Ablation behaviour of carbon fibre ultra-high temperature composites at oblique angles of attack

Oxyacetylene torch testing was performed at a range of angles attack on Cf/ZrB2-SiC-Y2O3 composites, from 10° to 90°. The ablation behaviour studied in-situ with thermography, and the post-ablation morphologies investigated optically elemental analysis. Significantly lower surface temperatures were observed oblique leading less damage in terms both oxidation extent material removal. Rudimentary modelling gas stream impinging perfect showed that angular variation also led significant drop pressure more attack, commensurate increase shear stress. oxide formed during seemed mainly correspond temperature distribution apparently susceptible higher than This study elucidated some interesting aspects modified test new parameter ranges which may be useful targeted screening.