Activities of HIP joining of plasma-facing armors in the blanket first-wall in Korea

•HIP joints of Be/CuCrZr, Be/FMS, W/FMS were demonstrated.•The process conditions for HIP joining were developed.•For the joining of Be, coating interlayers as well as thick diffusion barrier was developed.•For the joining of W, double-staged HIP was applied for the joint integrity.•No significant defects nor a brittle failure were observed along the joint interface.