Mechanical properties of cBN–Al composite materials

McKie, Amanda; Winzer, Jami; Sigalas, Iakovos; Herrmann, Matthias; Weiler, Ludwig; Rödel, Jürgen; Can, Nedret

doi:10.1016/j.ceramint.2010.07.034

Cited by 105 publications

(49 citation statements)

References 20 publications

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“…A fraction of phases, in particular those formed during the high pressure and high temperature sintering process, have commonly very small grains and call for high resolution techniques. Many studies have been performed to investigate how related elements and materials sinter together and which phases that form [6][7][8][9][10][11][12]. However, the morphology and position of these presumably nano-sized phases, as well as the mechanisms behind their formation are not known.…”

Section: Introductionmentioning

confidence: 99%

Nanostructure of a cubic BN cutting tool material

Angseryd

Liu

Andrén

2015

International Journal of Refractory Metals and Hard Materials

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Section: Introductionmentioning

confidence: 99%

Nanostructure of a cubic BN cutting tool material

Angseryd

Liu

Andrén

2015

International Journal of Refractory Metals and Hard Materials

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“…It has been shown that lower CBN contents yields superior wear resistance in finish hard milling of tool steels [3,4]. On the other hand, direct correlation of hardness and fracture toughness to grain size and binder content has been studied and discussed by McKie and coworkers [5]. Surface topography can also have a relevant influence on the tool life.…”

Section: Introductionmentioning

confidence: 99%

Surface Topography Quantification of Super Hard Abrasive Tools by Laser Scanning Microscopy

Fang

Llanes

Engstler

et al. 2016

Materials Performance and Characterization

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Non-conventional super hard abrasive tools are made of composite materials containing super hard grains, e.g., diamond or cubic boron nitride (CBN) grains, bound by a metallic constitutive phase. These tools are usually produced by means of sintering, and are widely applied in the abrasive machining processes of modern manufacturing, especially in precision machining. The abrasive grains, which induce the material removal processes, are embedded in the metallic binder. They emerge as a consequence of self-dressing, resulting in a self-sharping effect. Therefore, the cutting surface of the tool displays an irregular topography. Quantification of surface topography scenario may supply valuable information to evaluate and understand its correlation to wear mechanisms. In this study, an experimental protocol consisting of five steps: specimen preparation, surface scanning, image assembly, image digital processing and surface quantification, is proposed and validated by characterizing two CBN honing tools used for precision machining: B151/L2/10/50 (B151) and B91/128/x44/35 (B91) CBN honing stones. It involves the use of laser scanning microscopy and digital imaging processing for assessing significant dimensional, geometrical and positional properties of CBN grains at the surface of super hard abrasive tools. It is shown that surface topography quantification is an effective method to evaluate and obtain the defined parameters. However, smaller grains may require images with higher resolution; and thus, scanning must be refined. Finally, a critical comparative analysis of the experimental results attained for the studied tools points out honing stone B91 as more appropriated than B151 one for achieving a higher machining quality of the workpiece.

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“…A highest density of 3.397 g/cm 3 was obtained with containing 12 wt% Al in starting materials, while the density of PcBN containing 5 wt% Al is 3.331 g/cm 3 . This is because that the reaction phases resulted in a strengthening effect in bonding cBN grains tightly.…”

Section: Figure II Sem Image Of the Pcbn Sample Figure Iii Hardnessmentioning

confidence: 89%

“…Metals of the groups IV, V and VI of the periodic table or their compounds or other metallic elements such as aluminium, cobalt and nickel are used as binders to aid sintering [3][4][5][6]. Chemical reactions between them and boron nitride occur, resulting in the formation of some new phases.…”

Section: Introductionmentioning

confidence: 99%