High Temperature Oxidation Behavior of an Equimolar Cr-Mn-Fe-Co High-Entropy Alloy
The oxidation behavior of an equimolar Cr-Mn-Fe-Co high-entropy alloy (HEA) processed by 3D laser printing was investigated at 700 °C and 900 °C. The oxidation kinetics of the alloy followed the parabolic rate law, and the oxidation rate constant increased with the rising of the temperature. Inward...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-07-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/14/15/4259 |
| _version_ | 1797525413528862720 |
|---|---|
| author | Lin Wang Quanqing Zeng Zhibao Xie Yun Zhang Haitao Gao |
| author_facet | Lin Wang Quanqing Zeng Zhibao Xie Yun Zhang Haitao Gao |
| author_sort | Lin Wang |
| collection | DOAJ |
| description | The oxidation behavior of an equimolar Cr-Mn-Fe-Co high-entropy alloy (HEA) processed by 3D laser printing was investigated at 700 °C and 900 °C. The oxidation kinetics of the alloy followed the parabolic rate law, and the oxidation rate constant increased with the rising of the temperature. Inward diffusion of oxygen and outward diffusion of cations took place during the high-temperature oxidation process. A spinel-type oxide was formed on the surface, and the thickness of the oxide layer increased with the rising of experimental temperature or time. The exfoliation of the oxide layer took place when the test was operated at 900 °C over 12 h. During oxidation tests, the matrix was propped open by oxides and was segmented into small pieces. The formation of loose structures had great effects on the high-temperature oxidation resistance of the HEA. |
| first_indexed | 2024-03-10T09:12:31Z |
| format | Article |
| id | doaj.art-e006267c385f4d37b2b10d884023d4d6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T09:12:31Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-e006267c385f4d37b2b10d884023d4d62023-11-22T05:54:08ZengMDPI AGMaterials1996-19442021-07-011415425910.3390/ma14154259High Temperature Oxidation Behavior of an Equimolar Cr-Mn-Fe-Co High-Entropy AlloyLin Wang0Quanqing Zeng1Zhibao Xie2Yun Zhang3Haitao Gao4College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaLight Alloys Research Institute, Central South University, Changsha 410083, ChinaCollege of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaCollege of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaCollege of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaThe oxidation behavior of an equimolar Cr-Mn-Fe-Co high-entropy alloy (HEA) processed by 3D laser printing was investigated at 700 °C and 900 °C. The oxidation kinetics of the alloy followed the parabolic rate law, and the oxidation rate constant increased with the rising of the temperature. Inward diffusion of oxygen and outward diffusion of cations took place during the high-temperature oxidation process. A spinel-type oxide was formed on the surface, and the thickness of the oxide layer increased with the rising of experimental temperature or time. The exfoliation of the oxide layer took place when the test was operated at 900 °C over 12 h. During oxidation tests, the matrix was propped open by oxides and was segmented into small pieces. The formation of loose structures had great effects on the high-temperature oxidation resistance of the HEA.https://www.mdpi.com/1996-1944/14/15/4259metals and alloys3D printingoxidation |
| spellingShingle | Lin Wang Quanqing Zeng Zhibao Xie Yun Zhang Haitao Gao High Temperature Oxidation Behavior of an Equimolar Cr-Mn-Fe-Co High-Entropy Alloy Materials metals and alloys 3D printing oxidation |
| title | High Temperature Oxidation Behavior of an Equimolar Cr-Mn-Fe-Co High-Entropy Alloy |
| title_full | High Temperature Oxidation Behavior of an Equimolar Cr-Mn-Fe-Co High-Entropy Alloy |
| title_fullStr | High Temperature Oxidation Behavior of an Equimolar Cr-Mn-Fe-Co High-Entropy Alloy |
| title_full_unstemmed | High Temperature Oxidation Behavior of an Equimolar Cr-Mn-Fe-Co High-Entropy Alloy |
| title_short | High Temperature Oxidation Behavior of an Equimolar Cr-Mn-Fe-Co High-Entropy Alloy |
| title_sort | high temperature oxidation behavior of an equimolar cr mn fe co high entropy alloy |
| topic | metals and alloys 3D printing oxidation |
| url | https://www.mdpi.com/1996-1944/14/15/4259 |
| work_keys_str_mv | AT linwang hightemperatureoxidationbehaviorofanequimolarcrmnfecohighentropyalloy AT quanqingzeng hightemperatureoxidationbehaviorofanequimolarcrmnfecohighentropyalloy AT zhibaoxie hightemperatureoxidationbehaviorofanequimolarcrmnfecohighentropyalloy AT yunzhang hightemperatureoxidationbehaviorofanequimolarcrmnfecohighentropyalloy AT haitaogao hightemperatureoxidationbehaviorofanequimolarcrmnfecohighentropyalloy |