Document Type : Original Article


Department of Materials Engineering, University of Tabriz, Tabriz, Iran


Although regarding low density and high ratio of strength to weight of titanium, the application of this metal is restricted in space industry due to its low surface properties including low wear resistance which could lead to the cold weld. For improving this property of titanium, applying protective coatings is effective. The physical parameters of wear resistance, adhesion and surface microhardness are impressive and could avoid occurance of cold weld. Therefore, in the present study, by applying plasma nitriding on chromium layer on titanium used in space structures, its tribological behavior (wear resistance, adhesion and surface microhardness) has been investigated. The results confirmed the formation of nitride chromium thin layer on titanium substrate due to the applying plasma nitriding on the chromium layer , which increasing the surface microhardness up to 1109 HV and improving the wear resistance and adhesion subsequently. The coefficient of friction is also decreased to 0.16,which can well prevent the occurrence of cold weld


Main Subjects

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