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The effect of nitro...
The effect of nitrogen vacancies on initial wear in arc deposited (Ti-0.52,Ti- Al-0.48)N-y, (y < 1) coatings during machining
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- Calamba, Katherine (författare)
- Linköpings universitet,Nanostrukturerade material,Tekniska fakulteten,Univ Lorraine, France
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- Jöesaar Johansson, Mats (författare)
- Linköpings universitet,Nanostrukturerade material,Tekniska fakulteten,SECO Tools AB, Sweden
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- Bruyere, S. (författare)
- Univ Lorraine, France
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- Pierson, J. F. (författare)
- Univ Lorraine, France
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- Boyd, Robert (författare)
- Linköpings universitet,Plasma och ytbeläggningsfysik,Tekniska fakulteten
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- Andersson, J. M. (författare)
- SECO Tools AB, Sweden
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- Odén, Magnus (författare)
- Linköpings universitet,Nanostrukturerade material,Tekniska fakulteten
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(creator_code:org_t)
- ELSEVIER SCIENCE SA, 2019
- 2019
- Engelska.
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Ingår i: Surface & Coatings Technology. - : ELSEVIER SCIENCE SA. - 0257-8972 .- 1879-3347. ; 358, s. 452-460
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Nitrogen deficient c-(Ti0.52Al0.48)Ny, y = 0.92, y = 0.87, and y = 0.75 coatings were prepared in different N-2/Ar discharges on WC-Co inserts by reactive cathodic arc deposition. The microstructure of the y = 0.92 coating show that spinodal decomposition has occurred resulting in the formation of coherent c-TiN- and c-AIN rich domains during cutting. The y = 0.87 and y = 0.75 coatings have exhibited a delay in decomposition due to the presence of nitrogen vacancies that lowers the free energy of the system. In the decomposed structure, grain boundaries and misfit dislocations enhance the diffusion of elements from the workpiece and the substrate (e.g. Fe, Cr, and Co) into the coatings and it becomes more susceptible to crater wear. The y = 0.87 sample displays the highest crater wear resistance because of its dense grain boundaries that prevent chemical wear. The y = 0.92 sample has the best flank wear resistance because the decomposition results in age hardening. The y = 0.75 sample contains the MAX-phase Ti(2)AIN after cutting. The chemical alteration within the y = 0.75 sample and its high amount of macroparticles cause its low wear resistance. The different microstructure evolution caused by different amount of N-vacancies result in distinctive interactions between chip and coating, which also causes difference in the initial wear mechanism of the (Ti,Al)/N-y coatings.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Nyckelord
- Wear mechanism; Nitrogen vacancies; (Ti
- Al)N; Spinodal decomposition; MAX-phase; Cathodic arc
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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