Rare Earth Elements Enhanced the Oxidation Resistance of Mo-Si-Based Alloys for High Temperature Application: A Review
Traditional refractory materials such as nickel-based superalloys have been gradually unable to meet the performance requirements of advanced materials. The Mo-Si-based alloy, as a new type of high temperature structural material, has entered the vision of researchers due to its charming high temper...
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doaj-2a75bdd186de48a6b7834a497a08a78a2021-09-25T23:56:38ZengMDPI AGCoatings2079-64122021-09-01111144114410.3390/coatings11091144Rare Earth Elements Enhanced the Oxidation Resistance of Mo-Si-Based Alloys for High Temperature Application: A ReviewLaihao Yu0Yingyi Zhang1Tao Fu2Jie Wang3Kunkun Cui4Fuqiang Shen5School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, ChinaSchool of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, ChinaSchool of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, ChinaSchool of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, ChinaSchool of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, ChinaSchool of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, ChinaTraditional refractory materials such as nickel-based superalloys have been gradually unable to meet the performance requirements of advanced materials. The Mo-Si-based alloy, as a new type of high temperature structural material, has entered the vision of researchers due to its charming high temperature performance characteristics. However, its easy oxidation and even “pesting oxidation” at medium temperatures limit its further applications. In order to solve this problem, researchers have conducted large numbers of experiments and made breakthrough achievements. Based on these research results, the effects of rare earth elements like La, Hf, Ce and Y on the microstructure and oxidation behavior of Mo-Si-based alloys were systematically reviewed in the current work. Meanwhile, this paper also provided an analysis about the strengthening mechanism of rare earth elements on the oxidation behavior for Mo-Si-based alloys after discussing the oxidation process. It is shown that adding rare earth elements, on the one hand, can optimize the microstructure of the alloy, thus promoting the rapid formation of protective SiO<sub>2</sub> scale. On the other hand, it can act as a diffusion barrier by producing stable rare earth oxides or additional protective films, which significantly enhances the oxidation resistance of the alloy. Furthermore, the research focus about the oxidation protection of Mo-Si-based alloys in the future was prospected to expand the application field.https://www.mdpi.com/2079-6412/11/9/1144Mo-Si-based alloysalloyingrare earth elementsoxidation behaviormechanism |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Laihao Yu Yingyi Zhang Tao Fu Jie Wang Kunkun Cui Fuqiang Shen |
spellingShingle |
Laihao Yu Yingyi Zhang Tao Fu Jie Wang Kunkun Cui Fuqiang Shen Rare Earth Elements Enhanced the Oxidation Resistance of Mo-Si-Based Alloys for High Temperature Application: A Review Coatings Mo-Si-based alloys alloying rare earth elements oxidation behavior mechanism |
author_facet |
Laihao Yu Yingyi Zhang Tao Fu Jie Wang Kunkun Cui Fuqiang Shen |
author_sort |
Laihao Yu |
title |
Rare Earth Elements Enhanced the Oxidation Resistance of Mo-Si-Based Alloys for High Temperature Application: A Review |
title_short |
Rare Earth Elements Enhanced the Oxidation Resistance of Mo-Si-Based Alloys for High Temperature Application: A Review |
title_full |
Rare Earth Elements Enhanced the Oxidation Resistance of Mo-Si-Based Alloys for High Temperature Application: A Review |
title_fullStr |
Rare Earth Elements Enhanced the Oxidation Resistance of Mo-Si-Based Alloys for High Temperature Application: A Review |
title_full_unstemmed |
Rare Earth Elements Enhanced the Oxidation Resistance of Mo-Si-Based Alloys for High Temperature Application: A Review |
title_sort |
rare earth elements enhanced the oxidation resistance of mo-si-based alloys for high temperature application: a review |
publisher |
MDPI AG |
series |
Coatings |
issn |
2079-6412 |
publishDate |
2021-09-01 |
description |
Traditional refractory materials such as nickel-based superalloys have been gradually unable to meet the performance requirements of advanced materials. The Mo-Si-based alloy, as a new type of high temperature structural material, has entered the vision of researchers due to its charming high temperature performance characteristics. However, its easy oxidation and even “pesting oxidation” at medium temperatures limit its further applications. In order to solve this problem, researchers have conducted large numbers of experiments and made breakthrough achievements. Based on these research results, the effects of rare earth elements like La, Hf, Ce and Y on the microstructure and oxidation behavior of Mo-Si-based alloys were systematically reviewed in the current work. Meanwhile, this paper also provided an analysis about the strengthening mechanism of rare earth elements on the oxidation behavior for Mo-Si-based alloys after discussing the oxidation process. It is shown that adding rare earth elements, on the one hand, can optimize the microstructure of the alloy, thus promoting the rapid formation of protective SiO<sub>2</sub> scale. On the other hand, it can act as a diffusion barrier by producing stable rare earth oxides or additional protective films, which significantly enhances the oxidation resistance of the alloy. Furthermore, the research focus about the oxidation protection of Mo-Si-based alloys in the future was prospected to expand the application field. |
topic |
Mo-Si-based alloys alloying rare earth elements oxidation behavior mechanism |
url |
https://www.mdpi.com/2079-6412/11/9/1144 |
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