Thermal Spraying, Optimization And Characterization Of Abradable Seal Coating For Gas Turbine For Service Temperature Up To 750° C

M. Shadab Siddiqui*, Pankaj Joshi, N. Nayak, K. Vidyasagar

Surface Coatings and Treatment (SCT), BHEL R&D, Hyderabad 500093, India

Adv. Mater. Lett., 2014, 5 (9), pp 506-510

DOI: 10.5185/amlett.2014.588

Publication Date (Web): Sep 07, 2014

E-mail: siddiqui@bhel.in

Abstract


In thermal power plants, significant improvements in overall efficiencies can be achieved by reducing the leakage flows in compressor and turbine sections. One way to minimize these leakages is by the use of thermally sprayed abradable sealing coatings. This paper discusses the development of abradable coating for gas turbine shroud segments for service temperatures up to 750 ºC. The abradable coating is developed using plasma coating technique. Effects of coating properties on changing the coating parameters are also discussed. Porosity, bond strength, micro hardness, erosion and abradability tests were performed over the plasma coated samples. Porosity, bond strength, micro hardness and erosion tests results were coming within the bracket suggested by the previous researchers; however abradability tests were not upto the mark. An in house abradability test rig was developed and abradable testing at room temperature was performed using this rig. The results obtained with the abradable test rig were not upto the mark and more testing and analysis is currently being performed to achieve more satisfactory results with the test rig.

Keywords

Abradable coatings, erosion number, abradability, gas turbine

Current Issue

Celebrating 10th Years of Diamond Open Access Publishing in Advanced Materials  


Cerebral Oxygenation Studies Through Near Infrared Spectroscopy: A Review


Analysis of Fine Sulfoaluminate Cement by Strength and Thermogravimetric Analysis


Characterization of the Interfacial Surface Energy for Composite Electrical Conduction Measurements using Two Full Range Percolation Threshold Models


Quantitative Detect of Fatigue of Membrane of Erythrocyte in Uniform Shear Field


Ecofriendly-developed Polyacrylic Acid-coated Magnetic Nanoparticles as Catalysts in Photo-fenton Processes


Evaluation of Drug Interactions with Medications Prescribed to Ambulatory Patients with Metabolic Syndrome in Urban Area


Fiber-reinforced Cementitious Composite: Sensitivity Analysis and Parameter Identification 


Evaluation of Drug Utilization Patterns Based on World Health Organization Drug use Indicators at Outpatients Clinics


Are Quantitatively Micro-machined Scaffolds Effective for Cell Technology?


Synthesis and Characterization of Gold Nanoparticles from Lobelia Nicotianifolia Leaf Extract and its Biological Activities


Advanced Oxidations of Tartrazine Azo-dye


Antifungal Activity of Salvia jordanii Against the Oral Thrush Caused by the Cosmopolitan Yeast Candida albicans among Elderly Diabetic Type 2 patients


Previous issues

Advanced Materials Congress Celebrating 10th Years of Establishment

Secure Management of Networked Batteries for Building Integrated Photovoltaics (BIPV) Systems  

The Cause of 100-year Low Carbonated Concrete of the Bridge 

Organic Montmorillonite Intercalated Nano-composites Prevent Post-Surgical Associated Infections

Morphology/tensile Performance Relationship for LLDPE/PP Double Gated Injected Blends

Preparation and Characterization of Nickel Ferrite Nanoparticles via Sol-gel Method

Nitrogen-doped Diamond Nanowire Gas Sensor for the Detection of Methane

Manufacture of Functional Open-cell Al Foams with Recycled Al Scraps using NaCl Ball Space Holder 

Vilsmeier-Haack Transformations under Non Classical Conditions

New Application of Highly Vesicular Basalt from Jabel Isbil Volcano (Dhamar-Rada'a Volcanic Field), Yemen

An Assessment of Tribological Characteristics under different Operating Condition

Functional Bi Coatings as A Perspective Material for Radiation Shields Production against Electron Radiation

Effects of Silica Modified NiFe2O4 on the Dielectric and Electrical Properties of NiFe2O4 filled Poly (methyl methacrylate) Composites

Upcoming Congress

Knowledge Experience at Sea TM