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Tungsten (W) coating was prepared on SiC coated C/C composites by supersonic atmosphere plasma spraying (SAPS), aiming to improve their anti-ablation property. Under oxyacetylene torch, W coating could protect substrate above 60 s under heat flux of 2400 kW/m2. However, oxidization destroyed the intergranular and interlayer bonding of as-sprayed W coating during ablation. As a result, when heat flux...
A WC-SiC double-layer coating was prepared on C/C composites to improve their anti-ablation property. The WC outer layer was designed to withstand high heat flux by its high mechanical strength, the SiC inner layer could transform into SiO2 to block oxygen by its good anti-oxygen permeability. During ablation process, amounts of SiO2 filled into the pores and cracks of WC outer layer, forming a steadily...
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