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High-Temperature Dielectric and Microwave Absorption Property of Atmospheric Plasma Sprayed $Al_{2}O_{3}-MoSi_{2}$-Cu Composite Coating
| Content Provider | MDPI |
|---|---|
| Author | Gao, Cheng Jiang, Yangsheng Cai, Dayong Xu, Jinyong Ding, Jia |
| Copyright Year | 2021 |
| Description | $Al_{2}O_{3}-MoSi_{2}$ coating has excellent high-temperature stability. On this basis, $Al_{2}O_{3}-MoSi_{2}$-Cu composite high-temperature absorbing coating was prepared by atmospheric plasma spraying method. The phase transition characteristics of $Al_{2}O_{3}-MoSi_{2}$-Cu spraying feedstock under high temperatures were analyzed by thermogravimetric test, the phase analysis of coating was performed by an in situ XRD test at different temperatures, and the microstructure of the coating was characterized by SEM. The test results of high-temperature microwave absorption performance show that, in high-temperature air atmosphere, the Cu in the coating is gradually transformed into $Cu_{2}$O by oxygen atom diffusion, and the microwave absorption performance of the coating gradually increases with the increase in temperature. The 1.7 mm-thick coating at 500 °C has the best absorbing performance with a reflection loss (RL) value of −17.96 dB and an effective absorbing bandwidth (RL < −10 dB) in X-band of 2.42 GHz. The prepared $Al_{2}O_{3}-MoSi_{2}$-Cu composite high-temperature absorbing coating takes into account the dual advantages of high-temperature stability and high-temperature absorbing properties. |
| Starting Page | 1029 |
| e-ISSN | 20796412 |
| DOI | 10.3390/coatings11091029 |
| Journal | Coatings |
| Issue Number | 9 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-08-27 |
| Access Restriction | Open |
| Subject Keyword | Coatings Atmospheric Plasma Spraying Thermal Analysis Absorbing Coating Al2o3-mosi2-cu |
| Content Type | Text |
| Resource Type | Article |
