Reaction kinetics between fiber and matrixInterdiffusion and interdiffusion controlled intermediate phase formation in metal matrix composites can be of interest for the prolonged application of these systems at high temperatures. Methods are discussed that address the kinetics of interdiffusion in systems that exhibit solid solution intermixing or the formation of a third intermediate phase at the fiber/matrix interface, or both. The tungsten fiber reinforced niobium and tungsten fiber reinforced superalloy systems are employed as model systems for experimentation and discussion. In an effort to impede interdiffusion, the concept of ion implanted diffusion barriers have been examined. Preliminary results on the feasibility and effectiveness of ion implanted diffusion barriers are presented.
Document ID
19890049049
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kopp, M. W. (Columbia Univ. New York, NY, United States)
Tien, J. K. (Columbia University New York, United States)
Petrasek, D. W. (NASA Lewis Research Center Cleveland, OH, United States)