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SEMs (A) FRC polished smoothly with extremely low wear surface 200X magnification scale bar 100 μm (B) Rough PFC Alert® with debonding microfiber wear surface debris 100X magnification scale bar 200 μm. (C) FRC 5000X magnification reveals how a quartz fiber wears thin into flat plate-like particulate producing the smooth surface in figure 2A, scale bar 5 μm.
