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Algenaid, Wael
Publications (2 of 2) Show all publications
Aranke, O., Algenaid, W., Awe, S. & Joshi, S. V. (2019). Coatings for automotive gray cast iron brake discs: A review. Coatings, 9(9), Article ID 552.
Open this publication in new window or tab >>Coatings for automotive gray cast iron brake discs: A review
2019 (English)In: Coatings, ISSN 2079-6412, Vol. 9, no 9, article id 552Article in journal (Refereed) Published
Abstract [en]

Gray cast iron (GCI) is a popular automotive brake disc material by virtue of its high melting point as well as excellent heat storage and damping capability. GCI is also attractive because of its good castability and machinability, combined with its cost-effectiveness. Although several lightweight alloys have been explored as alternatives in an attempt to achieve weight reduction, their widespread use has been limited by low melting point and high inherent costs. Therefore, GCI is still the preferred material for brake discs due to its robust performance. However, poor corrosion resistance and excessive wear of brake disc material during service continue to be areas of concern, with the latter leading to brake emissions in the form of dust and particulate matter that have adverse effects on human health. With the exhaust emission norms becoming increasingly stringent, it is important to address the problem of brake disc wear without compromising the braking performance of the material. Surface treatment of GCI brake discs in the form of a suitable coating represents a promising solution to this problem. This paper reviews the different coating technologies and materials that have been traditionally used and examines the prospects of some emergent thermal spray technologies, along with the industrial implications of adopting them for brake disc applications. © 2019 by the authors.

National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear) Vehicle Engineering
Research subject
ENGINEERING, Manufacturing and materials engineering
urn:nbn:se:hv:diva-14488 (URN)10.3390/coatings9090552 (DOI)000487973600064 ()2-s2.0-85072179966 (Scopus ID)
Swedish Energy Agency, 46393-1
Available from: 2019-10-01 Created: 2019-10-01 Last updated: 2020-01-30
Algenaid, W., Ganvir, A., Calinas, R. F., Varghese, J., Rajulapati, K. V. & Joshi, S. V. (2019). Influence of microstructure on the erosion behaviour of suspension plasma sprayed thermal barrier coatings. Surface & Coatings Technology, 375, 86-99
Open this publication in new window or tab >>Influence of microstructure on the erosion behaviour of suspension plasma sprayed thermal barrier coatings
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2019 (English)In: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 375, p. 86-99Article in journal (Refereed) Published
Abstract [en]

Thermal barrier coatings (TBCs) are applied on the surface of hot parts of gas turbine engines to increase the turbine efficiency by providing thermal insulation and to protect the engine parts from the harsh environment. Typical degradation of TBCs can be attributed to bond coat oxidation, thermal stress etc. In addition to this, erosion can also lead to partial or complete removal of the TBCs especially when the engine operates under erosive environment such as flying over desert area, near active volcanic or offshore ocean environment. Suspension Plasma Spraying (SPS) is a promising technique for TBC applications by virtue of its ability to produce a strain-tolerant porous-columnar microstructure that combines the benefits of both electron beam physical vapor deposited (EB-PVD) as well as atmospheric plasma sprayed (APS) coatings. This work investigates the influence of various coating microstructures produced by SPS on their erosion behavior. Six different coatings with varied microstructures produced using different suspensions with distinct characteristics were studied and their erosion resistance was compared. Results showed significant influence of SPS TBCs microstructures on the erosion resistance. Furthermore, the erosion resistance of SPS TBCs showed a close correlation between fracture toughness and the erosion rate, higher fracture toughness favours superior erosion resistance. © 2019 Elsevier B.V.

Engines; Erosion; Fracture toughness; Microstructure; Offshore oil well production; Plasma jets; Porosity; Silicon compounds; Sprayed coatings; Thermal barrier coatings; Thermal insulation, Atmospheric plasmas; Coating microstructures; Columnar microstructures; Physical vapor deposited; Plasma-sprayed thermal barrier coating; Suspension plasma spraying; Thermal barrier coating (TBCs); Turbine efficiency, Plasma spraying
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering; Production Technology
urn:nbn:se:hv:diva-14462 (URN)10.1016/j.surfcoat.2019.06.075 (DOI)000488409900010 ()2-s2.0-85068658494 (Scopus ID)
Available from: 2019-10-01 Created: 2019-10-01 Last updated: 2020-01-30Bibliographically approved

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