TiB2-Ni　cermet　coatings　were　deposited　by　atmospheric　plasma　spraying　and　high-velocity　oxy-fuel　(HVOF)　spraying　with　an　agglomerated　powder.　The　microstructure　of　the　coatings　was　investigated　by　scanning　and　transmission　electron　microscopy,　electron　microprobe　analysis　and　x-ray　diffraction　analysis.　A　model　describing　the　microstructure　evolution　during　the　spray　process　was　proposed.　As　the　sprayed　particles　experienced　high-temperature　processing　in　the　plasma　jet,　the　original　Ni3B　binder　was　quickly　oxidized　and　then　a　part　of　TiB2　particles　was　dissolved　in　the　melt　resulting　in　the　formation　of　a　ternary　Ni-Ti-B　phase　and　fine　TiB2　precipitates.　Oxide　was　also　observed　at　the　periphery　of　the　sprayed　splats.　The　combustion　flame　having　lower　temperature　significantly　alleviated　the　dissolution　of　TiB2　as　well　as　oxidation　of　Ni3B　binder,　so　that　most　of　the　original　phases　were　retained　in　the　HVOF-sprayed　coating.　The　mechanical　properties　of　the　coating　sprayed　by　the　two　different　techniques　showed　a　significant　difference,　in　terms　of　coating　hardness　and　fracture　toughness.