High Temperature Oxidation Resistance of Off-Stoichiometric (Ni39.6Co29.3Cr10Al15.8Ta3.3Nb2)98.5B1.5 Chemically Complex Intermetallic Alloy

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2026-06-05 DOI:10.1007/s12540-025-02184-3

Ahmad Ostovari Moghaddam, Seyedsaeed Mehrabi-Kalajahi, Ibrokhimi Ashurali Solizoda, Morteza Alizadeh, Alexei Vagov

{"title":"High Temperature Oxidation Resistance of Off-Stoichiometric (Ni39.6Co29.3Cr10Al15.8Ta3.3Nb2)98.5B1.5 Chemically Complex Intermetallic Alloy","authors":"Ahmad Ostovari Moghaddam, Seyedsaeed Mehrabi-Kalajahi, Ibrokhimi Ashurali Solizoda, Morteza Alizadeh, Alexei Vagov","doi":"10.1007/s12540-025-02184-3","DOIUrl":null,"url":null,"abstract":"<div>Off-stoichiometric boron-doped chemically complex intermetallic alloys (CCIMAs) have recently emerged as a new avenue for overcoming the low temperature brittleness of ordered superlattices. However, their behavior at high temperatures remains unexplored. In this study, a novel (Ni39.6Co29.3Cr10Al15.8Ta3.3Nb2)98.5B1.5 CCIMA was prepared and its oxidation resistance over a wide temperature range (500 ℃ –950 °C) was studied. The sample exhibited a dual-phase microstructure consisting of ordered L12 grains and a disordered Cr-rich BCC phase at the grain boundaries. The CCIMA sample demonstrated outstanding oxidation resistance at 500 °C, 750 °C, and 950 °C, showing no signs of pest oxidation and exhibiting low mass gain rates of 8.05 × 10− 5 mg2cm− 4h− 1, 8.97 × 10− 5 mg2cm− 4h− 1 and 5.39 × 10− 4 mg2cm− 4h− 1, respectively. At temperatures above 700 °C, Al2O3 and CrTaO4 oxide layers formed on the surface, significantly hindering further oxidation of the sample. This study demonstrates how chemical composition can be exploited to synergistically develop protective oxide layers on the surface of CCIMAs.<h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 11","pages":"3767 - 3775"},"PeriodicalIF":4.5000,"publicationDate":"2026-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metals and Materials International","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s12540-025-02184-3","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Off-stoichiometric boron-doped chemically complex intermetallic alloys (CCIMAs) have recently emerged as a new avenue for overcoming the low temperature brittleness of ordered superlattices. However, their behavior at high temperatures remains unexplored. In this study, a novel (Ni_39.6Co_29.3Cr₁₀Al_15.8Ta_3.3Nb₂)_98.5B_1.5 CCIMA was prepared and its oxidation resistance over a wide temperature range (500 ℃ –950 °C) was studied. The sample exhibited a dual-phase microstructure consisting of ordered L1₂ grains and a disordered Cr-rich BCC phase at the grain boundaries. The CCIMA sample demonstrated outstanding oxidation resistance at 500 °C, 750 °C, and 950 °C, showing no signs of pest oxidation and exhibiting low mass gain rates of 8.05 × 10^− 5 mg²cm^− 4h^− 1, 8.97 × 10^− 5 mg²cm^− 4h^− 1 and 5.39 × 10^− 4 mg²cm^− 4h^− 1, respectively. At temperatures above 700 °C, Al₂O₃ and CrTaO₄ oxide layers formed on the surface, significantly hindering further oxidation of the sample. This study demonstrates how chemical composition can be exploited to synergistically develop protective oxide layers on the surface of CCIMAs.

Graphical Abstract

查看原文本刊更多论文

非化学计量（Ni39.6Co29.3Cr10Al15.8Ta3.3Nb2）98.5B1.5化学络合金属间合金的高温抗氧化性

非化学计量掺硼化学络合金属间合金（ccima）近年来成为克服有序超晶格低温脆性的新途径。然而，它们在高温下的行为仍未被探索。本研究制备了一种新型（Ni39.6Co29.3Cr10Al15.8Ta3.3Nb2）98.5B1.5 CCIMA，并对其在500℃-950℃宽温度范围内的抗氧化性能进行了研究。样品呈现由有序L12晶粒和无序富cr BCC晶界组成的双相微观结构。CCIMA样品在500°C、750°C和950°C下表现出出色的抗氧化性，没有有害氧化的迹象，质量增益率分别为8.05 × 10−5 mg2cm−4h−1、8.97 × 10−5 mg2cm−4h−1和5.39 × 10−4 mg2cm−4h−1。当温度高于700℃时，表面形成Al2O3和CrTaO4氧化层，明显阻碍了样品的进一步氧化。本研究展示了如何利用化学成分在ccima表面协同发展保护性氧化层。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.