Structural and mechanical property of Si incorporated (Ti,Cr,Al)N coatings deposited by arc ion plating process

Yamamoto, Kenji; Kujime, Susumu; Takahara, Kazuki

doi:10.1016/j.surfcoat.2005.08.025

Cited by 47 publications

(24 citation statements)

References 32 publications

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“…Preferential oxidation of Si is observed after the oxidation test and this Si-rich oxide film acts as a diffusion barrier for further oxidation [217], much like in case of the preferential oxidation of Al in the (Ti,Al)N coating [109,263]. Addition of Si also results in grain refinement of TiAlCrN coatings [64]. It has been reported that the addition of Y greatly improved oxidation resistance of heat-resistant alloys and several mechanisms have been proposed [245].…”

Section: Physicochemical Properties: Adaptive Nanostructured Coatingsmentioning

confidence: 99%

“…These coatings have a modulated chemical composition but similar characteristics of the alternating nanolayers (figure 6) [17,242] a)-(c)). The continuous columnar growth has been attributed to the alternating layers having the same B1 crystal structure [64]. This complex structure promotes beneficial tribochemical reactions on the friction surface, encouraging self-organization [52] and improvement of some critical micromechanical properties [241,242].…”

Section: Structural Characteristicsmentioning

confidence: 99%

“…It was shown that addition of Cr to the TiAlN-based coating strongly promotes its oxidation resistance owing to favorable changes in electronic and crystal structure [63,252]. Many studies aimed to improve oxidation resistance of various heat-resistant metallurgical systems such as alloys based on MCrAl (M = Ni, Fe, Co) [253] or TiAl [132] by incorporating various foreign elements such as Y [68,[254][255][256], Hf, Nb, B [257,258], V [259] or Si [64,109,111,217,260,261]. Among these dopants, Si and Y seem to be the most promising for improving the oxidation resistance of hard nitride coatings at relatively small concentrations.…”

Section: Physicochemical Properties: Adaptive Nanostructured Coatingsmentioning

confidence: 99%

“…This is a significant improvement to lower-ordered coatings such as TiAlCrN [63,86] and TiAlCrSiN [64]. DTA determines the thermal behavior of the coating and indicates formation of oxide films [268] that result in improvement of the thermal performance of the friction surface [269].…”

Section: Physicochemical Properties: Adaptive Nanostructured Coatingsmentioning

confidence: 99%

“…During the last decade, the Al-rich TiAlN PVD coatings [61] and Al-rich AlCrN-based coatings [62] were widely used for machining of hard to cut materials [3]. Systematic optimization of the coating composition was made by addition of various elements (such as Cr, Si, Y, B and others) to TiAlN [24,[63][64][65] and corresponding elements to AlCrN-based coatings [62,[66][67][68]. Various designs of hard coatings have been introduced as well [48,[69][70][71][72][73][74][75][76][77][78][79][80].…”

Section: Introductionmentioning

confidence: 99%

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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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