Novel chemical process for preparing h-BN solid lubricant coatings on titanium-based substrates for high temperature tribological applications

Yuan, Sheng; Toury, Bérangère; Benayoun, Stéphane

doi:10.1016/j.surfcoat.2015.03.040

Cited by 19 publications

(13 citation statements)

References 24 publications

(25 reference statements)

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“…Observations made by SEM and proposed on a previous paper [31] show recovering and almost homogenous coatings presenting, moreover, more and more visible defects due to the original presence of the powder.…”

Section: Thick H-bn Synthesismentioning

confidence: 59%

“…From this important result we decided to combine the use of an additivated polymer to a RTA thermal annealing to get crystallized h-BN coating over titanium substrate while preserving the latter integrity and saving time [31].…”

Section: Thick H-bn Synthesismentioning

confidence: 99%

“…To the best of our knowledge this is the best compromise between the crystallization rate and the substrate preservation. Futher studies [31] have shown that coatings prepared with an additivated precursor and treated under RTA present very interesting mechanical and adhesion properties for tribological applications.…”

Section: Thick H-bn Synthesismentioning

confidence: 99%

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How to Increase the h-BN Crystallinity of Microfilms and Self-Standing Nanosheets: A Review of the Different Strategies Using the PDCs Route

et al. 2016

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Hexagonal boron nitride (h-BN) is a well-known material whose use is almost restricted to lubricating applications in domains ranging from metallurgy to cosmetics. Howover, h-BN displays many other interesting properties, opening new perspectives for other engineering applications, such as as a solid lubricant in aeronautics, as the perfect substrate to graphene for electronic devices, etc. However, all these promising developments require tailored h-BN shapes displaying a high level of crystallization, ensuring its properties for the long term. Here, we developed three strategies, all associated with the Polymer Derived Ceramics (PDCs) route, to prepare highly crystallized supported thick coatings and self-standing nanosheets. The first strategy concerns the innovative implementation of a Rapid Thermal Annealing to prepare micrometric h-BN coatings on thermal sensitive substrates. Compared to conventional treatment the crystallization of h-BN has successfully lowered to about 300˝C. The second strategy consists of an additivation of the used polymer precursor. Effect of lithium nitride as a crystallization promoter was investigated lowering the onset crystallization temperature from 1400˝C (traditionally) to 1000˝C. This novel synthetic route allows preparing self-standing highly crystallized h-BN nanolayers. Finally, the third strategy is based on a unique combination of the PDCs route with Spark Plasma Sintering to profit of both approaches. This original method leads to large and well-crystallized flakes available for a subsequent exfoliation.

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Section: Thick H-bn Synthesismentioning

confidence: 59%

Section: Thick H-bn Synthesismentioning

confidence: 99%

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How to Increase the h-BN Crystallinity of Microfilms and Self-Standing Nanosheets: A Review of the Different Strategies Using the PDCs Route

et al. 2016

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“…Yuan et al. 24 deposited well-crystallized hBN coatings on Ti-based substrates, and carried out tests on a reciprocating cylinder-disk tribosystem. The results showed that the COF decreased from 0.72 (bare substrate) to 0.35 at 360 ℃.…”

Section: Introductionmentioning

confidence: 99%

“…In most of those cases, hBN nanoparticles as additive reduced the wear loss by 30-70% at various loads and showed excellent tribological performance. Yuan et al 24 deposited well-crystallized hBN coatings on Ti-based substrates, and carried out tests on a reciprocating cylinder-disk tribosystem. The results showed that the COF decreased from 0.72 (bare substrate) to 0.35 at 360 C. Tyagi et al 25 investigated the friction and wear characteristics of Ni-based powder metallurgy composites against AISI 52100 steel at temperatures of 25 C, 400 C, and 600 C. The wear rates of the hBN-containing composites were approximately an order of magnitude lower than those of the base alloy (having no solid lubricant) at all the temperatures.…”

Section: Introductionmentioning

confidence: 99%

Investigation of hBN powder lubricating characteristics of die steel H13–ceramic Si₃N₄ tribopair at 800 ℃

Zhang

Wang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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In the background that hot-working die steels have been widely used in the hot stamping process of high strength steels for manufacturing car bodies and parts, solid lubricant materials are promising for decreasing the friction and wear on die surfaces at high temperatures. In this work, hexagonal boron nitride was used to lubricate the sliding interface of ceramic Si3N4 against die steel H13 at 800 ℃, and its frictional behavior was investigated at different contact pressures and rotating speeds by pin-on-disk testing. Tribological characteristics of hexagonal boron nitride solid lubricant were analyzed through 3D laser scanning confocal microscope and energy-dispersive spectroscopy. The results show that the wear behavior of hexagonal boron nitride powder lubricating film featured two stages: gradual undermining and complete damage. The formation-broken dynamic cycle of partial lubricating film constantly occurred at the frictional interface until the film was completely destroyed. In a short period, the hexagonal boron nitride lubricant can reduce the friction coefficient efficiently compared with dry friction, and the die substrate showed basically no abrasion because a layer of plasticity accumulated on the die surface, which protected the substrate. In a certain range, the boundary-lubricating film became damaged rapidly with increasing load, and high speed was not conducive to the stability of the lubricating film.

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A Review on the Tribological Performances of High‐Entropy Alloys

Chen

Zhu

2022

Adv Eng Mater

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Wear is an important form of material loss and failure, and it is usually inevitable in almost all mechanical systems with moving parts. The durability and reliability of engineering components are closely related to their wear resistance. Developing advanced materials to alleviate energy and materials losses in moving mechanical systems still remains a great challenge nowadays. The emergence of novel high‐entropy alloys (HEAs) that compose of multiple principal elements holds great promise for the development of materials with extraordinary wear resistance, due to their high hardness, high wear resistance, and excellent corrosion resistance. Herein, the current research progress of the tribology of HEAs under different conditions is reviewed, including high temperature, dry condition, corrosion solution, and oil lubrication. Specifically, the effects of compositions, microstructures, lubricants, and protective oxide layers on the tribological performance of HEAs are summarized. Furthermore, the underlying mechanisms that are responsible for the excellent wear resistance of HEAs under different conditions are discussed. Finally, the current challenges and the future outlooks are emphasized and addressed systematically. In view of the excellent tribological performances and the diversity of compositional design, HEAs have great potential to be applied in a wide range of mechanical systems to minimize wear.

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Novel chemical process for preparing h-BN solid lubricant coatings on titanium-based substrates for high temperature tribological applications

Cited by 19 publications

References 24 publications

How to Increase the h-BN Crystallinity of Microfilms and Self-Standing Nanosheets: A Review of the Different Strategies Using the PDCs Route

How to Increase the h-BN Crystallinity of Microfilms and Self-Standing Nanosheets: A Review of the Different Strategies Using the PDCs Route

Investigation of hBN powder lubricating characteristics of die steel H13–ceramic Si₃N₄ tribopair at 800 ℃

A Review on the Tribological Performances of High‐Entropy Alloys

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Novel chemical process for preparing h-BN solid lubricant coatings on titanium-based substrates for high temperature tribological applications

Cited by 19 publications

References 24 publications

How to Increase the h-BN Crystallinity of Microfilms and Self-Standing Nanosheets: A Review of the Different Strategies Using the PDCs Route

How to Increase the h-BN Crystallinity of Microfilms and Self-Standing Nanosheets: A Review of the Different Strategies Using the PDCs Route

Investigation of hBN powder lubricating characteristics of die steel H13–ceramic Si3N4 tribopair at 800 ℃

A Review on the Tribological Performances of High‐Entropy Alloys

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Investigation of hBN powder lubricating characteristics of die steel H13–ceramic Si₃N₄ tribopair at 800 ℃