Systematic approach to improve the performance of PVD coatings for tool applications

Löffler, F.

doi:10.1016/0257-8972(94)90246-1

Cited by 47 publications

(15 citation statements)

References 9 publications

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“…For this system, when L > 0, the system cannot lose its stability. As proof of this result, according to equation (6), the coefficient L does not depend on parameter α,. This corresponds to the conclusion made by Gershman and Bushe [2] that the system cannot lose stability if only one process denoted by symbol i, is occurring.…”

Section: Theoretical Investigationmentioning

confidence: 79%

“…Figure 2, shows wear resistance data for the multilayered coatings compared to the mono-layered coating at speeds of 500 m/min [6]. The multilayered coating outperforms the mono-layered coating.…”

Section: Resultsmentioning

confidence: 99%

“…Dry ultra-high speed machining of hardened tool steels is a classical example of the extreme conditions. Under these conditions high temperatures and stresses [5] occur on the friction surface, followed by a number of simultaneously processes that result in complex frictional conditions [6]. In addition to intensive adhesion, rubbing, and tribochemical reactions on the contact surface due to interaction with the environment, there is also a high probability of thermal-fatigue for some operations [6,7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Self-Organization during Friction in Complex Surface Engineered Tribosystems

Fox-Rabinovich

Гершман

Yamamoto

et al. 2010

Entropy

170

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Section: Theoretical Investigationmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Self-Organization during Friction in Complex Surface Engineered Tribosystems

Fox-Rabinovich

Гершман

Yamamoto

et al. 2010

Entropy

170

View full text Add to dashboard Cite

show abstract

“…This leads to very complex frictional phenomena [14][15]. In addition to intensive rubbing, adhesion, abrasion and tribochemical reactions at these high temperatures, there is also thermal fatigue for some cutting applications [14]. From a tribological viewpoint, this is a catastrophic wear mode [6], which is close to the 'edge of chaos' [16] due to excessive wear rate of unprotected (uncoated) friction surfaces.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hierarchical adaptive nanostructured PVD coatings for extreme tribological applications: the quest for nonequilibrium states and emergent behavior

Fox-Rabinovich

Yamamoto

Beake

et al. 2012

Science and Technology of Advanced Materials

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Adaptive wear-resistant coatings produced by physical vapor deposition (PVD) are a relatively new generation of coatings which are attracting attention in the development of nanostructured materials for extreme tribological applications. An excellent example of such extreme operating conditions is high performance machining of hard-to-cut materials. The adaptive characteristics of such coatings develop fully during interaction with the severe environment. Modern adaptive coatings could be regarded as hierarchical surface-engineered nanostructural materials. They exhibit dynamic hierarchy on two major structural scales: (a) nanoscale surface layers of protective tribofilms generated during friction and (b) an underlying nano/microscaled layer. The tribofilms are responsible for some critical nanoscale effects that strongly impact the wear resistance of adaptive coatings. A new direction in nanomaterial research is discussed: compositional and microstructural optimization of the dynamically regenerating nanoscaled tribofilms on the surface of the adaptive coatings during friction. In this review we demonstrate the correlation between the microstructure, physical, chemical and micromechanical properties of hard coatings in their dynamic interaction (adaptation) with environment and the involvement of complex natural processes associated with self-organization during friction. Major physical, chemical and mechanical characteristics of the adaptive coating, which play a significant role in its operating properties, such as enhanced mass transfer, and the ability of the layer to provide dissipation and accumulation of frictional energy during operation are presented as well. Strategies for adaptive nanostructural coating Topical Review design that enhance beneficial natural processes are outlined. The coatings exhibit emergent behavior during operation when their improved features work as a whole. In this way, as higher-ordered systems, they achieve multifunctionality and high wear resistance under extreme tribological conditions.

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Hard yet Tough Nanocomposite Coatings – Present Status and Future Trends

Zhang

Wang

Ong

et al. 2007

Plasma Processes & Polymers

119

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Toughness and hardness are important aspects for coating applications in manufacturing industry. Extensive theoretical and experimental efforts have been made to synthesize and study nanocomposite coatings with super hardness and high toughness. The materials can be hardened through various or combined hardening mechanisms. However, for engineering applications, coating toughness is as important as, if not more than, super hardness. At present, there is neither a standard test procedure, nor a standalone methodology for the assessment of thin film toughness. The determination of the toughness is still a difficult task, and very much a fully open problem. In this article, we review the hardening and toughening mechanisms of nanocomposite films, and the toughness characterization techniques. Based on these reviews, an outlook will be presented in the concluding remarks.magnified image

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Systematic approach to improve the performance of PVD coatings for tool applications

Cited by 47 publications

References 9 publications

Self-Organization during Friction in Complex Surface Engineered Tribosystems

Self-Organization during Friction in Complex Surface Engineered Tribosystems

Hierarchical adaptive nanostructured PVD coatings for extreme tribological applications: the quest for nonequilibrium states and emergent behavior

Hard yet Tough Nanocomposite Coatings – Present Status and Future Trends

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