  Primordial black holes are a popular candidate for dark matter. In the mass
regime where their conjectured Hawking evaporation is significant, they have
been subject to many constraints via X-rays, gamma-rays, and even radio
emission. Previously the Sunyaev-Zel'dovich effect has been considered to place
further limits on the M > 10M? primordial black hole abundance via the effects
of their accretion of ambient gas. In this work, we will present a novel and
robust means of placing abundance limits on low-mass black holes, using the
Sunyaev-Zel'dovich effect induced by electrons produced via their Hawking
radiation within galaxy clusters.
