화학공학소재연구정보센터
Applied Surface Science, Vol.321, 268-274, 2014
Evolution of the microstructure and oxidation resistance in co-sputtered Zr-Y-N coatings
This study investigates the influence of Y addition to the microstructure and oxidation resistance of ZrN coating. Zr-Y-N coatings with a 0-5.8 at.% Y addition were fabricated by reactive co-sputtering in an Ar-N-2 atmosphere. The results indicate that solid solution-type Zr-Y-N coatings show a columnar structure with a strong (1 1 1) preferred orientation. The grain size decreases from 76 to 21 nm with an increase in the amount of Y from 0 to 5.8 at.%. The oxidation results demonstrate that the most beneficial addition of Y to improve the oxidation resistance of ZrN coating is 1.0 at.%. An excessive addition of Y produces detrimental effects. Cracking in the oxide scale and oxygen inward diffusion through the scale have been identified as the primary reasons for the loss of oxidation resistance. (C) 2014 Elsevier B.V. All rights reserved.