oxidation behavior of a dense Si-Cr-Fe-Ti coating with a multi-layer structure on Nb-Si based alloy by slurry sintering DOI
Weiping Zhang, Yanqiang Qiao,

Guo Xiping

et al.

Corrosion Science, Journal Year: 2025, Volume and Issue: unknown, P. 112743 - 112743

Published: Jan. 1, 2025

Language: Английский

Citations

1
Fabrication and characterization of the multifunctional coating composites fabrics: Waterproofing, breathability and daytime radiative cooling DOI

Peng Lu,

Heng Zhang, Qi Zhen

et al.

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: May 7, 2025

Abstract The development of high‐performance protective clothing is essential for ensuring the safety and comfort healthcare workers. Traditional materials often face challenges in breathability, waterproofing, thermal management. In this study, we fabricated polylactic acid/silicon dioxide–polyvinylidene fluoride /alumina (PLA/SiO 2 –PVDF/Al O 3 ) composite fabrics by coating PLA/SiO microfibers with PVDF/Al . resulting composites exhibited a microfibrous structure 82.1% porosity fiber diameters 10 μm, leading to enhanced air permeability (115.1 mm/s) water vapor (1686.4 g/m ·24 h). incorporation PVDF Al improved waterproofing properties significantly, increasing contact angle 138.1° hydrostatic pressure resistance 2382.2 Pa. Furthermore, radiative cooling efficiency was markedly enhanced, temperature reduction 9.0°C compared uncoated microfibers, achieving 87.4% reflectance 98.4% emissivity. These results demonstrate that fabrics, through simple process, exhibit excellent efficient daytime cooling, making them highly suitable applications. Highlights breathable acid were developed. fabric demonstrates μm microfibers. coated specimen hydrophobicity, robust protection. High emissivity (98.4%) indicates cooling.

Language: Английский

Citations

0
Accelerated design and fabrication of thermal protection coating via high-throughput experiments and machine learning DOI

Zhiyun Ye,

Ke Li, Guoliang Chen

et al.

Corrosion Science, Journal Year: 2024, Volume and Issue: 238, P. 112388 - 112388

Published: Aug. 22, 2024

Language: Английский

Citations

3
HfC–HfO 2modified high/superhigh temperature thermal protection coating for superior hot corrosion resistance and anti-oxidation performance DOI Creative Commons

Zhiyun Ye,

Shuqi Wang, Shuang Yu

et al.

Journal of Advanced Ceramics, Journal Year: 2024, Volume and Issue: 14(1), P. 9221014 - 9221014

Published: Dec. 5, 2024

With the advances in thrust-weight ratio, service temperature of gas turbine engines even exceeds 1500℃, which is urgent to develop high/superhigh thermal protection systems for long-term service. Niobium alloys are increasingly viewed as a promising structural material high-temperature applications due their superior mechanical strength, but "pest" catastrophic oxidation greatly restricts its further application. Herein, HfC-HfO2 modified silicide coating was prepared via an innovative method halide-activated pack cementation combined with liquid-plasma-assisted particle deposition and sintering on niobium alloys, endowing composite excellent hot corrosion resistance resistance. This multilayer characterized by synergistic combination dense NbSi2 inner layer porous outer layer, exhibiting significant improvement performance compared single coating. The corroded gain only 13.94 mg·cm-2 after time 200 h at 900℃, shows intact oxide scale surface 1500℃ 500 min. ascribed formed robust Hf-rich skeleton provided deposited can accelerate formation high stability layer/oxide scale. Besides, multiple stress release mechanisms temperatures also provide huge contributions All these merits render competitive development

Language: Английский

Citations

0