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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Surface and Coatings...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Surface and Coatings Technology
Article . 2002 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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Pulsed laser deposition of AlMgB14 on carbide inserts for metal cutting

Authors: Ram Cherukuri; Melissa Womack; Pal Molian; Alan Russell; Yun Tian;

Pulsed laser deposition of AlMgB14 on carbide inserts for metal cutting

Abstract

Abstract Nanocrystalline AlMgB 14 containing 0–30 mol% additives are a family of new superhard materials with hardness comparable to that of TiB 2 on the lower end and to that of cubic BN on the higher end. Compared with diamond and cubic BN, AlMgB 14 is an equilibrium material with excellent electrical conductivity, high chemical stability, and lower density. The projected cost of manufacture of the boride is 10% of the cost of diamond and cubic BN. AlMgB 14 materials appear to be congruently melting/evaporating, which would allow them to be processed with techniques such as pulsed laser deposition (PLD). In this work, the feasibility of PLD for synthesizing thin films of baseline AlMgB 14 (0% additive) is demonstrated and compared with TiB 2 . A 248-nm, 23-ns KrF excimer laser was used to prepare baseline boride thin films on cemented carbide (ANSI C-5 and C-2) tool inserts. The films were dark blue, continuous and fairly uniform with few particulates. An impact fracture test showed that adhesion of the films to the substrate was excellent. The deposition rate was 0.08 nm per pulse at an energy density of 7 J/cm 2 . Nanoindentation hardness tests revealed that the films exhibited hardness 60% higher than the carbide substrate. Lathe turning tests with cold-drawn 1045 steel bars indicated that C-5 tools coated with 0.5 μm baseline AlMgB 14 have an average flank wear reduction of 12% compared to uncoated C-5 tools. Further machining tests on C-2 tools showed that the tools coated with baseline boride have much better flank (23% reduction) and nose wear resistance (26% reduction) compared with TiB 2 coated tools. In addition, multilayer composite coating of AlMgB 14 and TiB 2 outperformed single layer boride coating in minimizing the tool wear. This pioneering work sets the stage and serves as a catalyst for rapid and innovative advances in the development of new boride materials for numerous tool and hard coating applications, including bulk cutting tools, hard and erosion-resistant coatings, wear-resistant electrical switch contacts, and conductive thin films for MEMS.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
46
Top 10%
Top 10%
Top 10%
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