OXIDATION CHARACTERISTICS OF THERMAL-SPRAYED COBALT-BASED SUPERALLOY COATINGS: A REVIEW

S. Suresh Kumar, M. Raviprakash, C. Durga Prasad, R. N. Chikkangoudar, Shrishail B. Sollapur, Yugesh A. Kharche and Gautam Jalba Narwade
Additional contact information
S. Suresh Kumar: Department of Mechanical Engineering, RV Institute of Technology and Management, Bengaluru 560076, India†Visvesvaraya Technological University, Belagavi, Karnataka, India
M. Raviprakash: ��Department of Mechanical Engineering, The Oxford College of Engineering, Bengaluru, Karnataka, India
C. Durga Prasad: Department of Mechanical Engineering, RV Institute of Technology and Management, Bengaluru 560076, India†Visvesvaraya Technological University, Belagavi, Karnataka, India
R. N. Chikkangoudar: �Department of Mechanical Engineering, KLE Technological University. Dr. M S Sheshgiri Campus, Belagavi, Karnataka 590008, India
Shrishail B. Sollapur: �Department of IIAEM, Faculty of Engineering and Technology, JAIN (Deemed -to- be University), Bengaluru, Karnataka 560069, India
Yugesh A. Kharche: ��Department of Mechanical Engineering, Padmashri Dr. V. B. Kolte College of Engineering, Malkapur, Maharashtra, India
Gautam Jalba Narwade: *Dr. Vishwanath Karad MIT World Peace University, Pune, Maharashtra, India

Surface Review and Letters (SRL), 2024, vol. 31, issue 11, 1-12

Abstract: Superalloys go through cyclic oxidation which refers to the progression of reputed exposure of materials to alternating oxidizing and non-oxidizing environments at high temperatures. The oxidation behavior of cobalt-based superalloy coatings depends on several variables, including the environment, surface roughness, manufacturing conditions, & coating composition. Because of their higher temperatures and protective oxide layer, coatings with a greater cobalt concentration are more oxidation-resistant. The behavior of oxidation is influenced by surface roughness, where rough surfaces offer greater surface area to oxidation while smooth surfaces decrease interaction with the environment. The microstructure and porosity of the coating are further impacted by processing variables used in thermal spraying, including temperature, particles velocity, and spray distance. Adding reactive components to the coating composition, such as silicon and aluminum, and applying post-treatments like nitriding or sealing are two ways to increase oxidation resistance. A greater temperature and particle speed can lead to a denser with less porous covering, improving the oxidation process resistance. The two typically used heat spraying techniques are high-velocity oxy-fuel (HVOF) and plasma spraying. To increase the resistance to oxidation of thermal spray cobalt-based superalloy coating, some strategies have been devised, such as inclusion of reactive materials, such as aluminum and silicon, which is the coating composition. These elements may establish an oxide layer protecting the coating’s appearance, preventing further oxidation.

Keywords: Cobalt-based superalloy; thermal spray coatings; HVOF; oxidation (search for similar items in EconPapers)
Date: 2024
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X24300119
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:31:y:2024:i:11:n:s0218625x24300119

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X24300119

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().