Results 11 to 20 of about 20,006 (235)

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

Effect of nanostructuration on compressibility of cubic BN [PDF]

, 2012
Compressibility of high-purity nanostructured cBN has been studied under quasi-hydrostatic conditions at 300 K up to 35 GPa using diamond anvil cell and angle-dispersive synchrotron X-ray powder diffraction.
A. Dewaele, A. Latapie, F. Birch, F. Datchi, G. Garbarino, H. Couvy, H.K. Mao, J. Furthmuller, J. Zhao, J.A. Lupo, J.S. Zhang, K. Albe, K. Karch, K. Takemura, M. Mezouar, O. O. Kurakevych, O. Yeheskel, P. Munsch, P. Vinet, S.J. Zhao, V. L. Solozhenko, V.L. Solozhenko, V.L. Solozhenko, W.B. Holzapfel, Y. Le Godec, Y. Zhao   +25 more
core   +4 more sources

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

Solid-State Chemistry with Nonmetal Nitrides [PDF]

, 1993
Among the nonmetal nitrides, the polymeric binary compounds BN and Si3N4are of particular interest for the development of materials for high-performance applications. The outstanding features of both substances are their thermal, mechanical, and chemical
Schnick, Wolfgang
core   +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

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 γ-B was measured using a diamond indentation method. The elastic properties of polycrystalline γ-B (B=213.9 GPa, G=227.2 GPa, and E=503.3 GPa) were determined using ultrasonic measurement at ambient condition. Under the loading force up to 20 N, our test gave an average Vickers hardness in the asymptotic-hardness
Qin, Jiaqian, Nishiyama, Norimasa, Ohfuji, Hiroaki, Shinmei, Toru, Lei, Li, He, Duanwei, Irifune, Tetsuo   +6 more
openaire   +2 more sources

Technics Research on Polycrystalline Cubic Boron Nitride Cutting Tools Dry Turning Ti-6AL-4V Alloy Based on Orthogonal Experimental Design

MATEC Web of Conferences, 2018
Ti-6Al-4V components are the most widely used titanium alloy products not only in the aerospace industry, but also for bio-medical applications. The machine-ability of titanium alloys is impaired by their high temperature chemical reactivity, low thermal
Jia Yunhai, Zhu Lixin
doaj   +2 more sources