Results 41 to 50 of about 2,664 (204)

Non‐Noble Metal Nanocatalysts for Hydrogen Evolution

Advanced Science, EarlyView.
Recent overviews and latest developments of diverse classes of non‐noble catalysts for application toward high‐performance photocatalysis, thermocatalytic steam reforming, and electrocatalysis. Toward sustainability objectives, several advanced characterization tools in combination with the latest breakthroughs in machine learning for material ...
Lina Jaya Diguna, Gede Herry Arum Wijaya, Md Abdul Kuddus Sheikh, Tobias Haposan, Fidelis Stefanus Hubertson Simanjuntak, Arramel Arramel, Muhammad Danang Birowosuto, Konstantin Sergeevich Novoselov   +7 more
wiley   +1 more source

Research Update: Direct conversion of h-BN into pure c-BN at ambient temperatures and pressures in air

APL Materials, 2016
We report a direct conversion of hexagonal boron nitride (h-BN) into pure cubic boron nitride (c-BN) by nanosecond laser melting at ambient temperatures and atmospheric pressure in air.
Jagdish Narayan, Anagh Bhaumik
doaj   +1 more source

Properties of Al contacts to Si surface exposed in the course of plasma etching of previously grown nanocrystalline c-BN film

Journal of Telecommunications and Information Technology, 2005
Properties of Al electric contacts to Si(p) surface exposed to fluorine-based plasma etching of nanocrystalline cubic boron nitride (c-BN) film grown previously were studied and compared to the properties of Al contacts fabricated on pristine or dry ...
Piotr Firek, Aleksander Werbowy, Jan Szmidt, Andrzej R. Olszyna   +3 more
doaj   +1 more source

On the cutting force of micro-textured polycrystalline cubic boron nitride cutting tool for powder metallurgy materials

Advances in Mechanical Engineering, 2020
Micro-textured cutting tools were widely reported due to the improved cutting performance, for example, the reduction of cutting forces. However, the cutting performance is significantly dependent on the parameters of the micro-textures.
Haidong Yang, Zhengguang Han, Xiquan Xia, Qidong Wang, Juchen Zhang, Weijie Chang, Zhenhua Qing, Huohong Tang, Shunhua Chen   +8 more
doaj   +1 more source

Hexagonal Boron Nitride on Liquid and Single‐Crystal Copper: Operando X‐Ray and Atomistic Insights into Growth and Interfacial Structure

Advanced Science, EarlyView.
Liquid metal catalysts are widely assumed to promote high‐quality 2D growth. In this work, operando experiments and machine‐learning‐accelerated simulations show that hBN on Cu breaks this graphene‐derived expectation, where molten Cu promotes multilayer/3D growth, but re‐solidified single‐crystal Cu stabilizes monolayer formation.
Nikoo Ghanadan, Valentina Rein, Hao Gao, Egor Bersenev, Thomas Sarrazin, Manmeet Kaur Sodhi, Bárbara Canto, Irina Snigireva, Nicolas Gauthier, Anastasios C. Manikas, Costas Galiotis, Maciej Jankowski, Gilles Renaud, Athanasios Dimoulas, Karsten Reuter, Oleg Konovalov, Hendrik H. Heenen, Irene M.N. Groot   +17 more
wiley   +1 more source

Raman Evidence of Moiré Diamondene Formation by High‐Pressure

Advanced Science, EarlyView.
Two‐dimensional moiré diamondene is formed at approximately 2 GPa through the synergy of high pressure, interlayer twist, and a chemically active diamond (100) surface. It is a hybrid sp2–sp3 nanostructure, consists of localized nanodiamond domains and unbonded graphene segments.
Chaofeng Gao, Mingming Chang, Mengting Wang, Yu Chen, Shiyun Zheng, Jiankuan Wu, Min Chen, Keying Han, Luyuan Fan, Zhenxiao Zhang, Kun Zhai, Bochong Wang, Congpu Mu, Yingchun Cheng   +13 more
wiley   +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

Metal Battery Anode: Rich in Electrons, Rich in Problems: A Critical Review from Industrial Perspectives

Advanced Science, EarlyView.
Metal‐anode batteries using Li, Na, Mg, and Ca offer exceptionally high energy density, but dendrites, unstable interphases, cracking, and pore formation hinder durability and safety. This review shows how careful electrolyte and interphase design can stabilize these reactive metals.
Jian Pan, Chan Shu, Oscar Tutusaus, Rana Mohtadi   +3 more
wiley   +1 more source

Efficiency of face milling hardened steels with cubic boron nitride tools

Технічна інженерія
Face milling of hardened steels is an important process in modern mechanical engineering, as it allows achieving high precision and quality of machined surfaces of machine parts.
V.S. Antonyuk
doaj   +1 more source

Electrodischarge Drilling of Microholes in c-BN

Micromachines, 2020
Cubic boron nitride (c-BN) is a “difficult-to-cut” material. High precision machining of this material is problematic because it is difficult to control the material removal rate and maintain acceptable accuracy.
Dominik Wyszynski, Wojciech Bizon, Krzysztof Miernik   +2 more
doaj   +1 more source