High heat loading performance of actively cooled W/Cu FGM-based components

A functionally graded material-based actively water-cooled tungsten-copper mockup with a dimension of 30 mm×30 mm×25 mm was designed and fabricated by infiltration-brazing method. The thicknesses of the pure W layer and W/Cu graded layer were 2 and 3 mm, respectively. High heat flux tests were performed on the mockup using an e-beam device. There is no damage occurring on the joint after heat loading at 5 MW/m2. The temperature on the pure W surface is less than 500°C after irradiation for 100 s at 5 MW/m2, while the temperature on the brazing seam/copper surface is around 200°C.