Results 31 to 40 of about 21,776 (269)

Hard machining of agricultural machines parts

Research in Agricultural Engineering, 2013
For the renovation and/or improvement of the surface properties of machine elements, hard facing is often used. Hard structures obtained in layers or by heat treatment achieve a hardness of up to 68 hardness (HRC) or even more.
R. Drlička, J. Žarnovský, R. Mikuš, I. Kováč, M. Korenko   +4 more
doaj   +1 more source

Synthesis of cBN-hBN-SiC_w Nanocomposite with Superior Hardness, Strength, and Toughness

Nanomaterials, 2022
Nanocomposites with one-dimensional (1D) and two-dimensional (2D) phases can demonstrate superior hardness, fracture toughness, and flexural strength. Cubic boron nitride-hexagonal boron nitride-silicon carbide whiskers (cBN-hBN-SiCw) nanocomposites with
Lei Sun, Yitong Zou, Mengdong Ma, Guangqian Li, Xiaoyu Wang, Xiang Zhang, Zewen Zhuge, Bing Liu, Yingju Wu, Baozhong Li, Zhisheng Zhao   +10 more
doaj   +1 more source

Spontaneous graphitization of ultrathin cubic structures: A computational study

, 2014
Results based on {\em ab initio} density functional calculations indicate a general graphitization tendency in ultrathin slabs of cubic diamond, boron nitride, and many other cubic structures including rocksalt.
Kvashnin, Alexander G., Sorokin, Pavel B., Tománek, David, Zhu, Zhen   +3 more
core   +1 more source

HETERO-GRAPHENE AND HETERO-DIAMOND PHASES SYNTHESIZED IN THE B-C-N SYSTEM UNDER PRESSURE [PDF]

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2013
The phases formation in the B-C-N system at thermobaric treatment of mixtures of carbon nitride or melamine with boron has been studied. It was found that in the pressure range of 4-8 GPa graphite-like particles were formed first.
V.P. Filonenko, I.P. Zibrov, V.A. Sidorov, M.V. Trenihin   +3 more
doaj  

Superhydrophilic cubic boron nitride films

RSC Advances, 2016
Preparation of superhydrophilic cubic boron nitride (cBN) films with contact angles of polar and apolar liquids of almost zero degree.
Kungen Teii, Shinji Kawakami, Seiichiro Matsumoto   +2 more
openaire   +1 more source

Solid-state metathesis reactions under pressure: A rapid route to crystalline gallium nitride [PDF]

, 1998
High pressure chemistry has traditionally involved applying pressure and increasing temperature until conditions become thermodynamically favorable for phase transitions or reactions to occur.
Heath, James R., Kaner, Richard B., Kim, Sang-Ho, Nicol, Malcolm, Rao, Lin, Rose, Garry A., Wallace, Charles H.   +6 more
core   +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

Low pressure growth of cubic boron nitride films [PDF]

, 1997
A method for forming thin films of cubic boron nitride on substrates at low pressures and temperatures. A substrate is first coated with polycrystalline diamond to provide a uniform surface upon which cubic boron nitride can be deposited by chemical ...
Ong, Tiong P., Shing, Yuh-Han
core   +1 more source

Iron oxide doped boron nitride nanotubes: structural and magnetic properties

, 2010
A first-principles formalism is employed to investigate the interaction of iron oxide (FeO) with a boron nitride (BN) nanotube. The stable structure of the FeO-nanotube has Fe atoms binding N atoms, with bond length of roughly $\sim$2.1 \AA, and binding ...
Alan B de Oliveira, Daniel L Rocco, Fjellvåg H, Lee C H, Min Y, Ronaldo J C Batista, Skomski R, Soler J M, Xiang H J, Zaoui A   +9 more
core   +1 more source

Universal Electronic‐Structure Relationship Governing Intrinsic Magnetic Properties in Permanent Magnets

Advanced Functional Materials, EarlyView.
Permanent magnets derive their extraordinary strength from deep, universal electronic‐structure principles that control magnetization, anisotropy, and intrinsic performance. This work uncovers those governing rules, examines modern modeling and AI‐driven discovery methods, identifies critical bottlenecks, and reveals electronic fingerprints shared ...
Prashant Singh
wiley   +1 more source