Isothermal sections in the Cr-Ga-N system in the 650-1000 degrees C temperature range

Isothermal sections at 670, 740, and 800 degrees C in the Cr-Ga-N ternary s ystem were investigated. Details of the Cr-Ga and Cr-N binary phase diagram s were confirmed, and the equilibrium diagrams were constructed. At all tem peratures, Cr3GaN was in equilibrium with all the condensed phases, except GaN. In the 670-800 degrees C temperature range, Cr2GaN appears to be kinet ically stable in contact with GaN. This led to the construction of behavior diagrams that are valid only as long as GaN is present in the initial mixt ure. Above similar to 910 degrees C, Cr2GaN decomposes to form Cr3GaN, CrN, and Ga(1). At 1000 degrees C, Cr3GaN is in equilibrium with all the conden sed phases, and CrN is in equilibrium with Ga.