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Superhard nanocomposite of dense polymorphs of boron nitride: Noncarbon material has reached diamond hardness
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10.1063/1.2711277
/content/aip/journal/apl/90/10/10.1063/1.2711277
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/10/10.1063/1.2711277
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Transformation pressure-temperature diagram of p-BN (hexagons, p-BN; squares p-BN and nanocrystalline w-BN and c-BN; diamonds, polycrystalline and nanocrystalline w-BN and c-BN; circles, polycrystalline c-BN). The pressure-temperature field corresponding to ABNNC with smallest nanosize particles and highest hardness is shaded. Lines are given as guides for the eyes: solid line separates the field, where the precursor is present; dotted line separates the field of single-phase c-BN.

Image of FIG. 2.
FIG. 2.

(Color online) (a) X-ray diffraction patterns of the samples synthesized at and various temperatures from pyrolytic p-BN (curve ). Symbols “h,” “w,” and “c” before crystallographic indices of reflections denote hexagonal, wurtzite, and sphalerite (cubic) phases, respectively. (b) Raman spectra of the same samples.

Image of FIG. 3.
FIG. 3.

(Color online) Vickers hardness as a function of the crystallite size. Triangles correspond to the data for ABNNC; inversed triangles, c-BN.

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/content/aip/journal/apl/90/10/10.1063/1.2711277
2007-03-08
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Superhard nanocomposite of dense polymorphs of boron nitride: Noncarbon material has reached diamond hardness
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/10/10.1063/1.2711277
10.1063/1.2711277
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