Revealing effect of Al content on oxidation of novel Co-Cr-Nb-W carbide-strengthened superalloy

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2024-06-03 DOI:10.1007/s12598-024-02735-4

Chen Ling, Shang-Ping Li, Jie Hou, He-Li Luo

{"title":"Revealing effect of Al content on oxidation of novel Co-Cr-Nb-W carbide-strengthened superalloy","authors":"Chen Ling, Shang-Ping Li, Jie Hou, He-Li Luo","doi":"10.1007/s12598-024-02735-4","DOIUrl":null,"url":null,"abstract":"The high-temperature oxidation behavior of novel Co-Cr-Nb-W carbide-strengthened wear-resistance alloys with different Al contents (1wt%, 2wt% and 3wt%) at 950, 1000 and 1050 °C was thoroughly investigated by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and field emission electron probe analyzer. The porous property of NbC in-situ oxidation products (Nb2O5, CoNb2O6 and Co4Nb2O9) induces a multi-layered oxide scale with micropores and cracks. Co-Cr-Nb-W alloy with 1 wt% Al undergoes catastrophic oxidation and spalling above 1000 °C. The outward transportation of Cr and Co is effectively restrained by a continuous Al2O3 scale formed around NbC in-situ oxidation region when Al content reaches 3 wt%. The β-CoAl in Co-Cr-Nb-W alloy with 3 wt% Al has an oxidation priority over eutectic carbides and the alloy matrix which are both enriched with Cr, thereby preventing the formation of Cr-depletion area and improving the self-healing ability of the oxide film. A slight change in Al content has a remarkable influence on the cooperative effect of Al and Cr and multiplies the antioxidant capacity of Co-Cr-Nb-W alloy above 1000 °C.<h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\n","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":null,"pages":null},"PeriodicalIF":9.6000,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rare Metals","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s12598-024-02735-4","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The high-temperature oxidation behavior of novel Co-Cr-Nb-W carbide-strengthened wear-resistance alloys with different Al contents (1wt%, 2wt% and 3wt%) at 950, 1000 and 1050 °C was thoroughly investigated by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and field emission electron probe analyzer. The porous property of NbC in-situ oxidation products (Nb₂O₅, CoNb₂O₆ and Co₄Nb₂O₉) induces a multi-layered oxide scale with micropores and cracks. Co-Cr-Nb-W alloy with 1 wt% Al undergoes catastrophic oxidation and spalling above 1000 °C. The outward transportation of Cr and Co is effectively restrained by a continuous Al₂O₃ scale formed around NbC in-situ oxidation region when Al content reaches 3 wt%. The β-CoAl in Co-Cr-Nb-W alloy with 3 wt% Al has an oxidation priority over eutectic carbides and the alloy matrix which are both enriched with Cr, thereby preventing the formation of Cr-depletion area and improving the self-healing ability of the oxide film. A slight change in Al content has a remarkable influence on the cooperative effect of Al and Cr and multiplies the antioxidant capacity of Co-Cr-Nb-W alloy above 1000 °C.

Graphical Abstract

Abstract Image

查看原文本刊更多论文

揭示铝含量对新型 Co-Cr-Nb-W 碳化物强化超合金氧化的影响

通过扫描电子显微镜、X 射线衍射、X 射线光电子能谱和场发射电子探针分析仪，深入研究了不同铝含量（1wt%、2wt% 和 3wt%）的新型 Co-Cr-Nb-W 碳化强化耐磨合金在 950、1000 和 1050 ℃ 下的高温氧化行为。NbC 原位氧化产物（Nb2O5、CoNb2O6 和 Co4Nb2O9）的多孔特性诱发了具有微孔和裂纹的多层氧化鳞片。含 1 wt% Al 的 Co-Cr-Nb-W 合金在 1000 °C 以上会发生灾难性氧化和剥落。当 Al 含量达到 3 wt% 时，NbC 原位氧化区周围形成的连续 Al2O3 鳞片有效地抑制了 Cr 和 Co 的向外迁移。Al 含量为 3 wt% 的 Co-Cr-Nb-W 合金中的β-CoAl 比共晶碳化物和合金基体（两者都富含 Cr）具有氧化优先权，从而防止了 Cr 损耗区的形成，提高了氧化膜的自修复能力。Al含量的微小变化对Al和Cr的协同作用有显著影响，并使Co-Cr-Nb-W合金在1000 °C以上的抗氧化能力成倍提高。

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

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.

文献相关原料

公司名称	产品信息	采购帮参考价格