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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

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 ...

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.

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 …

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 ...

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

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, …

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.