Tribological Coatings Prepared by Cold Spray

Chromik, Richard R.; Alidokht, Sima A.; Shockley, J. Michael; Zhang, Yinyin

doi:10.1007/978-3-319-67183-3_11

Cited by 16 publications

(9 citation statements)

References 84 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This transition from mild wear to severe wear regimes with increasing normal load was commonly observed in SLMMCs [11]. Since impregnation of hard phases such as ceramics to fabricate metal matrix composites or hybrid SLMMCs effectively improves mechanical property of the matrix materials [12,13], in the present work, a Cu-MoS2-WC composite was produced and examined under gross slip regime using a normal load of 150 N. The fretting wear behaviour was compared to a Cu-MoS2 composite to explore the role of WC particles on third body behaviour and wear resistance.…”

Section: Introductionmentioning

confidence: 80%

Influence of WC on third body behaviour during fretting of cold-sprayed Cu MoS2WC composites

Zhang

Descartes

Chromik

2019

Tribology International

Self Cite

View full text Add to dashboard Cite

Fretting wear behaviour of cold-sprayed Cu-MoS2 and Cu-MoS2-WC composites rubbing against AISI 440C steel was studied under gross slip regime. Third body rheology during running-in and steady state was expressed using tribological circuit according to morphology observations on wear scars and transfer materials on the counterfaces. The velocity accommodation mechanisms (VAMs) were therefore identified. Presence of WC particles boosted generation and ejection of large wear particles during running-in and early steady state, yet promoted more stable and lower third body formation and ejection flows over the subsequent test, which led to considerably improved wear resistance. During steady state, the 12 wt.% of WC particles were able to prevent rapid detachment of tribologically transformed structure (TTS) layer and transfer film that was induced by MoS2. This was believed to be attributed from microwedging and pinning of the WC fragments.

show abstract

Section: Introductionmentioning

confidence: 80%

Influence of WC on third body behaviour during fretting of cold-sprayed Cu MoS2WC composites

Zhang

Descartes

Chromik

2019

Tribology International

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, recent research has also shown that the hard particles modify local stress states or accelerate the formation of wear-resistant tribofilms [5,9,21,22]. These tribofilms are often formed by oxidative wear of the matrix material but can also incorporate some of the hard particles.…”

Section: Discussionmentioning

confidence: 99%

“…During wear, metal matrix composite (MMC) coatings form tribolayers that are often beneficial and improve tribological properties in comparison to a pure metal coating of the same material as the matrix [1][2][3][4][5][6]. Tribolayers form due to the agglomeration of third bodies that are generated from one or both of the mating surfaces (first bodies) during wear [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

High temperature friction and wear behavior of cold-sprayed Ti6Al4V and Ti6Al4V-TiC composite coatings

Munagala

Torgerson

Scharf

et al. 2019

Wear

Self Cite

View full text Add to dashboard Cite

The poor wear resistance of titanium and its alloys often results in galling and high wear rates. One method to improve their wear resistance is by hard secondary phase reinforcement to create a metal matrix composite, which can be utilized in the bulk or as a coating. In the present study, Ti6Al4V coatings and Ti6Al4V-TiC metal matrix composite coatings were deposited on mild steel substrates using cold spray process and their dry sliding wear behaviour was studied over a static temperature range of 25-575 º C. Tests were performed using a unidirectional ball-on-disc tribometer with WC-Co sphere as the counterface at a load of 2.5 N and sliding velocity of 2.1 cm.s -1 . Wear rate and coefficient of friction (CoF) decreased with an increase in temperature and composite coatings exhibited higher wear resistance at all temperatures. Below 200 º C, abrasive wear characterized by ploughing by wear debris resulted in high wear of Ti6Al4V coatings, whereas formation of tribolayers led to lower wear of composite coatings. At elevated temperatures (> 200 º C), oxide glaze layers formed on both coatings were composed of WO3, TiO2 and CoWO4. Electron channel contrast imaging of the wear track cross-sections showed no splat debonding, less extent of recrystallization and larger grain sizes (at 575 º C) in composite coatings compared to Ti6Al4V.

show abstract

“…The characteristics of oxides, such as strength, adhesion to the substrate, and capacity to be sintered and therefore form glaze layers, among others, are strongly influenced by the materials in contact as well as the sliding and surrounding conditions. Several researchers [ 186 , 187 ] correlated the friction coefficient to material hardness. For example, hard material sliding over hard surfaces has a high shear strength and consequently a high friction value.…”

Section: Role Of Surface (In Situ) Oxides and Interfacial Processes A...mentioning

confidence: 99%

Tribological Performance of High-Entropy Coatings (HECs): A Review

et al. 2022

Self Cite

View full text Add to dashboard Cite

Surface coatings that operate effectively at elevated temperatures provide compatibility with critical service conditions as well as improved tribological performance of the components. High-entropy coatings (HECs), including metallic, ceramics, and composites, have gained attention all over the world and developed rapidly over the past 18 years, due to their excellent mechanical and tribological properties. High-entropy alloys (HEAs) are defined as alloys containing five or more principal elements in equal or close to equal atomic percentage. Owing to the high configurational entropy compared to conventional alloys, HEAs are usually composed of a simple solid solution phase, such as the BCC and FCC phases, instead of complex, brittle intermetallic phases. Several researchers have investigated the mechanical, oxidation, corrosion and wear properties of high-entropy oxides, carbides, borides, and silicates using various coating and testing techniques. More recently, the friction and wear characteristics of high-entropy coatings (HECs) have gained interest within various industrial sectors, mainly due to their favourable mechanical and tribological properties at high temperatures. In this review article, the authors identified the research studies and developments in high-entropy coatings (HECs) fabricated on various substrate materials using different synthesis methods. In addition, the current understanding of the HECs characteristics is critically reviewed, including the fabrication routes of targets/feedstock, synthesis methods utilized in various research studies, microstructural and tribological behaviour from room temperature to high temperatures.

show abstract

Tribological Coatings Prepared by Cold Spray

Cited by 16 publications

References 84 publications

Influence of WC on third body behaviour during fretting of cold-sprayed Cu MoS2WC composites

Influence of WC on third body behaviour during fretting of cold-sprayed Cu MoS2WC composites

High temperature friction and wear behavior of cold-sprayed Ti6Al4V and Ti6Al4V-TiC composite coatings

Tribological Performance of High-Entropy Coatings (HECs): A Review

Contact Info

Product

Resources

About