The　near-nanocrystalline　WC-10Co　alloys　were　prepared　by　spark　plasma　sintering　(SPS)　using　sub-micron　WC/nano-Co　and　sub-micron　WC/micron　Co　as　the　raw　powders.　The　SPS　process,　the　microstructures　and　properties　of　the　sintered　WC-Co　bulks　were　investigated　systematically.　Compared　with　the　bulk　prepared　using　the　sub-micron　WC/nano-Co　mixed　powders,　the　sintered　bulk　with　the　sub-micron　WC/micron　Co　as　raw　powders　and　a　pre-treatment　of　ball-milling　has　a　high　density,　and　hardness　of　HRA94.5　and　fracture　toughness　of　13.50　MPa　m(1/2),　respectively,　indicating　an　excellent　combination　of　mechanical　properties.　The　densification　mechanisms　of　SPS　sintered　near-nanocrystalline　WC-Co　alloys　have　been　analyzed,　and　for　the　first　time　the　effects　of　scale　combination　and　contact　condition　of　WC/Co　raw　powders　on　the　microstructure　and　properties　of　the　bulk　have　been　proposed.　(C)　2007　Elsevier　B.V.　All　rights　reserved.