Due to recent interest in zirconium carbides as an ingredient in solid propellants, a variety of tests was run on available ZrC particles. This investigation included controlled heating and combustion tests. The results appear to show that ZrC particles burn in a complex way with solid or liquid accumulating on the surface a gaseous oxide leaving the surface and possibly a reaction between the accumulating oxide and the original ZrC. Test results indicate that ZrC does not concentrate on the burning surface or change the surface details. It ignites as it leaves the surface, burns fast enough to be fully consumed in the motor fine particles, and the particles change size only slightly during burning. The results suggest that stabilization of combustion is produced by particle damping.