Successful joining of heat conducting materials, to high-temperature components is of significant importance for heat management in nuclear power plants and liquid propellant launch vehicles. Solid-state processes are considered for joining such dissimilar materials. Diffusion bonding of a copper alloy (C18150) to a Ni-based superalloy (GH4169) was investigated in this work. The bonding trials at 900°C for 60 min under a constant 10 MPa pressure led to formation of sound joints free from intermetallic, pores, voids and discontinuities. Conventional tensile testing led to the failure within the copper alloy and away from the joint. Due to the softening of the copper alloy during the bonding process, the maximum tensile strength of the as-bonded copper alloy was only 48% of its as-received strength. Post-bonding solution treatment at 960°C for 60 min followed by ageing at 450°C for 3.5 h, restored the tensile strength of the copper alloy up to 77%.

导热材料与高温部件的成功连接对于核电站和液体推进剂运载火箭的热量管理至关重要。考虑使用固态工艺来连接这种不同的材料。在这项工作中，研究了铜合金（C18150）与镍基高温合金（GH4169）的扩散结合。在恒定的10 MPa压力下于900°C进行60分钟的粘结试验，导致形成无金属间，无孔，无空隙和不连续的健全接头。传统的拉伸测试导致铜合金内部以及远离接头的破坏。由于铜合金在粘结过程中会软化，因此粘结后的铜合金的最大抗拉强度仅为其接收强度的48％。