Mechanical interrogation of interfaces in monofilament model composites of continuous SiC fiber-aluminum matrix

摘要: Abstract The interfacial region between continuous SiC fiber and aluminum alloy matrix, in monofilament metal matrix composites (MMC), has been characterized. study utilized two fibers, produced by Textron (SCS-2) Sigma (Σ) alloys: A11100 A16061. Characterization methods employed included: optical electron microscopy (i.e. SEM EPMA), mechanical testing of as-received heat treated single samples monitoring acoustic emission (AE) during tensile tests. In addition, shear strength (ISS) was experimentally determined t wo different techniques, indentation fragmentation. Indentation tests were carried out the temperature range 0–320°C. Results indicate that load is transferred from to fiber, primarily frictional stresses. friction loading composite stems residual compressive thermal stresses, which result differential consolidation temperatures, difference expansion coefficients matrix. Consolidation had no effect on reaction zones formed. Exposure for 7000 h at 6000δC significant ISS. Fiber fractures accompanied intense AE. breaks a small piece adjacent larger fragments, gave rise characteristic AE with distinct waveforms fibers (Σ SCS-2).