Results 51 to 60 of about 7,614 (217)
Flexoelectricity in Photoconversion: Fundamentals, Materials, and Outlooks
Advanced Science, EarlyView.Mechanical bending of a flexible cantilever induces a strain gradient in the photoactive material. The resulting flexoelectric field couples with photovoltaic and photoconductive effects, modulating charge generation, separation, and collection. A comparative analysis of oxide perovskites, halide perovskites, and two‐dimensional materials is presented,
Xiang Huang, Feng Li, Rongkun Zheng
wiley +1 more source
Research on PCBN Tool Dry Cutting GCr15
Machines, 2018 This paper is based on the theoretical analysis designs of a dry cutting orthogonal test in order to study a phenomenon that the radial force is larger than the main cutting force when a PCBN (polycrystalline cubic boron nitride) tool hard turns GCr15 ...
Qinghua Li +3 more
doaj +1 more source
Microstructures and mechanical properties of PCBN materials
Jin'gangshi yu moliao moju gongcheng, 2022 The PCBN material was prepared by high temperature and high pressure method at 1 500℃ and different holding times with CBN-TiN-Ti-Al2O3 as the initial raw material. The phase compositions, microstructures, mechanical properties and cutting performance of
Bin ZHANG, Hongyi GUO
doaj +1 more source
, 2011 The basic known and hypothetic one- and two-element phases of the B-C-N-O system (both superhard phases having diamond and boron structures and precursors to synthesize them) are described.
A. Badzian +135 more
core +1 more source
Application of Polycrystalline Cubic Boron Nitride for Cutting Tools.
THE REVIEW OF HIGH PRESSURE SCIENCE AND TECHNOLOGY, 1994 Polycrystalline cubic boron nitride (pcBN) materials, which are produced by sintering cBN powder and binder material under ultra-high pressure and temperature conditions, have so high hardness, high thermal conductivity and very weak affinity for ferrous metals that pcBN has been used for cutting ferrous metals such as hardened steel, cast iron, powder
openaire +2 more sources
Advanced Intelligent Discovery, EarlyView.We discovered novel materials with giant dielectric constants by combining first‐principles phonon calculations and machine learning. Screening 525 perovskites identified six candidates. RbNbO3 was synthesized under pressure and showed ε ≈ 800–1000. This validates our framework as a powerful tool for high‐performance dielectric materials discovery.
Hiroki Moriwake +9 more
wiley +1 more source
Influence of the preparation processes on the residual stresses in PCD and PcBN tools
European Journal of MaterialsUltra-hard cutting materials such as polycrystalline diamond (PCD) and cubic boron nitride (PcBN) are increasingly being used as cutting tools in machining.
Bernd Breidenstein +2 more
doaj +1 more source
Cailiao gongcheng, 2018 Polycrystalline cubic boron nitride(PcBN) was prepared under a high temperature and an ultra-high pressure using an in situ synthesis method. The influence of sintering temperature on composition, micro-structure, relative density, porosity and ...
YU Wen-lin +4 more
doaj +1 more source
Effect of surface pretreatments on the deposition of polycrystalline diamond on silicon nitride substrates using hot filament chemical vapor deposition method [PDF]
, 2009 The deposition of diamond films on a silicon nitride (Si3N4) substrate is an attractive technique for industrial applications because of the excellent properties of diamond. Diamond possesses remarkable physical and mechanical properties such as chemical
Awang Sh'ri, Dayangku Noorfazidah
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Melting of B12P2 boron subphosphide under pressure
, 2016 Melting of boron subphosphide (B12P2) to 26 GPa has been studied by in situ synchrotron X-ray powder diffraction in a laser-heated diamond anvil cell, and by quenching and electrical resistance measurements in a toroid-type high-pressure apparatus. B12P2
Cherednichenko, Kirill A. +5 more
core +1 more source