Microstructural Characteristics and Mechanical Properties of Nanostructured and Conventional TiAlN and AlCrN Coatings on ASTM-SA210 Grade A-1 Boiler Steel

Source

Hindawi Publishing Corporation
ISRN Corrosion
Volume 2013, Article ID 231035, 14 pages
http://dx.doi.org/10.1155/2013/231035

Description

Nanostructured and conventional TiAlN and AlCrN coatings were deposited on ASTM-SA210 Grade A-1 boiler steel. The present work has been focused to characterize the conventional thick (by plasma spraying and gas nitrided) and nanostructured thin (by physical vapor deposition process) TiAlN and AlCrN coatings developed on ASTM-SA210 Grade A-1 boiler steel. The surface morphology of the coated samples was studied using FE-SEM with EDAX attachment, XRD analysis, AFM analysis, and the Xray mapping analysis.The presence of metal nitride phases as identified by XRD analysis indicates that the desired coatings were successfully developed.The bond strength, surface roughness, and microhardness of the gas nitrided plasma sprayed conventional coatings were measured. A good adhesion of the conventional thick TiAlN and AlCrN coatings was evident frombond test results.

Highlight

The nanostructured thin TiAlN and AlCrN coatings (by physical vapour deposition process at Oerlikon Balzers Ltd. Gurgaon, India) and conventional thick TiAlN and AlCrN coatings (by plasma spraying process at Anod Plasma Ltd. Kanpur, India; followed by gas nitriding process) were successfully deposited on ASTM-SA210 Grade A-1 boiler steel. The coatings were characterized for their microstructural features and hardness in present work. The following observations were made based on the present study.

 

Full article is available here. Sourced by Ir. Dr. Azmin Ahmad