Dissimilar joints of graphite and TZM alloys were obtained via vacuum diffusion bonding with a Zr interlayer. The influence of interfacial structure on the microstructure and mechanical properties of graphite/TZM alloy joints were investigated. The microstructure and compositions on the interface were observed and analyzed, and the tensile shear strength of the joints were evaluated. The interfacial morphologies showed good metallurgical combination with no apparent defects. A transition layer with a width of approximately 200 μm was formed. The interface products were squeezed into triangular grooves in the graphite, forming a serrated structure in the joint with a triangular groove structure. The microstructures in the transition layer were Mo₂Zr, ZrC and solid solution. Some eutectic penetrated into the porous graphite pores of the adjacent graphite matrix, forming an island-like morphology. The welding mechanism was consistent with transient liquid phase bonding. The interfacial shear strength of the joint with a triangular groove structure could reach 38 MPa, which was higher than that of graphite. Fracture occurred partly in the graphite and partly in the transition layer. The serrated structure between the graphite and the transition layer effectively improved the bonding strength.

通过与Zr夹层的真空扩散结合获得石墨和TZM合金的异种接头。研究了界面结构对石墨/ TZM合金接头组织和力学性能的影响。观察和分析界面上的微观结构和成分，并评估接头的拉伸剪切强度。界面形态显示出良好的冶金组合，没有明显的缺陷。形成具有约200μm的宽度的过渡层。将界面产物挤入石墨中的三角形凹槽中，在具有三角形凹槽结构的接头中形成锯齿状结构。过渡层的微观结构为Mo ₂Zr，ZrC和固溶体。一些共晶渗透到相邻石墨基体的多孔石墨孔中，形成岛状形态。焊接机理与瞬时液相键合一致。具有三角形槽结构的接头的界面剪切强度可以达到38 MPa，高于石墨。断裂部分发生在石墨中，部分发生在过渡层中。石墨和过渡层之间的锯齿状结构有效地提高了粘结强度。