Мақола

Investigating the Pressure-Dependent Enhancement of Oxide Layers (Al <sub>2</sub> O <sub>3</sub> ) at Elevated Temperatures: A Theoretical and Experimental Analysis

Shabir AliCollege of Mechanical and Energy Engineering, Beijing University of Technology, Beijing 100124, P. R. ChinaAli B.M. AliAir Conditioning Engineering Department, College of Engineering, University of Warith Al-Anbiyaa, Karbala, lraqXinhua WangCollege of Mechanical and Energy Engineering, Beijing University of Technology, Beijing 100124, P. R. ChinaGhulam RasoolDepartment of Mechanical Engineering, College of Engineering, Prince Mohammad Bin Fahd University, P. O. Box 1664, Al-Khobar 31952, Saudi ArabiaIzzat RazzaqCollege of Mechanical and Energy Engineering, Beijing University of Technology, Beijing 100124, P. R. ChinaAmjad AlmunyifDepartment of Physics, College of Sciences, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi ArabiaShoira FormanovaDepartment of Chemistry and Its Teaching Methods, Tashkent State Pedagogical University, Tashkent, Uzbekistan

NANOjournal2025en

ABI

Аннотация

This study highlights the significant impact of external pressure on the oxidation behavior of Co-based alloys, which are widely used in high-temperature applications due to their exceptional strength and oxidation resistance. The aim of this research is to investigate the influence of pressure on the oxidation mechanisms of Co-based alloys at elevated temperatures, specifically at 1323[Formula: see text]K, over a duration of up to 430[Formula: see text]h. The research methodology involves X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis to examine the oxidation process. Additionally, thermodynamic property was calculated using the Gibbs2 package in the WIEN2k code at elevated pressure and temperature conditions. The findings reveal that while pressure increases the thickness of the oxide layer and induces voids and discontinuities, it also leads to a phase transformation in the [Formula: see text]-NiAl phase. The study concludes that external pressure significantly enhances the adhesion of the oxide layer but also induces instability in its internal structure, offering crucial insights for optimizing oxidation mechanisms in Co-based alloys for high-temperature applications.

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Мавзулар

Semiconductor materials and devices Electronic and Structural Properties of Oxides Advanced ceramic materials synthesis

Идентификаторлар

DOI: 10.1142/s1793292025500997

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