In order to eliminate the stress concentration and cracking in conventional ceramic coatings and increase the bonding strength, NiAlAl_(2)O_(3) gradient ceramic coating was fabricated making use of plasma spraying. The composition, bonding strength, microhardness, and thermal shock resistance of the coating were investigated. Results showed that the gradient coating was characterized by macroscopically nonuniform but microscopically continuous composition distribution. The NiAl transition layer was bene...