Oxidation of Metals最新文献

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High temperature oxidation behaviour of compositionally complex Ta‒Mo‒Cr‒Ti‒Al alloy in steam atmosphere 复合Ta-Mo-Cr-Ti-Al合金在蒸汽气氛中的高温氧化行为
IF 1.5 3区 材料科学
Oxidation of Metals Pub Date : 2026-07-25 DOI: 10.1007/s11085-026-10440-z
Björn Schäfer, Michael Dürrschnabel, Carsten Schroer, Chongchong Tang, Fabian Lanoy, Emma White, Mathias Galetz, Bronislava Gorr
{"title":"High temperature oxidation behaviour of compositionally complex Ta‒Mo‒Cr‒Ti‒Al alloy in steam atmosphere","authors":"Björn Schäfer,&nbsp;Michael Dürrschnabel,&nbsp;Carsten Schroer,&nbsp;Chongchong Tang,&nbsp;Fabian Lanoy,&nbsp;Emma White,&nbsp;Mathias Galetz,&nbsp;Bronislava Gorr","doi":"10.1007/s11085-026-10440-z","DOIUrl":"10.1007/s11085-026-10440-z","url":null,"abstract":"<div><p>The oxidation behaviour of TaMoCrTiAl in steam at 900–1100 °C has been investigated by thermogravimetric analysis of oxidation kinetics and detailed cross-sectional SEM and TEM characterization of the multilayered oxide scales formed during exposure. Experiments point to the significance of both outward diffusion of metal cations and inward transport of oxidizing species, whereas the latter becomes increasingly dominant with increasing exposure times. Based on these findings, a mechanistic oxidation model for TaMoCrTiAl in steam is proposed and compared with the oxidation behaviour in air. In contrast to oxidation in synthetic air, the (Cr, Ta, Ti)O₂ layer typical for TaMoCrTiAl is absent, but formation of (Ti, Ta)O₂ observed, with impact on both formation of external oxide and internal corrosion.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"103 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11085-026-10440-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-Temperature Oxidation Behaviors of W–Re Alloy for Advanced Nuclear Power Systems 先进核电系统用W-Re合金的高温氧化行为
IF 1.5 3区 材料科学
Oxidation of Metals Pub Date : 2026-07-25 DOI: 10.1007/s11085-026-10438-7
Jiahui Shen, Zhengang Duan, Qinglong Wen, Luying Li
{"title":"High-Temperature Oxidation Behaviors of W–Re Alloy for Advanced Nuclear Power Systems","authors":"Jiahui Shen,&nbsp;Zhengang Duan,&nbsp;Qinglong Wen,&nbsp;Luying Li","doi":"10.1007/s11085-026-10438-7","DOIUrl":"10.1007/s11085-026-10438-7","url":null,"abstract":"<div><p>Tungsten-rhenium alloys are promising candidates for high-temperature structural applications in advanced nuclear power systems; however, their oxidation behavior and degradation mechanisms across a wide temperature range remain insufficiently understood. In the current study, the high-temperature oxidation behavior of W-26Re alloy was investigated in air at 700, 900, and 1100 °C. The evolution of oxide film morphology, phase constitution, and elemental distribution was systematically characterized using SEM and XRD. The results indicate a strong temperature dependence of oxidation behavior. At 700 °C, the oxidation rate was relatively slow, resulting in a dense oxide film. At 900 °C, the high vapor pressures of Re<sub>2</sub>O<sub>7</sub> and ReO<sub>3</sub> induced delamination of the oxide film, accompanied by the formation of numerous pores and cracks, which in turn accelerated the oxidation kinetics. At 1100 °C, severe volatilization of rhenium oxides led to an extensive depletion of surface Re and the formation of a porous WO<sub>3</sub>-dominated oxide film. The intense volatilization of rhenium oxides at elevated temperatures compromises the film's protective capability by inducing severe Re depletion and macroscopic cracking, thereby accelerating the alloy's high-temperature oxidation.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"103 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Unifying Review of Breakaway Oxidation in Early Transition Metals at High Temperatures 高温下早期过渡金属分离氧化研究综述
IF 1.5 3区 材料科学
Oxidation of Metals Pub Date : 2026-07-20 DOI: 10.1007/s11085-026-10435-w
Isha Gupta, Shalini Tripathi, B. Gorr
{"title":"A Unifying Review of Breakaway Oxidation in Early Transition Metals at High Temperatures","authors":"Isha Gupta,&nbsp;Shalini Tripathi,&nbsp;B. Gorr","doi":"10.1007/s11085-026-10435-w","DOIUrl":"10.1007/s11085-026-10435-w","url":null,"abstract":"<div><p>Early transition metals from Groups IV to VI are critical for maintaining structural integrity at high temperatures. However, their performance is often limited by breakaway oxidation, the transition from initially protective oxide growth to accelerated, non-protective oxidation. Despite decades of research, the underlying mechanisms remain unresolved, even within individual metals. This review argues that the shared oxidation characteristics of these metals warrant a unified assessment to constrain the mechanistic space and guide focused future studies. Experimental and theoretical evidence across Ti, Zr, Nb, Ta, and W is synthesized to identify critical gaps in current understanding. This unified perspective suggests that breakaway may arise from coupled instabilities at the metal-oxide interface involving oxygen dissolution into the metal, defect-rich monoxides, and growth-induced stresses that promote cracking and porosity. In addition, alloying and processing strategies proposed to enhance the oxidation resistance of these metals are synthesized. Finally, the influence of early transition metals on the oxidation performance of emerging refractory high-entropy alloys is discussed, highlighting the broader significance of the mechanistic insights developed in this review. These insights are particularly timely given the urgent demand for oxidation-resistant materials in ultra-high temperature applications.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"103 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11085-026-10435-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Suppression of Ash-Induced Chromia Breakdown on Fe-Based Austenitic Alloy by NiCr2O4 Spinel Formation NiCr2O4尖晶石对铁基奥氏体合金灰分致铬击穿的抑制作用
IF 1.5 3区 材料科学
Oxidation of Metals Pub Date : 2026-07-20 DOI: 10.1007/s11085-026-10432-z
A. Shaaban, S. Sugiyama, T. Furugaki, S. Yoneda, S. Hayashi
{"title":"Suppression of Ash-Induced Chromia Breakdown on Fe-Based Austenitic Alloy by NiCr2O4 Spinel Formation","authors":"A. Shaaban,&nbsp;S. Sugiyama,&nbsp;T. Furugaki,&nbsp;S. Yoneda,&nbsp;S. Hayashi","doi":"10.1007/s11085-026-10432-z","DOIUrl":"10.1007/s11085-026-10432-z","url":null,"abstract":"<div><p>The effect of a NiCr<sub>2</sub>O<sub>4</sub> spinel-containing oxide layer on the corrosion resistance of Fe–20Ni–25Cr–1Si (wt%) alloy was investigated in a synthetic CaO-based ash containing alkali metal chlorides at 520 °C in air. To promote spinel formation, the alloy surface was first coated with Ni by electrodeposition and subsequently pre-oxidized in air at 900 °C for 144 h. This treatment produced a duplex oxide structure consisting of an outer Ni-rich oxide layer and an inner Cr<sub>2</sub>O<sub>3</sub> scale with an intermediate NiCr<sub>2</sub>O<sub>4</sub> spinel layer. Corrosion tests revealed that the Ni-coated alloy exhibited significantly lower mass gain and improved oxide-scale stability compared with the bare alloy, which formed a single Cr<sub>2</sub>O<sub>3</sub> scale. Microstructural and phase analyses showed that the bare alloy underwent progressive chromia degradation through chromate formation, leading to scale fragmentation and accelerated corrosion. In contrast, the NiCr<sub>2</sub>O<sub>4</sub>-containing oxide scale suppressed chromia degradation and limited the penetration of ash constituents into the oxide scale. The improved corrosion resistance was attributed to the ability of the NiCr<sub>2</sub>O<sub>4</sub> spinel layer to reduce direct interaction between Ca-containing species and Cr<sub>2</sub>O<sub>3</sub> while restricting the transport of reactive chromium species toward the ash/oxide interface. These findings demonstrate that the controlled formation of a NiCr<sub>2</sub>O<sub>4</sub> spinel layer is an effective strategy for enhancing the durability of chromia-forming alloys in Ca-rich ash environments relevant to waste-to-energy systems. However, the long-term durability of this protective effect remains to be established, as progressive accumulation of ash deposits and corrosive salts may eventually compromise the integrity of the spinel-containing oxide layer.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"103 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Physics-Based Diffusion–Reaction Oxidation Model for Coated Ni-Based Superalloys 涂层镍基高温合金的物理扩散-反应氧化模型
IF 1.5 3区 材料科学
Oxidation of Metals Pub Date : 2026-07-20 DOI: 10.1007/s11085-026-10436-9
A. Staroselsky, B. N. Cassenti
{"title":"Physics-Based Diffusion–Reaction Oxidation Model for Coated Ni-Based Superalloys","authors":"A. Staroselsky,&nbsp;B. N. Cassenti","doi":"10.1007/s11085-026-10436-9","DOIUrl":"10.1007/s11085-026-10436-9","url":null,"abstract":"<div><p>This work develops a physics-based reaction–diffusion model for the oxidation of nickel-based superalloys that explicitly couples oxygen transport, aluminum consumption, and oxidation-induced swelling within a unified formulation. The model captures α-alumina scale growth, substrate aluminum depletion, and the effect of swelling-driven deformation on diffusion. Model predictions show good agreement with experimental data and highlight the role of aluminum-rich bond coats in limiting depletion by serving as aluminum reservoirs. The novelty of this work lies in a unified reaction–diffusion framework that simultaneously incorporates oxidation-induced swelling and aluminum depletion, enabling mechanistic predictions of long-term oxidation behavior. This formulation provides a foundation for future extensions to stress-coupled or three-dimensional analyses relevant to high-temperature component life assessment.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"103 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-Temperature Molten Vermiculite Degradation Mechanisms of APS AlCoCrFeNiTi High-Entropy Alloy Coatings at 1200 °C APS AlCoCrFeNiTi高熵合金涂层高温熔融蛭石降解机理
IF 1.5 3区 材料科学
Oxidation of Metals Pub Date : 2026-07-20 DOI: 10.1007/s11085-026-10439-6
Gulfem Binal, Okan Odabas, Abdullah Cahit Karaoglanli
{"title":"High-Temperature Molten Vermiculite Degradation Mechanisms of APS AlCoCrFeNiTi High-Entropy Alloy Coatings at 1200 °C","authors":"Gulfem Binal,&nbsp;Okan Odabas,&nbsp;Abdullah Cahit Karaoglanli","doi":"10.1007/s11085-026-10439-6","DOIUrl":"10.1007/s11085-026-10439-6","url":null,"abstract":"<div><p>This study investigates the high-temperature corrosion mechanisms of a Ti-doped AlCoCrFeNi high-entropy alloy (HEA) coating system under severe molten vermiculite (VM) exposure. A CoNiCrAlY bond coat was deposited on Inconel 718 via HVOF, followed by an APS-sprayed Ti-doped HEA top layer. The APS CoNiCrAlY/AlCoCrFeNiTi coating system, consisting of an approximately 100 µm CoNiCrAlY bond coat and an APS-sprayed HEA top coat, was exposed to molten vermiculite at 1200 °C for 1, 3, 5, 10, and 24 h, and the resulting microstructural evolution was investigated using SEM, XRD, and EDS. The coating exhibited strong resistance to molten silicate infiltration, with penetration largely confined to near-surface regions. This behavior may be associated with the formation of dense Al<sub>2</sub>O<sub>3</sub> and Cr<sub>2</sub>O<sub>3</sub> scales. In addition, diffusion-limiting mechanisms frequently reported in HEA systems may also contribute to the observed behavior. However, prolonged exposure led to selective dissolution of oxide layers and spinel phases due to chemical interaction with the silicate melt. In addition, thermal expansion mismatch and stress accumulation during cooling induced localized spallation. Overall, the Ti-doped HEA acts as an effective diffusion barrier, significantly delaying corrosion progression despite gradual thickness loss under severe conditions. These findings provide novel insight into the transition from protective oxidation to chemically driven degradation in HEA coatings under severe molten silicate attack, and highlight the unique potential of HEA coatings as dynamically self-renewing barriers against molten VM-related damage in gas turbine applications.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"103 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction: Effect of Deposit Chemistry on the Stress Corrosion Cracking Susceptibility of CMSX-10 at 550 °C and 700 °C 修正:沉积化学对CMSX-10在550°C和700°C应力腐蚀开裂敏感性的影响
IF 1.5 3区 材料科学
Oxidation of Metals Pub Date : 2026-07-09 DOI: 10.1007/s11085-026-10419-w
F. Duarte Martinez, A. Syed, G. Gibson, J. Leggett, J. C. Mason‑Flucke, J. R. Nicholls, S. Gray
{"title":"Correction: Effect of Deposit Chemistry on the Stress Corrosion Cracking Susceptibility of CMSX-10 at 550 °C and 700 °C","authors":"F. Duarte Martinez,&nbsp;A. Syed,&nbsp;G. Gibson,&nbsp;J. Leggett,&nbsp;J. C. Mason‑Flucke,&nbsp;J. R. Nicholls,&nbsp;S. Gray","doi":"10.1007/s11085-026-10419-w","DOIUrl":"10.1007/s11085-026-10419-w","url":null,"abstract":"","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"103 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11085-026-10419-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Oxidizing Impurities on the Corrosion Behavior of Structural Alloys Exposed to MgCl2 Molten Salt Vapor 氧化性杂质对MgCl2熔盐蒸气中结构合金腐蚀行为的影响
IF 1.5 3区 材料科学
Oxidation of Metals Pub Date : 2026-07-06 DOI: 10.1007/s11085-026-10433-y
Samuel Pennell, Kritee Pokharel, Kyle Foster, Judith Vidal, Kerry Rippy
{"title":"Effect of Oxidizing Impurities on the Corrosion Behavior of Structural Alloys Exposed to MgCl2 Molten Salt Vapor","authors":"Samuel Pennell,&nbsp;Kritee Pokharel,&nbsp;Kyle Foster,&nbsp;Judith Vidal,&nbsp;Kerry Rippy","doi":"10.1007/s11085-026-10433-y","DOIUrl":"10.1007/s11085-026-10433-y","url":null,"abstract":"<div><p>The corrosion behavior of structural alloys SS304 and IN617 when exposed to vapors of MgCl<sub>2</sub> molten salt at 764 °C for 100 h in an argon atmosphere was investigated as a function of the level of oxidizing impurities (e.g., NaOH) present in the salt. Increasing the concentration of oxidizing impurities in the salt caused an increase in corrosion in both structural alloys, as measured by Cr depletion layers. A poorly adhered oxide scale layer containing Mg, Al, and Cr was observed on the surface of the metals, and local attack was observed as well. The Ni-based IN617 showed lower Cr depletion and less scale formation than the Fe-based SS304. These results demonstrate that oxidizing impurities in the molten salt will impact the vapor phase corrosion for structural members exposed to the molten salt headspace. This finding is highly relevant for understanding the effects of the vapor phase in molten salt applications, including molten salt thermal energy storage, molten salt nuclear reactors, and molten salt electrochemistry.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"103 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11085-026-10433-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction: Phase-Transformation-Driven Decarburization and its Cumulative Amplification in Multi-Stage Processing of 55SiCr Spring Steel 修正:55SiCr弹簧钢多阶段加工相变驱动脱碳及其累积放大
IF 1.5 3区 材料科学
Oxidation of Metals Pub Date : 2026-07-03 DOI: 10.1007/s11085-026-10431-0
Y. F. Peng, L. N. Zhang, C. Y. Wei, Z. Yao, H. X. Zheng, F. Jin, X. M. Dong, Z. H. Zhang, G. H. Cao
{"title":"Correction: Phase-Transformation-Driven Decarburization and its Cumulative Amplification in Multi-Stage Processing of 55SiCr Spring Steel","authors":"Y. F. Peng,&nbsp;L. N. Zhang,&nbsp;C. Y. Wei,&nbsp;Z. Yao,&nbsp;H. X. Zheng,&nbsp;F. Jin,&nbsp;X. M. Dong,&nbsp;Z. H. Zhang,&nbsp;G. H. Cao","doi":"10.1007/s11085-026-10431-0","DOIUrl":"10.1007/s11085-026-10431-0","url":null,"abstract":"","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"103 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CALPHAD-Based Evaluation of γ′/γ″ Phase Stability and Hot Corrosion Behavior in Niobium-Strengthened Inconel 718 基于calphad评价铌强化Inconel 718的γ′/γ″相稳定性和热腐蚀行为
IF 1.5 3区 材料科学
Oxidation of Metals Pub Date : 2026-07-02 DOI: 10.1007/s11085-026-10423-0
Zubia Anwer, Aiman Ayaz, Minal Sherwani, Muhammad Arsal Raza, Muhammad Kamran Bhatti, Muhammad Adeel Rauf, Ali Dad Chandio
{"title":"CALPHAD-Based Evaluation of γ′/γ″ Phase Stability and Hot Corrosion Behavior in Niobium-Strengthened Inconel 718","authors":"Zubia Anwer,&nbsp;Aiman Ayaz,&nbsp;Minal Sherwani,&nbsp;Muhammad Arsal Raza,&nbsp;Muhammad Kamran Bhatti,&nbsp;Muhammad Adeel Rauf,&nbsp;Ali Dad Chandio","doi":"10.1007/s11085-026-10423-0","DOIUrl":"10.1007/s11085-026-10423-0","url":null,"abstract":"<div><p>The development of the γ′ (Ni<sub>3</sub>(Al,Ti)) and γ″(Ni<sub>3</sub>Nb) phases gives excellent characteristics to the niobium-strengthened superalloy Inconel 718. The thermodynamic stability and phase fractions of the high-temperature products, i.e., γ′, γ″, and topologically close-packed (TCP) phases, within the temperature range of 500 °C to 1300 °C for Inconel 718 and its related alloys, were investigated in this study using CALPHAD methodology. Moreover, to investigate the high-temperature effect of Nb in superalloy, the Inconel 718 samples were periodically subjected to salt spray test at temperatures of 35˚C, 650˚C and 750˚C as to relate the weight change due to oxide spallation and corrosion resistance. The EDS analysis confirms the presence of Cr and Nb, so as the formation of protective oxides such as Cr<sub>2</sub>O<sub>3</sub> and Nb<sub>2</sub>O<sub>5</sub>. Consequently, the Nb<sub>2</sub>O<sub>5</sub> and Na<sub>2</sub>CrO<sub>4</sub> usually form at 650°C at all oxygen partial pressure but at low NaCl pressures. However, NaCl associated with the existence of NbCl<sub>5</sub> and other chlorine-based Nb-products. The Nb based complex oxides and Chlorine-based compounds are created at 750°C. The X Ray Diffraction also confirms the presence of numerous niobium-rich oxides, including NbO<sub>2</sub>, Nb<sub>2</sub>O<sub>5</sub>, and FeNbO₄, in addition to the intermetallic complex Ni<sub>3</sub>Nb. The findings support a robust relationship between experimental observations and thermodynamic expectations.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"103 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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