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Abstract
Relative to most other materials, silicon nitride is very erosion resistant. However, the resulting surface flaws degrade strength–-a serious concern for component designers. An in situ reinforced silicon nitride, GS-44, was eroded in a slinger apparatus. Both transient (extremely low level) and steady-state erosion regimes were investigated. Alumina particles with effective average diameters of 140 μm and 63 μm were used at velocities of 50, 100, and 138 m/s. The biaxial tensile strength of the eroded specimens was measured. The strength decreased by about 15 percent after a very small erodent dosage and then remained virtually constant with further erosion.
Presented at the 50th Annual Meeting in Chicago, Illinois May 14–19, 1995
Notes
Presented at the 50th Annual Meeting in Chicago, Illinois May 14–19, 1995