Because the synthesis of PDC belongs to high temperature and high pressure(HPHT)sintering,and to liquid phase sintering,its synthesis temperature and synthesis pressure must make the diamond in the thermodynamic stability zone,that is,the lowest value of the synthesis pressure should be higher than the equilibrium pressure correspond-ing to the synthesis temperature,so as to prevent excessive graphitization of diamond.Therefore,the temperature and pressure are the important parameters affecting the PDC properties.Through the detection of wear resistance and impact resistance,the perform-ance difference of PDC under different synthetic pressure and synthetic temperature was studied,and the influence mechanism of temperature and pressure were analyzed,which has certain guiding significance for the synthesis of diamond composite sheet.The results show that increasing the synthesis pressure of diamond composite sheet can improve the wear resistance and impact resistance under the appropriate temperature conditions.Un-der the appropriate pressure conditions,the synthesis temperature of the diamond com-posite sheet needs a more appropriate range.
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