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We systematically study the relationship between equilibrium andnon-equilibrium phase diagrams of a system of short-ranged attractive colloids.Using Monte Carlo and Brownian dynamics simulations we find a window ofenhanced crystallization that is limited at high interaction strength by aslowing down of the dynamics and at low interaction strength by the highnucleation barrier. We find that the crystallization is enhanced by themetastable gas-liquid binodal by means of a two-stage crystallization process.First, the formation of a dense liquid is observed and second the crystalnucleates within the dense fluid. In addition, we find at low colloid packingfractions a fluid of clusters, and at higher colloid packing fractions apercolating network due to an arrested gas-liquid phase separation that weidentify with gelation. We find that this arrest is due to crystallization atlow interaction energy and it is caused by a slowing down of the dynamics athigh interaction strength. Likewise, we observe that the clusters which areformed at low colloid packing fractions are crystalline at low interactionenergy, but glassy at high interaction energy. The clusters coalesce uponencounter.

Crystallization and gelation in colloidal systems with short-ranged attractive interactions