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Fabrication of TiC–Fe cermet coating by plasma spraying of Fe–Ti–C powder using sucrose as carbon source

Abstract A mixture of ferrotitanium and sucrose was heated to carbonise the sucrose, so the ferrotitanium particles were bound by the carbon obtained from the pyrolysis of sucrose. Then a Fe–Ti–C composite powder was made for reactive thermal spraying, which could avoid separation of Ti and C during spraying. The carbon is a reactive constituent as well as the binder in the composite powder. While this powder was used to deposit cermet coating by plasma spraying, a mass of TiC particles were in situ synthesised and uniformly distributed within metallic matrix. Average microhardness and surface hardness of the TiC–Fe coating are about 1672·5 HV0·2 and 91·4 HR(15 N) respectively. Adhesive strength value of the coating reaches 61·86 MPa. Finally, the cermet coating has good wear resistance performance.