A process of forming a laminate structure, comprising: laying a first refractory metal core in a powder bed comprising powder bed material, said first refractory metal core having exterior surfaces, a first side and a second side opposite said first side, and being positioned with said first side on top of said powder bed material; depositing additional powder bed material over said first refractory metal core second side; laying a second refractory metal core over said first refractory metal core, said second refractory metal core having exterior surfaces, a first side and a second side opposite said first side, and being positioned with said first side on top of said first refractory metal core second side with powder bed material in between said first refractory metal core second side and said second refractory metal core first side; depositing additional powder bed material over said second refractory metal core second side and exterior surfaces; and fusing said powder bed material and said additional powder bed material; wherein the method further comprises: pre-assembling said first refractory metal core with said second refractory metal core prior to fusing said powder bed material; forming a powder bed outer layer coating over said pre-assembled first refractory metal core and said second refractory metal core; and dipping said pre-assembled first refractory metal core and said second refractory metal core into a fluidized powder bed. laying a first refractory metal core in a powder bed comprising powder bed material, said first refractory metal core having exterior surfaces, a first side and a second side opposite said first side, and being positioned with said first side on top of said powder bed material; depositing additional powder bed material over said first refractory metal core second side; laying a second refractory metal core over said first refractory metal core, said second refractory metal core having exterior surfaces, a first side and a second side opposite said first side, and being positioned with said first side on top of said first refractory metal core second side with powder bed material in between said first refractory metal core second side and said second refractory metal core first side; depositing additional powder bed material over said second refractory metal core second side and exterior surfaces; and fusing said powder bed material and said additional powder bed material; wherein the method further comprises: pre-assembling said first refractory metal core with said second refractory metal core prior to fusing said powder bed material; forming a powder bed outer layer coating over said pre-assembled first refractory metal core and said second refractory metal core; and dipping said pre-assembled first refractory metal core and said second refractory metal core into a fluidized powder bed. pre-assembling said first refractory metal core with said second refractory metal core prior to fusing said powder bed material; forming a powder bed outer layer coating over said pre-assembled first refractory metal core and said second refractory metal core; and dipping said pre-assembled first refractory metal core and said second refractory metal core into a fluidized powder bed.