In this research charecterisations of TiB 2 -Co composite coating deposited by atmospheric plasma spray have been studied. So cobalt and titanium diboride powders were mixed in percentage of 20, 32.5 and 45 weight percent of Co in ball mill, then in order to have good flowability for thermal spray were granuled by spray drier process. Appropriate powders were deposited by atmospheric plasma spray in 3 different parameters on 304 austenitic stainless steel. X-Ray diffraction of mixed powders and coatings were analysed to charecterise the constituent phases. Also morphology, microstructure and porosity of powders as well as coating were observed using scanning electron microscope. The ball on disk wear test were performed at room temperature, loads of 5, 10 and 20 N, in distance of 1000 meters to evaluate the wear resistance of coatings and substrate. Worn surfaces were analyzed to investigate wear mechanisms using scanning electron microscope. The wear volume and depth were measured by interference profilometer. cycle oxidation test in temperature of 900 °C and 40 hrs done In order to investigate the oxidation resistance of coatings. Results of SEM images of cross section of coatings illustrated that increasing Co within appropriate parameters of plasma spray comes with decreasing amperage and voltage and increasing powder feedrate, improve the quality of coating. The abrasive mechanism observed in wear test for steel substrate. Linear mass loss observed in substrate wear test. For coating wear test no mechanism identified. Mass loss of coatings with inappropriate parameters was more than substrate somehow in load of 10 N the coatings completely were ruined. Results of oxidation test illustrated that coating with less porosity showed less mass gain. Also mass gain of substrate was extremely more than coated samples. EDS analyze of oxidation sample illustrated absence of oxygen in substrate that indicates perfect protection of coating against oxidation. Keywords: TiB 2 -Co coating, Wear test, Oxidation, Thermal spray