Reaction zone microstructure in a Ti3Al + Nb/SiC composite

作者: S. F. Baumann , P. K. Brindley , S. D. Smith

DOI: 10.1007/BF02672571

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摘要: A composite of Ti-25Al-13Nb (atomic percent) matrix with a continuous SiC fiber (SCS-6) reinforcement was fabricated by hot pressing powder cloths and mats fiber. The fiber/matrix reaction zone studied using scanning electron microscopy (SEM) transmission microscopy/analytical (TEM/AEM) techniques. extent determined, phases were identified, solute partitioning among the determined. It found that had reacted only portion carbon-rich outer layer SCS-6 contained two concentric zones which are distinguished presence different carbide phases. Both hexagonal Si-bearing phase, one also some fine scattered porosity. results discussed reference to available phase equilibria data.

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