Synthesis of MoSi sub 2 /SiC composite in situ using a solid state displacement reaction between Mo sub 2 C and Si

摘要: Solid state displacement reactions are being evaluated as a technique to produce intermetallic/ceramic matrix composites in situ. diffusional phase transformations whereby two or more elements compounds react form new product that thermodynamically stable than the starting reactants. Interwoven dispersed microstructures, important for composite strength and toughness, can be achieved using microstructures unattainable by other means. This amounts growing reinforcement phases situ, which is becoming an increasingly concept synthesis. Control of morphology critical aspect these methods. Issues microstructural control cleanliness addressed ways cannot treated with techniques. In this paper, authors pursued phenomenological approach. Reactant materials were combined means diffusion couples order efficiently screen number promising reactions. Materials selected based on their potential useful thermodynamic considerations. There high level interest MoSi{sub 2} calculations have shown 2}/SiC pair. It was logical step tomore » Mo{sub 2}C Si SiC.« less