High-performance microwave absorption properties of Ti3SiC2/Al2O3 coatings prepared by plasma spraying
Source abstract
Abstract
The Ti3SiC2/Al2O3 coatings were prepared by plasma spraying process for the microwave absorption application. The coatings showed a dense structure with a few pores and unmelted region, and the Ti3SiC2 distributes uniformly in the coatings. The XRD was used to identify the phase composition of the coatings. The results indicated that the as-sprayed Ti3SiC2/Al2O3 coatings were composed of α-Al2O3 and γ-Al2O3, Ti3SiC2, TiC and Ti5Si3. The TiC and Ti5Si3 phases resulted from the Ti3SiC2 decomposition during the plasma spraying process. The complex permittivity of Ti3SiC2/Al2O3 coatings enhanced significantly with increasing the Ti3SiC2 content. When the Ti3SiC2 content was 20 wt. % and the coating thickness was 1.3 mm, the RL value of the coating can reach a minimum of − 24.4 dB at 11.1 GHz and RL value ≤ − 10 dB bandwidth in the frequency range of 10.1–12.4 GHz. Spherical instrumented scratch had been carried out on the Ti3SiC2/Al2O3 coatings to investigate the single-point abrasive wear behavior. Typical brittle fracture such as microcracks in the residual groove and grain dislodgement was observed in Ti3SiC2/Al2O3 coatings.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electromagnetic wave absorption materials · MXene and MAX Phase Materials · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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