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Abstract <p>The changes in the microstructure of gas-permeable mesh wire matrices made from an iron-based alloy with composition Cr (22.5 ± 1%), Al (5 ± 1%), minor elements (2.2%), balance Fe were investigated under conditions of non‑catalytic conversion of hydrocarbon gases. A comparison was made with the morphology of the alloy (Fechral) after prolonged isothermal annealing in air. Using optical metallography, scanning and transmission electron microscopy, the evolution of the alloy’s structural and phase state and the increase in thickness of the oxide layer formed during the conversion process were studied.</p>

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The Effect of Long-Term Annealing on the Structure and Properties of the Fe–Cr–Al Alloy under Conditions of High-Temperature Non-Catalytic Conversion of Hydrocarbon Gases and Free Annealing in Air at 1000°C

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • S. S. Manokhin,
  • A. Yu. Tokmacheva-Kolobova,
  • I. V. Sedov,
  • Yu. R. Kolobov

摘要

Abstract

The changes in the microstructure of gas-permeable mesh wire matrices made from an iron-based alloy with composition Cr (22.5 ± 1%), Al (5 ± 1%), minor elements (2.2%), balance Fe were investigated under conditions of non‑catalytic conversion of hydrocarbon gases. A comparison was made with the morphology of the alloy (Fechral) after prolonged isothermal annealing in air. Using optical metallography, scanning and transmission electron microscopy, the evolution of the alloy’s structural and phase state and the increase in thickness of the oxide layer formed during the conversion process were studied.