The　Mo　and　Mo　+　30%　(NiCrBSi)　coatings　were　fabricated　on　Al-10Si　alloy　by　supersonic　plasma　spraying.　The　microstructure,　microhardness,　bonding　strength　and　wear　resistance　of　the　coatings　were　tested　and　analyzed.　The　results　show　that　the　both　coatings　have　good　tribological　behaviors　under　the　boundary　lubrication　conditions,　but　the　wear　resistance　of　Mo　+　30%　(NiCrBSi)　coating　is　better　than　that　of　the　pure　Mo　one,　due　to　the　solution　hardening　of　the　Ni-Cr　solid　solution　and　the　dispersion　strengthening　of　the　hard　interstitial　compounds　such　as　Cr2B　and　Cr7C3　in　the　Mo　+　30%　(NiCrBSi)　coating.