Grindability Evaluation and Fatigue and Wear Behavior of Conventional and Nanostructured Al_2O_3-13 Wt.% TiO_2 Air Plasma Sprayed Coatings

摘要

In this paper, air plasma spray Al_2O_3-13% TiO_2 coatings were produced by two type of feedstock powders (agglomerated nanostructured and conventional). Mechanical properties of coatings including hardness, toughness, fatigue, and wear behavior as well as grindability of coatings were evaluated and compared. We report that due to the presence of nanostructure zone in microstructure of air plasma sprayed Al_2O_3-13% TiO_2 nanostructure coatings, a significant gain is observed in toughness, grindability, and fatigue lifetime in nanostructure coating over its counterpart conventional coating.