Abstract
This study elucidates the relationship between the wear performance of a clad layer and the bonding strength of interface between the reinforcing phase and the matrix. A simple mathematical model is proposed to elucidate the differences among the wear performance of various clad layers with different reinforcing particles. Analytical results indicate that, at the beginning of the run-in process, the wear resistance of a clad layer depends on the strength of the matrix, the hardness and geometric characteristics of the reinforcing phases and the bonding strength of the interface between the matrix and the reinforcing phase. In some special cases, this simple mathematical model can be used to estimate the critical bonding strength of an interface between reinforcement and matrix for wear performance. According to the analysis, the reinforcing phase has complex geometric characteristics that enhance mechanical interlocking. More complicated shape of reinforcement can prevent the reinforcing phase from being pulled out and enhance the wear performance of the clad layer. Moreover, wear tests of TiC-W and WC-Ti clad specimens are used to verify the qualitative correctness of the model.
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