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10043-11-5 - Boron nitride, 99.5% (metals basis) - …

2020-12-8 · He, J.; Liu, Z. Ultrahard Nanotwinned Cubic Boron Nitride. Nature 2013, 493, 385-388. GHS Hazard and Precautionary Statements. Hazard Statements: H335 May cause respiratory irritation. Precautionary Statements: P271-P304+P340-P312-P501c-X Use only outdoors or in a well-ventilated area. IF INHALED: Remove to fresh air and keep at rest in a ...

Controversy about ultrahard nanotwinned cBN, …

Controversy about ultrahard nanotwinned cBN Controversy about ultrahard nanotwinned cBN Dubrovinsky, Leonid; Dubrovinskaia, Natalia 2013-10-23 00:00:00 Arising from Y. Tian et al. Nature 493 , 385 – 388 ( 2013 ) Tian et al. report synthesis of “nanotwinned” cubic boron nitride (“nt-cBN”). These authors claim that its unprecedented Vickers hardness of 108 GPa is due to nanotwinning ...

Controversy about ultrahard nanotwinned cBN, …

Detwinning Mechanism for Nanotwinned Cubic Boron …

Synthesized nanotwinned cubic boron nitride (nt-cBN) and nanotwinned diamond (nt-diamond) exhibit extremely high hardness and excellent stability, in which nanotwinned structure plays a crucial role. Here we reveal by first-principles calculations a strengthening mechanism of detwinning, which is induced by partial slip on a glide-set plane. We found that continuous partial slip in the ...

Development of an ultrahard nanotwinned cBN micro …

2016-5-28 · Binderless nanotwinned cubic boron nitride (nt-cBN) synthesized from onion-structured BN precursors under high pressure and high temperature shows a very fine microstructure consisting of densely lamellar nanotwins (average thickness of 4 nm) within nanograins. The unique nanotwinned microstructure offers high hardness, wear resistance, fracture toughness, and thermal stability which …

Dislocation behaviors in nanotwinned diamond | …

Experimental results (Huang et al .) indicated that nanotwinned diamond (nt-diamond) has unprecedented hardness, whose physical mechanism has remained elusive. In this report, we categorize interaction modes between dislocations and twin planes in nt-diamond and calculate the associated reaction heat, activation energies, and barrier strength using molecular dynamics.

Large indentation strain-stiffening in nanotwinned …

Tian, Y. et al. Ultrahard nanotwinned cubic boron nitride. Nature 493 , 385–388 (2013). CAS Article ADS PubMed Google Scholar

Large indentation strain-stiffening in nanotwinned …

Tian, Y. et al. Ultrahard nanotwinned cubic boron nitride. Nature 493 , 385–388 (2013). CAS Article ADS PubMed Google Scholar

Ultrahard and stable nanostructured cubic boron …

2020-6-1 · 1. Introduction. Cubic boron nitride (cBN) is irreplaceable in modern industry owing to its mechanical and physical properties, such as high hardness, high chemical stability, extreme wear resistance, and excellent thermal conductivity [, , , , , ].Specifically, the thermal and chemical stabilities of cBN are much higher than those of diamond, and this material remains stable during processing ...

Ultrahard nanotwinned cubic boron nitride, Nature | …

Ultrahard nanotwinned cubic boron nitride Xu, Bo; Yu, Dongli; Ma, Yanming; Wang, Yanbin; Jiang, Yingbing; Hu, Wentao; Tang, Chengchun; Gao, Yufei; Luo, Kun; Zhao, Zhisheng; Wang, Li-Min; Wen, Bin; He, Julong; Liu, Zhongyuan; Tian, Yongjun 2013-01-16 00:00:00 Cubic boron nitride (cBN) is a well known superhard material that has a wide range of ...

Ultrahard stitching of nanotwinned diamond and …

title = "Ultrahard stitching of nanotwinned diamond and cubic boron nitride in C 2-BN composite", abstract = "Materials combining the hardness and strength of diamond with the higher thermal stability of cubic boron nitride (cBN) have broad potential value in science and engineering.

Ultrahard stitching of nanotwinned diamond and …

Small onion-like BN leads to ultrafine-twinned cubic BN

Nanotwinned cubic boron nitride (nt-cBN) with remarkable hardness, toughness, and stability has attracted widespread attention due to its distinct scientific and industrial importance. The key for nt-cBN synthesis is to adopt an onion-like BN (oBN) nano-precursor and induce phase transition under high pressure. Here, we found that the size change of oBN used greatly affected the mechanical ...