محمدرضا بابائي زارج

In this research, composite coatings of yttria-stabilized zirconia (YSZ) reinforced with silicon carbide (SiC) and tungsten carbide (WC) were fabricated and comprehensively eva‎luated to enhance microwave absorption properties. These coatings were deposited onto a suitable substrate using plasma spraying. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to investigate the structural and microstructural characteristics of the coatings. Rockwell hardness tests were conducted to assess the mechanical properties. Additionally, vector network analyzer (VNA) measurements were utilized to study the electromagnetic wave absorption behavior. Results demonstrated that the addition of 20 wt% SiC to the YSZ matrix significantly improved microwave absorption properties. This composite exhibited the highest absorption with a remarkable reduction in reflection loss of 34 dB at a frequency of 11.5 GHz. In contrast, the addition of WC did not have a significant impact on the improvement of absorption properties. Microstructural analysis revealed a porous structure with the presence of molten grains and reinforcing particles within the coatings. This porous structure, coupled with the intrinsic wave-absorbing properties of SiC, played a crucial role in enhancing the absorption properties of the composite. Moreover, Rockwell hardness tests confirmed a significant increase in the hardness of the SiC-containing coatings compared to the pure YSZ sample.

پوشش‌هاي زيركونياي پايدارشده با ايتريا , كاربيد سيليكون , كاربيد تنگستن , پاشش پلاسما , خواص جذب امواج مايكروويو

Yttria-stabilized zirconia (YSZ) coatings , Silicon carbide (SiC) , Tungsten carbide (WC) , Plasma spraying , Microwave absorption

mohammadreza babaei zarch

seyed mohammad mirkazemi