Hang Ding , Jun Ye , Xun He , Song Tang , Yun Xie , Xiaoyong Shu , Xiao Peng
{"title":"沉积Cr前驱体膜制备低铝镍铝合金抗氧化新策略","authors":"Hang Ding , Jun Ye , Xun He , Song Tang , Yun Xie , Xiaoyong Shu , Xiao Peng","doi":"10.1016/j.surfcoat.2025.132689","DOIUrl":null,"url":null,"abstract":"<div><div>Based on classical Wagner's criteria, Ni-Al alloys are unable to establish a protective alumina scale if their Al concentration is lower than the critical value required (<span><math><msubsup><mi>N</mi><mi>Al</mi><mfenced><mn>1</mn></mfenced></msubsup></math></span>) for external alumina scale formation. However, this study presented that depositing a thin metallic Cr film on Ni-16Al alloy with a subcritical Al concentration promoted the transition from internal to external Al<sub>2</sub>O<sub>3</sub> oxidation, converting the alloy from a NiO-former to an Al<sub>2</sub>O<sub>3</sub>-former and reducing oxidation rate by 80 %. More importantly, the newly grown Al<sub>2</sub>O<sub>3</sub> layer was in stable alpha phase, providing better protection than the predominant metastable-Al<sub>2</sub>O<sub>3</sub> layer formed by bare Ni-22Al alloy. This provides a novel strategy for designing advanced structural alloys with good combination of oxidation resistance and mechanical properties.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"516 ","pages":"Article 132689"},"PeriodicalIF":6.1000,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A novel antioxidant strategy for low Al-containing Ni-Al alloys by deposition of a Cr precursor film\",\"authors\":\"Hang Ding , Jun Ye , Xun He , Song Tang , Yun Xie , Xiaoyong Shu , Xiao Peng\",\"doi\":\"10.1016/j.surfcoat.2025.132689\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Based on classical Wagner's criteria, Ni-Al alloys are unable to establish a protective alumina scale if their Al concentration is lower than the critical value required (<span><math><msubsup><mi>N</mi><mi>Al</mi><mfenced><mn>1</mn></mfenced></msubsup></math></span>) for external alumina scale formation. However, this study presented that depositing a thin metallic Cr film on Ni-16Al alloy with a subcritical Al concentration promoted the transition from internal to external Al<sub>2</sub>O<sub>3</sub> oxidation, converting the alloy from a NiO-former to an Al<sub>2</sub>O<sub>3</sub>-former and reducing oxidation rate by 80 %. More importantly, the newly grown Al<sub>2</sub>O<sub>3</sub> layer was in stable alpha phase, providing better protection than the predominant metastable-Al<sub>2</sub>O<sub>3</sub> layer formed by bare Ni-22Al alloy. This provides a novel strategy for designing advanced structural alloys with good combination of oxidation resistance and mechanical properties.</div></div>\",\"PeriodicalId\":22009,\"journal\":{\"name\":\"Surface & Coatings Technology\",\"volume\":\"516 \",\"pages\":\"Article 132689\"},\"PeriodicalIF\":6.1000,\"publicationDate\":\"2025-09-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Surface & Coatings Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0257897225009636\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, COATINGS & FILMS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surface & Coatings Technology","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0257897225009636","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, COATINGS & FILMS","Score":null,"Total":0}
A novel antioxidant strategy for low Al-containing Ni-Al alloys by deposition of a Cr precursor film
Based on classical Wagner's criteria, Ni-Al alloys are unable to establish a protective alumina scale if their Al concentration is lower than the critical value required () for external alumina scale formation. However, this study presented that depositing a thin metallic Cr film on Ni-16Al alloy with a subcritical Al concentration promoted the transition from internal to external Al2O3 oxidation, converting the alloy from a NiO-former to an Al2O3-former and reducing oxidation rate by 80 %. More importantly, the newly grown Al2O3 layer was in stable alpha phase, providing better protection than the predominant metastable-Al2O3 layer formed by bare Ni-22Al alloy. This provides a novel strategy for designing advanced structural alloys with good combination of oxidation resistance and mechanical properties.
期刊介绍:
Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance:
A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting.
B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.