Development and testing of multilayer physically vapour deposited coatings for piston rings

Lyubimov, V.V.; Voevodin, A. A.; Yerokhin, Aleksey; Timofeev, Y.S.; Arkhipov, I. K.

doi:10.1016/0257-8972(92)90040-h

Cited by 21 publications

(6 citation statements)

References 8 publications

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“…This combination of hardness and ductility necessary to produce a tough material is, of course, a classical challenge in the field of materials science, although nanocomposite coatings provide a promising answer to this challenge, with high hardness and a large relative volume of grain boundaries between crystalline and amorphous phases to deflect, split, and terminate growing cracks (114). To further improve ductility at the expense of superhardness, multilayer (115,116) and graded (117,118) composites can be produced. Alternatively, a more attractive option is the selection of a matrix phase with a lower elastic modulus in a homogeneous composite.…”

Section: Nanocomposite Thin Filmsmentioning

confidence: 99%

Chameleon Coatings: Adaptive Surfaces to Reduce Friction and Wear in Extreme Environments

Muratore

Voevodin

2009

Annu. Rev. Mater. Res.

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188

104

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Adaptive nanocomposite coating materials that automatically and reversibly adjust their surface composition and morphology via multiple mechanisms are a promising development for the reduction of friction and wear over broad ranges of ambient conditions encountered in aerospace applications, such as cycling of temperature and atmospheric composition. Materials selection for these composites is based on extensive study of interactions occurring between solid lubricants and their surroundings, especially with novel in situ surface characterization techniques used to identify adaptive behavior on size scales ranging from 10 −10 to 10 −4 m. Recent insights on operative solid-lubricant mechanisms and their dependency upon the ambient environment are reviewed as a basis for a discussion of the state of the art in solid-lubricant materials. 297 Click here for quick links to Annual Reviews content online, including: • Other articles in this volume • Top cited articles • Top downloaded articles • Our comprehensive search Further ANNUAL REVIEWS Tribology: the study of surfaces in relative motion, from the Greek word tribos, meaning rubbing Friction coefficient: the ratio of tangential force to applied normal force, or the ratio of shear strength to pressure if both forces are divided by contact area Abrasive wear: the plowing away of softer material by harder particles at contact interfaces Adhesive wear: asperities from both surfaces in contact adhere, and material from the softer surface is sheared away as the counterface moves Fatigue wear: the removal of material due to crack growth and propagation over repeated load cycles Wear rate: the rate of material loss from a surface due to sliding contact, often reported in units of volume lost per unit sliding distance per unit of applied normal force (e.g., mm 3 m −1 N −1) FUNDAMENTALS OF SOLID LUBRICATION IN DIVERSE ENVIRONMENTS A spray of liquid lubricant from a can available at the hardware store solves most familiar friction and wear problems on Earth under ordinary conditions of ambient pressure, humidity, and temperature. When any one of those operating parameters reaches the limits of advanced engineering materials, however, the availability of suitable lubricants is diminished significantly. Moreover, if operation throughout a broad range of any one of these environmental factors is desired, the number of choices becomes exactly zero; tribologists have found that no single surface can lubricate effectively outside a narrow span of ambient humidity or temperature (1-3). In fact, one of the primary technological barriers for the development of new jet engines for sustained highmach-number (>5) flights and other key aerospace advances is the ability to lubricate mechanical assemblies from ambient temperature to >1000 • C. Only recently have discoveries of self-adaptive mechanisms and subsequent developments in tribological coatings, made possible with modern instrumentation and pioneering efforts to observe phenomena at atomic through microscopic size scales at contact ...

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Section: Nanocomposite Thin Filmsmentioning

confidence: 99%

Chameleon Coatings: Adaptive Surfaces to Reduce Friction and Wear in Extreme Environments

Muratore

Voevodin

2009

Annu. Rev. Mater. Res.

Self Cite

188

104

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“…This system can be repeated many times until a coating of the required thickness is achieved. For example, Lyubimov et al [11] developed and tested two multi layer titanium-titanium nitride coatings for use on piston rings. The first coating system utilised four layers.…”

Section: Iic2 Thin Film Tribologymentioning

confidence: 99%

The Selection and Testing of Compression Seal and Chamber Coating Materials for the Pivotal™ Engine

Miller

Kral

2005

World Tribology Congress III, Volume 1

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The Pivotal™ Engine was conceived by Pivotal Engineering LTD to overcome some of the inherent problems associated with a conventional two-cycle engine, such as high wear rates and friction losses due to piston tilt and large port openings, reliability problems due to lack of control over piston temperatures and high oil consumption. The Pivotal engine is an Otto cycle two-stroke engine. The engine is assembled from 500cc modules utilizing a rectangular piston that pivots on a plain bearing at one end. The pivoting motion of the piston allows coolant to enter the piston through the centre of the pivot giving temperature control of the combustion chamber while restraining the piston so it has little or no contact with the chamber walls. Although friction loss, temperature control and oil consumption problems have thus been mitigated, prototype engines still experienced problems with high compression seal wear rates. Compression seals run in a reciprocating motion along a flat chamber wall, somewhat analogous to piston rings in a conventional engine, although velocity varies along the seal length. The goal of this research is therefore to select and test compression seals materials to obtain an adequate working life in the Pivotal engine. Based on the rotational tribometer results, the most promising chamber coating so far is plasma sprayed iron with molybdenum and the most promising seal material is reaction bonded silicon nitride.

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“…As a result of the literature review, it was observed that the research on piston rings coating with the PVD method is limited. The researchers observed that the Ti/TiN coating wore 30% less than the cast iron ring (Lyubimov et al, 1992). In another study, TiN, TiAlN and DLC coatings were applied to cast iron rings and their tribological properties were investigated.…”

Section: Introductionmentioning

confidence: 99%

TiAlCN Kaplı Piston Segmanının Tribolojik Özelliklerinin İncelenmesi

Alisir

EVRENSEL

2022

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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In internal combustion engines (ICE), the friction of parts working in contact affects both engine life and fuel consumption. Piston rings cause a significant portion of friction losses in an ICE. The most effective method to reduce these losses is the surface coating process. The PVD technique draws attention both because it does not pose a problem for the environment and because it enables the coating of complex geometric parts. In this article, the tribological and mechanical properties (microhardness) of TiAlCN ceramic coating and uncoated piston ring coated on the surface of the cast iron piston ring by the cathodic arc PVD technique were investigated. The structural properties of the coated and uncoated samples were investigated by SEM, EDX and the coatings must have XRD methods. As a result of the tribological test, the average friction coefficients of the uncoated and TiAlCN coating under dry conditions were determined as 0.76 and 0.21, respectively. As a result of the reciprocating slip test, the wear rate of the TiAlCN coating was reduced by approximately 97% compared to the uncoated ring. The results showed that the TiAlCN coating exhibited good tribological properties. Besides, wear mechanisms were examined based on the SEM image and EDX analysis taken from the worn surface of the samples.

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Development and testing of multilayer physically vapour deposited coatings for piston rings

Cited by 21 publications

References 8 publications

Chameleon Coatings: Adaptive Surfaces to Reduce Friction and Wear in Extreme Environments

Chameleon Coatings: Adaptive Surfaces to Reduce Friction and Wear in Extreme Environments

The Selection and Testing of Compression Seal and Chamber Coating Materials for the Pivotal™ Engine

TiAlCN Kaplı Piston Segmanının Tribolojik Özelliklerinin İncelenmesi

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