Effect of loading spectrum with different single pulsing time on the cyclic ablation of C/C-SiC-ZrB2-ZrC composites in plasma

To support the application for piston of advanced internal combustion engine and pantograph slide plate of high-speed rail, cyclic ablation with different loading spectrums in alternate plasma combustion and compressed air flow were performed by adjusting single impacting time to understand the characteristics of C/C-SiC-ZrB2-ZrC composites in high frequent pulsing fluid at ultra-high temperature. When the loading time increased from 0.5 to 5 s, the ablation rates rose sharply while the surface temperature changed incrementally. Ablation morphology indicated that the change of dominant ablation mechanism from mechanical erosion to chemical reaction resulted in the sharp rise of the ablation rates.

Automated summary

Adjusting single impacting time to perform cyclic ablation with different loading spectra in alternate plasma combustion and compressed air flow provides insights into the characteristics of C/C-SiC-ZrB2-ZrC composites in high frequency pulsing fluid at ultra-high temperatures. Increasing loading time resulted in a sharp rise in ablation rates, with incremental changes in surface temperature. Ablation morphology indicated a shift from mechanical erosion to chemical reaction as the dominant ablation mechanism, leading to the significant increase in ablation rates.