To　improve　the　high-temperature　ablation　resistance　of　Ta-10W　alloy　as　a　hot-end　component　of　high-speed　craft,　a　novel　multilayered　YSZ-MoSi2-Mo　(YMM)　gradient　coating　was　designed　and　prepared　using　plasma　spraying.　The　coating　consisted　of　a　YSZ　surface　layer　(∼250　μm),　a　MoSi2-YSZ　gradient　middle　layer　(∼150　μm),　and　a　Mo-MoSi2　bottom　layer　(∼100　μm).　The　ablation　behavior　of　the　coating　was　investigated　using　a　plasma　flame　at　2100　°C,　2200　°C,　2300　°C,　and　2400　°C　for　300　s,　respectively.　Results　showed　that　the　coating　remains　intact　during　plasma　ablation　at　2100　°C.　However,　bulging　(∼199.2　μm)　at　the　ablation　center　occurred　at　2200　°C,　while　the　depth　of　the　oxygen　erosion　was　about　370　μm.　Besides,　the　Mo-MoSi2　bottom　layers　were　incompletely　oxidized　and　damaged　under　all　the　ablation　conditions.　This　indicates　that　the　YMM　coating　could　effectively　protect　the　Ta-10W　alloy　at　ablation　temperatures　ranging　from　2100　to　2400　°C　for　300　s.　This　excellent　ablation　resistance　of　the　YMM　coating　was　mainly　attributed　to　the　damage　resistance　from　the　plasma　flame　of　the　YSZ　layer　as　well　as　the　oxygen　barrier　effect　and　self-healing　effect　to　cracks　of　SiO2　formed　from　MoSi2.　Besides,　the　multilayered　gradient　structure　of　the　coating　effectively　reduced　the　mismatch　between　the　coefficient　of　thermal　expansion　of　the　YSZ　layer　and　the　Ta-10W　alloy.　©　2025　Elsevier　Ltd　and　Techna　Group　S.r.l.