The Effect of Ni Interlayers on Compaction of Mo/Mo Silicide Composites

Reactions during compaction of Mo/Mo suicide wires with Ni interlayers are qualitatively assessed in this work. It appeared that due to extreme high temperature strength of MoSi2 hot pressing even at 1800 degrees C/60 min/30 MPa in vacuum had not been sufficient to compact the Mo/Mo suicide wires in the absence of any additional interfacial layer. Therefore Ni had been chemically coated on the surface of Mo/Mo suicide wires that were subsequently compacted by hot pressing. Structural analysis revealed the reaction between Ni and MoSi2 resulting in the formation of ternary (MoNiSi) compounds. These established an interfacial bonding with minimal porosity.