Pages 5001-5006

CeO2, La2O3, Y2O3, and V2O5 were added in an Fe-based matrix, and then the matrices were hot pressed at 700 °C. The thermal expansion coefficients and fracture stresses of the matrices were investigated, and residual stresses between the diamonds and matrices were simulated by finite element analysis. The weight losses of the specimens with diamonds were measured using a pin-on-disk wear testing rig. The surfaces from the wear tests were also examined by a scanning electron microscope. Results showed that the residual stress, difference of residual stress from fracture stress and weight loss all decreased after adding Y2O3, La2O3, V2O5, and CeO2, and the decrement increased in the same order. Among the four oxides, adding V2O5 and CeO2 remarkably improved the diamond retention capacity of the Fe-based matrix.