This　chapter　discusses　the　basic　evaluation　technologies　for　the　investigation　of　the　physical,　thermal,　and　mechanical　properties　of　the　thermal　barrier　coatings　(TBCs),　as　well　as　the　experimental　methods　to　evaluate　thermal　stability　and　chemical　stability　performance.　All　the　technologies　involved　in　this　chapter　were　already　successfully　conducted　to　analyze　the　properties　and　performance　of　the　TBCs.　Specifically,　the　techniques　to　evaluate　the　density,　porosity,　phase,　and　lattice　structures　are　summarized　to　evaluate　the　physical　properties　in　Section　9.1.　For　the　mechanical　properties,　we　will　focus　on　the　hardness,　elastic　properties,　bond　strength,　fracture　toughness,　erosion,　and　residual　stress　in　Section　9.2.　The　approaches　to　detect　the　melting　point,　specific　heat　capacity,　thermal　conductivity,　and　coefficient　of　thermal　expansion　of　TBCs　are　combined　to　analyze　typical　thermal　properties　in　Section　9.3.　To　simulate　the　operational　environment,　the　thermal　cycling,　thermal　gradient　fatigue　test,　oxidation　test,　corrosion　evaluation　techniques　for　hot-salt　corrosive　substance,　the　calcium–magnesium–aluminum–silicon　oxide　(CMAS),　and　water　vapor　are　used　to　systematically　investigate　the　operational　performance　of　the　TBCs　in　Sections　9.4　and　9.5.　The　properties　and　performance　evaluation　technologies　described　in　this　chapter　provide　a　fundamental　view　for　the　research　and　development　of　novel　TBCs　materials.　©　2023　Elsevier　Ltd.　All　rights　reserved.