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Coatings for automotive gray cast iron brake discs: A review
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing.
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing.
R and D Department, Automotive Components Floby AB, Floby, 52151, Sweden.
University West, Department of Engineering Science, Research Enviroment Production Technology West. (PTW)ORCID iD: 0000-0001-5521-6894
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.

Place, publisher, year, edition, pages
2019. Vol. 9, no 9, article id 552
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear) Vehicle Engineering
Identifiers
URN: urn:nbn:se:hv:diva-14488DOI: 10.3390/coatings9090552ISI: 000487973600064Scopus ID: 2-s2.0-85072179966OAI: oai:DiVA.org:hv-14488DiVA, id: diva2:1356373
Funder
Swedish Energy Agency, 46393-1Available from: 2019-10-01 Created: 2019-10-01 Last updated: 2019-10-15

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