Results 21 to 30 of about 21,776 (269)

Low temperature self-densification of high strength bulk hexagonal boron nitride

Nature Communications, 2019
Sintering hexagonal boron nitride until it is more than 96% dense remains a challenge. Here, the authors mix cubic boron nitride particles into hexagonal boron nitride flakes and sinter the combined powders to obtain dense hexagonal boron nitride ...
Haotian Yang, Hailiang Fang, Hui Yu, Yongjun Chen, Lianjun Wang, Wan Jiang, Yiquan Wu, Jianlin Li   +7 more
doaj   +1 more source

High-Pressure Design of Advanced BN-Based Materials

Molecules, 2016
The aim of the present review is to highlight the state of the art in high-pressure design of new advanced materials based on boron nitride. Recent experimental achievements on the governing phase transformation, nanostructuring and chemical synthesis in
Oleksandr O. Kurakevych, Vladimir L. Solozhenko   +1 more
doaj   +1 more source

Thermodynamic Analysis about Nucleation and Growth of Cubic Boron Nitride Crystals in the hBN-Li3N System under High Pressure and High Temperature

Entropy, 2015
The nucleation of cubic boron nitride (cBN) single crystals synthesized with lithium nitride (Li3N) as a catalyst under high pressure and high temperature (HPHT) was analyzed.
Xiao-Fei Guo, Bin Xu, Wen Zhang, Mei-Zhe Lv, Hong-Mei Yang, Xiao-Hong Fan   +5 more
doaj   +1 more source

Production of nano- and micropowders of cubic BN from mechanically activated graphite-like BN under high pressures and temperatures using aluminium as a phase convertion initiator

Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2022
An effect of mechanical activation of graphite-like (hexagonal) boron nitride (hBN) on catalytic synthesis of nano- and micropowders of cubic boron nitride (cBN) under conditions of high pressures and temperatures is shown in the article.
V. T. Senyut
doaj   +1 more source

Spark plasma sintering of cBN(core)/SiO2(shell) powder prepared by rotary chemical vapor deposition

Journal of Asian Ceramic Societies, 2014
SiO2 nanolayer coated cubic boron nitride (cBN), cBN(core)/SiO2(shell) powder, was prepared by rotary chemical vapor deposition. The cBN/SiO2 powder was densified by spark plasma sintering at 1873 K for 0.3 ks. The hexagonal boron nitride (hBN) phase was
Jianfeng Zhang, Hirokazu Katsui, Zhenhua He, Takashi Goto   +3 more
doaj   +1 more source

Physics and chemistry of hydrogen in the vacancies of semiconductors [PDF]

, 2003
Hydrogen is well known to cause electrical passivation of lattice vacancies in semiconductors. This effect follows from the chemical passivation of the dangling bonds.
A. Fara, A. Gali, A. Zywietz, Adam Gali, B. Aradi, Bernadett Szûcs, C. G. Van de Walle, C. G. Van de Walle, C. Stampfl, Chris G. Van de Walle, D. M. Ceperley, G. A. Baraff, G. Makov, H. J. Monkhorst, H.-U. Baier, I. Gorczyca, I. Jiménez, J. Lu, J. Neugebauer, J. Neugebauer, J. P. Perdew, J.N. Russell, Jr., L. J. Schowalter, M. Bockstedte, M. Fanciulli, M. Yeadon, N. Troullier, P. Piquini, Peter Deák, T. Mattila, V. A. Gubanov, W. Kohn, W. Orellana, W. Orellana, Zoltán Hajnal   +34 more
core   +1 more source

Phase Stability of Hexagonal/Cubic Boron Nitride Nanocomposites

Nano Letters, 2023
29 pages, 5 ...
Abhijit Biswas, Rui Xu, Joyce Christiansen-Salameh, Eugene Jeong, Gustavo A. Alvarez, Chenxi Li, Anand B. Puthirath, Bin Gao, Arushi Garg, Tia Gray, Harikishan Kannan, Xiang Zhang, Jacob Elkins, Tymofii S. Pieshkov, Robert Vajtai, A. Glen Birdwell, Mahesh R. Neupane, Bradford B. Pate, Tony Ivanov, Elias J. Garratt, Pengcheng Dai, Hanyu Zhu, Zhiting Tian, Pulickel M. Ajayan   +23 more
openaire   +3 more sources

Phase boundary between Na-Si clathrates of structures I and II at high pressures and high temperatures [PDF]

, 2016
Understanding the covalent clathrate formation is a crucial point for the design of new superhard materials with intrinsic coupling of superhardness and metallic conductivity.
Godec, Yann Le, Guignot, Nicolas, Jouini, Zied, Kurakevych, Oleksandr O., Mezouar, Mohamed, Moutaabbid, Hicham   +5 more
core   +3 more sources

Thermal properties of polycrystalline cubic boron nitride sintered under high pressure condition [PDF]

Science of Sintering, 2018
The excellent thermal and chemical properties of cubic boron nitride (cBN) indicate that it is potential materials to prepare the thermal dissipate substrate applied in the electronic packaging.
Leng Chunwei, Hu Xiaojun, Xie Hongliang, Shen Chunhua   +3 more
doaj   +1 more source

Polycrystalline γ-boron: As hard as polycrystalline cubic boron nitride [PDF]

Scripta Materialia, 2012
The Vickers hardness of polycrystalline -B was measured using a diamond indentation method. The elastic properties of polycrystalline -B (B=213.9 GPa, G=227.2 GPa, and E=503.3 GPa) were determined using ultrasonic measurement at ambient condition.
Qin, Jiaqian, Nishiyama, Norimasa, Ohfuji, Hiroaki, Shinmei, Toru, Lei, Li, He, Duanwei, Irifune, Tetsuo   +6 more
openaire   +2 more sources