Katharina Beck, Till König, Ekin Senvardarli, Frauke Hinrichs, Martin Heilmaier, Mathias C. Galetz
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Galetz","doi":"10.1002/maco.202414491","DOIUrl":null,"url":null,"abstract":"<p>The hot corrosion behavior of two ternary Mo–Si–Ti alloys (eutectic Mo–20.0Si–52.8Ti (at.%) and eutectoid Mo–21.0Si–34.0Ti (at.%)) was investigated at <span></span><math>\n <semantics>\n <mrow>\n \n <mrow>\n <mn>700</mn>\n \n <mo>°</mo>\n </mrow>\n </mrow>\n <annotation> <math display=\"inline\" altimg=\"urn:x-wiley:09475117:media:maco202414491:maco202414491-math-0001\" xmlns=\"http://www.w3.org/1998/Math/MathML\" wiley:location=\"equation/maco202414491-math-0001.png\"><mrow><mrow><mn>700</mn><mo>\\unicode{x000B0}</mo></mrow></mrow></math></annotation>\n </semantics></math>C and <span></span><math>\n <semantics>\n <mrow>\n \n <mrow>\n <mn>900</mn>\n \n <mo>°</mo>\n </mrow>\n </mrow>\n <annotation> <math display=\"inline\" altimg=\"urn:x-wiley:09475117:media:maco202414491:maco202414491-math-0002\" xmlns=\"http://www.w3.org/1998/Math/MathML\" wiley:location=\"equation/maco202414491-math-0002.png\"><mrow><mrow><mn>900</mn><mo>\\unicode{x000B0}</mo></mrow></mrow></math></annotation>\n </semantics></math>C for up to 100 h. Both Mo-based alloys evidenced a hot corrosion attack, resulting in a uniform attack of the substrate surface. The higher Ti content of the eutectic alloy significantly reduced the formation of solid and volatile Mo oxides compared with the eutectoid alloy. After 24 h at <span></span><math>\n <semantics>\n <mrow>\n \n <mrow>\n <mn>700</mn>\n \n <mo>°</mo>\n </mrow>\n </mrow>\n <annotation> <math display=\"inline\" altimg=\"urn:x-wiley:09475117:media:maco202414491:maco202414491-math-0003\" xmlns=\"http://www.w3.org/1998/Math/MathML\" wiley:location=\"equation/maco202414491-math-0003.png\"><mrow><mrow><mn>700</mn><mo>\\unicode{x000B0}</mo></mrow></mrow></math></annotation>\n </semantics></math>C, the corrosion products formed on the eutectic alloy were only one-tenth the thickness of the layers formed on the eutectoid alloy. The corrosion products were examined with optical and electron microscopy. Semiquantitative electron probe micro analysis and X-ray diffraction measurements were used to identify the formed phases. The underlying corrosion mechanisms comprising not only hot corrosion-induced fluxing but also oxidation-induced pesting are discussed in detail.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"75 12","pages":"1610-1619"},"PeriodicalIF":1.6000,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202414491","citationCount":"0","resultStr":"{\"title\":\"Hot corrosion behavior of Mo–Si–Ti alloys\",\"authors\":\"Katharina Beck, Till König, Ekin Senvardarli, Frauke Hinrichs, Martin Heilmaier, Mathias C. 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Both Mo-based alloys evidenced a hot corrosion attack, resulting in a uniform attack of the substrate surface. The higher Ti content of the eutectic alloy significantly reduced the formation of solid and volatile Mo oxides compared with the eutectoid alloy. After 24 h at <span></span><math>\\n <semantics>\\n <mrow>\\n \\n <mrow>\\n <mn>700</mn>\\n \\n <mo>°</mo>\\n </mrow>\\n </mrow>\\n <annotation> <math display=\\\"inline\\\" altimg=\\\"urn:x-wiley:09475117:media:maco202414491:maco202414491-math-0003\\\" xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\" wiley:location=\\\"equation/maco202414491-math-0003.png\\\"><mrow><mrow><mn>700</mn><mo>\\\\unicode{x000B0}</mo></mrow></mrow></math></annotation>\\n </semantics></math>C, the corrosion products formed on the eutectic alloy were only one-tenth the thickness of the layers formed on the eutectoid alloy. The corrosion products were examined with optical and electron microscopy. 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引用次数: 0
摘要
研究了两种三元钼-硅-钛合金（共晶钼-20.0硅-52.8钛（%）和共晶钼-21.0硅-34.0钛（%））在 700° <math display="line "条件下的热腐蚀行为。%）在 700 ° <math display="inline" altimg="urn:x-wiley:09475117:media:maco202414491:maco202414491-math-0001" xmlns="http://www.w3.org/1998/Math/MathML" wiley:location="equation/maco202414491-math-0001.png"><mrow><mrow><mn>700</mn><mo>unicode{x000B0}</mo></mrow></mrow></math> C 和 900 ° <math display="inline" altimg="urn：x-wiley:09475117:media:maco202414491:maco202414491-math-0002" xmlns="http://www.w3.org/1998/Math/MathML" wiley:location="equation/maco202414491-math-0002.png"><mrow><mrow><mn>900</mn><mo>unicode{x000B0}</mo></mrow></mrow></math>摄氏 100 度。两种钼基合金都出现了热腐蚀现象，导致基体表面受到均匀腐蚀。与共晶合金相比，共晶合金中较高的 Ti 含量大大减少了固体和挥发性 Mo 氧化物的形成。在 700 ° <math display="inline" altimg="urn:x-wiley:09475117:media:maco202414491:maco202414491-math-0003" xmlns="http://www.w3.org/1998/Math/MathML" wiley:location="equation/maco202414491-math-0003.png"><mrow><mrow><mn>700</mn><mo>unicode{x000B0}</mo></mrow></mrow></math>C，共晶合金上形成的腐蚀产物厚度仅为共晶合金上形成的腐蚀层厚度的十分之一。用光学显微镜和电子显微镜对腐蚀产物进行了检测。半定量电子探针显微分析和 X 射线衍射测量用于确定所形成的相。不仅详细讨论了热腐蚀诱导通量，还讨论了氧化诱导虫蚀的基本腐蚀机制。
The hot corrosion behavior of two ternary Mo–Si–Ti alloys (eutectic Mo–20.0Si–52.8Ti (at.%) and eutectoid Mo–21.0Si–34.0Ti (at.%)) was investigated at C and C for up to 100 h. Both Mo-based alloys evidenced a hot corrosion attack, resulting in a uniform attack of the substrate surface. The higher Ti content of the eutectic alloy significantly reduced the formation of solid and volatile Mo oxides compared with the eutectoid alloy. After 24 h at C, the corrosion products formed on the eutectic alloy were only one-tenth the thickness of the layers formed on the eutectoid alloy. The corrosion products were examined with optical and electron microscopy. Semiquantitative electron probe micro analysis and X-ray diffraction measurements were used to identify the formed phases. The underlying corrosion mechanisms comprising not only hot corrosion-induced fluxing but also oxidation-induced pesting are discussed in detail.
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