Influence of Al content and low oxygen pressure preoxidation on high‐temperature oxidation resistance of Ni–25Cr–xAl–1Si–0.5Y alloys

Abstract

The influence of Al content and low oxygen pressure preoxidation on the high‐temperature oxidation resistance of the Ni–25Cr–xAl–1Si–0.5Y (x = 0, 1, 3, 5 wt%) alloys were studied. The formation of oxides in low oxygen pressure preoxidation was investigated. The oxidation behavior of alloys with different Al content at 1000°C with and without preoxidation under low oxygen pressure was discussed. A protective oxide film was formed on the surface of alloys with different Al content in low oxygen pressure pre‐oxidation at 950°C for 5 h, but there were great differences in microstructures and properties. With the increase of Al content, the outermost oxide film of the alloy gradually changed from continuous Cr2O3 to Al2O3, and the oxidation resistance of the alloy increased gradually at 1000°C. By comparison, the oxidation resistance of Ni–25Cr–xAl–1Si–0.5Y (x = 0, 1, 3, 5 wt%) alloys can be significantly improved at 1000°C by low oxygen pressure preoxidation treatment.

Recycling valuable materials from the spent lithium ion batteries to catalysts: methods, applications, and characterization

“…Guo et al employed a citric acid leaching method to efficiently recover precious metals from spent NCM cathodes [Figure 4A] [53] . Subsequently, they utilized the recovered materials to synthesize Mn-based multioxide catalysts designed for the oxidation of volatile organic compounds (VOCs).…”

“…The surge in the number of waste LIBs, coupled with the widespread use of graphite active materials and Cu in various fields, such as catalysis, has underscored the need for developing effective recycling strategies. Quoted with permission from Guo et al [53] ; (B) Schematic diagram of reuse of spent LiNi 0.94 Co 0.05 Mn 0.01 O 2 cathodes via electrochemical delithiation technology. Quoted with permission from Li et al [54] ; (C) Schematic diagram of preparation for NiMnCo-based catalysts from spent LIBs.…”

“…Figure 4. (A) Flow chart of utilizing the recovered materials from spent ternary LIBs to synthesize Mn-based multi-oxide catalysts.Quoted with permission from Guo et al[53] ; (B) Schematic diagram of reuse of spent LiNi 0.94 Co 0.05 Mn 0.01 O 2 cathodes via electrochemical delithiation technology. Quoted with permission from Li et al[54] ; (C) Schematic diagram of preparation for NiMnCo-based catalysts from spent LIBs.…”