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本文利用抗弯强度试验、扫描电镜及能谱分析研究了镀Mo金刚石在Fe基、Ni基、Cu基及Co基结合剂中的界面结合状态。结果发现：在700－840℃热压条件下，结合剂中的主要组元均已扩散到达金刚石表面；Mo镀层采与金刚石形成强的界面结合；在抗弯强度试验中，Mo层基本上与结合剂一起被剥离金刚石表面。金刚石表面镀Mo后，其Fe基、Ni基、Cu基复合材料的抗弯强度均下降，而其Co基复合材料的抗弯强度显著上升。抗弯强度的变化主要是由于Mo对结合剂的局部强化、硬化并由此引起的复合材料内部的热应力的改变以及Mo层改变了结合剂对金刚石的浸润等因素引起的。
In this paper, the interfacial bonding of Mo-coated diamond in Fe-based, Ni-based, Cu-based and Co-based binders was studied by means of flexural strength test, SEM and EDS. The results show that the main components of the bonding agent have all reached the diamond surface under the hot pressing condition of 700-840 ℃. Mo coating and diamond strongly bond with each other. In the flexural strength test, Mo layer is almost the same as The bonding agent is peeled off the diamond surface together. The flexural strength of Fe-based, Ni-based and Cu-based composites decreased when the diamond surface was Mo-plated, while the flexural strength of the Co-based composites increased significantly. The change of flexural strength is mainly caused by the local strengthening of Mo to the bonding agent, the hardening and the change of the thermal stress inside the composite caused by Mo, and the change of the wetting of the diamond by the bonding agent.