Two　micro-nano　structural　NdYbZr2O7　thermal　barrier　coatings　(TBCs)　inspired　by　lotus　leaf　were　fabricated　by　ultrafast　laser　direct　writing　technology,　which　are　defined　as　coating　A　and　B　respectively.　The　biomimetic　coatings　exhibit　an　outstanding　volcanic　ash　repellence　within　a　short-term　period　(1200　°C/10　min),　while　this　performance　dramatically　deteriorates　with　time　due　to　destruction　of　micro-conoids　caused　by　the　chemical　reaction　rather　than　the　high-temperature　sintering　of　nanoparticles.　Additionally,　this　chemical　reaction　is　responsible　for　the　formation　of　dense　reaction　layer　composed　of　c-ZrO2　and　apatite　grains　in　the　sides　of　conoids,　which　effectively　protects　the　underneath　coating　substrate　from　the　infiltration　and　corrosion　of　molten　volcanic　ash.　Thermal　conductivity　of　these　two　laser-ablated　coatings　increases　approximately　30　%　than　that　of　as-sprayed　counterpart　because　of　both　the　increase　in　dispersity　of　interface　discontinuity　and　the　decrease　in　coating　thickness.　During　the　wear　process,　the　conoids　are　susceptible　to　abrupt　fracture　in　the　presence　of　load　stress,　as　well　as　the　initial　deposited　nanoparticles,　resulting　in　the　reduce　of　wear　resistance　against　hard　debris.　©　2024　Elsevier　Ltd　and　Techna　Group　S.r.l.