【摘要】 通过ＳＥＭ、Ｒａｍａｎ光谱、ＸＲＤ在ＰＤＣ样品横断面上测试了ＰＤＣ材料的组成和结构；通过ＥＤＸ、ＥＤＷ在ＰＤＣ样品纵断面上测试了ＰＤＣ界面结构及粘结元素Ｃｏ、Ｗ的分布；通过剪切和淬火压溃试验测试了ＰＤＣ界面结合强度和界面耐热性能．测试结果表明，φ２５ｍｍＰＤＣ复合材料的抗弯强度σｂ１１６０ＭＰａ；界面结合强度τ２．６７ＧＰａ ；耐热温度７４２℃；平均磨耗比 Ｑ为１２．３×１０４；其中心点相对边缘点的耐磨性降幅为１９．２％．更多还原

【Abstract】 The composition and structure of the polished cross section of 25mm-diameter PDC were investigated by SEM, Raman spectrum and XRD. The interface structure and the distri- bution of bonding phases of the polished vertical section of the PDC were analyzed by EDW, EDX, and the properties of the combined-interface of the PDC were measured by shear, quenching and compression test. The test results show that the 25mm-diameter PDC possesses properties as follows: transverse rapture strength σb 1160MPa; heat-resistance temperature 742℃; bond- ing strength τ2.67GPa; average wear-resistance Q 12.3×104 with only 19.2% decrease from the peripheral point to the central point.更多还原