Ni-45Cr　coating　was　plasma　sprayed　at　different　spray　distances　in　order　to　clarify　the　influence　of　spray　distance　on　the　mechanical　properties.　The　mechanical　properties　of　Ni-45Cr　coatings　include　the　fracture　toughness,　elastic　modulus　and　Poisson＇s　ratio　parallel　to　lamellar　plane.　The　fracture　toughness　of　plasma-sprayed　Ni-45Cr　coating　in　terms　Of　Critical　strain　energy　release　rate　(G,,)　was　investigated　using　a　tapered　double　cantilever　beam　approach.　The　elastic　modulus　and　Poisson＇s　ratio　parallel　to　lamellar　plane　were　obtained　by　measuring　the　relation　of　stress　and　strain　using　strain　gauges.　It　was　found　that　the　fracture　toughness　of　plasma　sprayed　Ni-45Cr　coatings　was　not　significantly　influenced　by　spray　distance　up　to　190　rum　and　further　increase　in　spray　distance　to　2　10　turn　resulted　in　an　evident　decrease　in　the　fracture　toughness　of　the　coatings.　Moreover,　spray　distance　showed　minor　effect　on　the　elastic　modulus　and　Poisson＇s　ratio　parallel　to　lamellar　plane　of　Ni-45Cr　coating.　The　examination　of　fractured　surface　revealed　that　the　fracture　toughness　of　plasma-sprayed　Ni-45Cr　coatings　is　related　with　the　lamellar　bonding.