Room-Temperature Hydrogen Absorption of Ti with Robust Surface Coated by Hexagonal Boron Nitride

Graphene and hexagonal boron nitride (hBN) have shown fascinating features in spintronics due to their metallic and tunneling behaviors, respectively. In this work, we report for the first time room temperature spin valve effect in NiFe/Gr–hBN/Co configuration.

Download Full-text

Tribological and Corrosion Behavior of HVOF Sprayed Cr3C2-NiCr with Nickel Cladded Graphite and Hexagonal Boron Nitride

10.31399/asm.cp.itsc2021p0732 ◽

2021 ◽

Author(s):

M. Oechsner ◽

T. Engler ◽

H. Scheerer ◽

Y. Joung ◽

K. Bobzin ◽

...

Keyword(s):

Boron Nitride ◽

Friction And Wear ◽

Room Temperature ◽

Solid Lubricant ◽

Hexagonal Boron Nitride ◽

Solid Lubricants ◽

Wear Behaviour ◽

Wear Volume ◽

Coating Microstructure ◽

Sprayed Coatings

Abstract High-velocity oxyfuel (HVOF) sprayed coatings of Cr3C2-NiCr containing solid lubricants such as nickel cladded graphite and hexagonal boron nitride were successfully developed and characterised with the aim of optimizing their friction and wear behaviour. HVOF technology was used for the integration of solid lubricants to achieve strong cohesion between particles while minimizing thermal decomposition. Coating microstructure and composition were measured and correlated to the results of tribological and corrosion tests. The integration of the solid lubricant greatly reduced friction and wear volume at room temperature, but the lubricating effect was highly dependent on atmosphere and temperature. Cr3C2-NiCr with hBN, however, tends to exhibit more stable wear resistance over a wider temperature range and can be used at temperatures beyond 450 °C.

Download Full-text

Formation of quantum emitter arrays in hexagonal Boron Nitride at room temperature

Conference on Lasers and Electro-Optics ◽

10.1364/cleo_qels.2018.ftu4h.1 ◽

2018 ◽

Author(s):

Nicholas V Proscia ◽

Zav Shoton ◽

Harishankar Jayakumar ◽

Prithvi Reddy ◽

Michael Dollar ◽

...

Keyword(s):

Boron Nitride ◽

Room Temperature ◽

Hexagonal Boron Nitride ◽

Quantum Emitter

Download Full-text

Room-temperature quantum emitter arrays in hexagonal boron nitride

Frontiers in Optics 2017 ◽

10.1364/fio.2017.jw3a.122 ◽

2017 ◽

Cited By ~ 1

Author(s):

Nicholas V Proscia ◽

Zav Shoton ◽

Harishankar Jayakumar ◽

Prithvi Reddy ◽

Marcus Doherty ◽

...

Keyword(s):

Boron Nitride ◽

Room Temperature ◽

Hexagonal Boron Nitride ◽

Quantum Emitter

Download Full-text

Influence of Graphite on Tribological Properties of Hexagonal Boron Nitride Hybrid/Polyimide Composites in Wide Temperature Range

Journal of Tribology ◽

10.1115/1.4036935 ◽

2017 ◽

Vol 140 (1) ◽

Cited By ~ 2

Author(s):

Yanming Wang ◽

Peng Cai ◽

Tingmei Wang ◽

Qihua Wang

Keyword(s):

Mechanical Properties ◽

High Temperature ◽

Boron Nitride ◽

Room Temperature ◽

Hexagonal Boron Nitride ◽

Transfer Film ◽

Antiwear Property ◽

Wear Rates ◽

Higher Temperature ◽

Polyimide Composites

Tribological and mechanical properties of aramid fiber (AF), graphite (Gr), and hexagonal boron nitride (h-BN) hybrid polyimide composites were investigated under room and high temperature. Results show that, Gr in composite reinforced with AF and h-BN can reduce coefficient of friction (COF) and improve antiwear property of composites under room temperature. Gr can accelerate the formation of transfer film under high temperature without sacrificing the wear resistant of composites. Transfer film of composites reinforced with Gr and h-BN simultaneously present more smooth and uniform compared with that of composites reinforced with only AF and h-BN. However, under higher temperature, composite reinforced with pure Gr present higher COFs and wear rates (WRs) compared with composites filled with h-BN and Gr simultaneously. Comprehensively, composite filled with 10% AF, 3% h-BN, and 4% Gr is the optimum composition.

Download Full-text

Hexagonal Boron Nitride-Based Electrolyte Composite for Li-Ion Battery Operation from Room Temperature to 150 °C

Advanced Energy Materials ◽

10.1002/aenm.201600218 ◽

2016 ◽

Vol 6 (12) ◽

pp. 1600218 ◽

Cited By ~ 58

Author(s):

Marco-Tulio F. Rodrigues ◽

Kaushik Kalaga ◽

Hemtej Gullapalli ◽

Ganguli Babu ◽

Arava Leela Mohana Reddy ◽

...

Keyword(s):

Boron Nitride ◽

Room Temperature ◽

Hexagonal Boron Nitride ◽

Li Ion Battery ◽

Li Ion

Download Full-text

Design of photonic microcavities in hexagonal boron nitride

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.9.12 ◽

2018 ◽

Vol 9 ◽

pp. 102-108 ◽

Cited By ~ 2

Author(s):

Sejeong Kim ◽

Milos Toth ◽

Igor Aharonovich

Keyword(s):

Photonic Crystal ◽

Boron Nitride ◽

Room Temperature ◽

Emission Rate ◽

Hexagonal Boron Nitride ◽

Two Dimensional ◽

Spontaneous Emission Rate ◽

Photonic Crystal Cavities ◽

Optical Modes ◽

Optimal Coupling

We propose and design photonic crystal cavities (PCCs) in hexagonal boron nitride (hBN) for diverse photonic and quantum applications. Two dimensional (2D) hBN flakes contain quantum emitters which are ultra-bright and photostable at room temperature. To achieve optimal coupling of these emitters to optical resonators, fabrication of cavities from hBN is therefore required to maximize the overlap between cavity optical modes and the emitters. Here, we design 2D and 1D PCCs using anisotropic indices of hBN. The influence of underlying substrates and material absorption are investigated, and spontaneous emission rate enhancements are calculated. Our results are promising for future quantum photonic experiments with hBN.

Download Full-text

Engineering of Room Temperature Spin Defects in Hexagonal Boron Nitride

10.1364/cleo_qels.2021.fth4m.7 ◽

2021 ◽

Author(s):

Mehran Kianinia ◽

Simon White ◽

Johannes E. Fröch ◽

Carlo Bradac ◽

Igor Aharonovich

Keyword(s):

Boron Nitride ◽

Room Temperature ◽

Hexagonal Boron Nitride

Download Full-text

High Surface and High Nanoporosity Boron Nitride Adapted to Hydrogen Sequestration

Materials Science Forum ◽

10.4028/www.scientific.net/msf.555.355 ◽

2007 ◽

Vol 555 ◽

pp. 355-362 ◽

Cited By ~ 4

Author(s):

L. Laversenne ◽

Š. Miljanić ◽

Philippe Miele ◽

Christelle Goutaudier ◽

B. Bonnetot

Keyword(s):

Boron Nitride ◽

Room Temperature ◽

Storage Capacity ◽

Hexagonal Boron Nitride ◽

High Surface ◽

High Surface Area ◽

Specific Area ◽

Nitrogen Atmosphere ◽

Molecular Precursors ◽

One Step

High surface area nanoporous powders of hexagonal boron nitride (h-BN) have been prepared from molecular precursors to be used for hydrogen sequestration. The more promising samples were obtained using a precursor derived from trichloroborazine (TCB). The precursor was first reacted with ammonia at room temperature leading to the molecular complex Cl3B3N3H3, 6 NH3 which was heated up to 650 °C under ammonia and then up to 1000 °C under nitrogen, giving rise to a high reactive h-BN powder. This crude powder was stabilised by an annealing up to 1800 °C under nitrogen atmosphere leading to a very stable compound exhibiting a specific area of more than 300 m2·g-1 and presenting a very specific nanometric spherical texture. Some samples were doped with platinum (about 1 wt.%) to enhance the activity of pure h-BN using an original one step synthesis route starting from a mixture of BN and Pt precursors. Attempts to sequester hydrogen into these powders were made successfully at -196 °C under 10 MPa, but the stored amount was only about 0.3 wt.% and the platinum added BN powders did not lead to an enhancement of the storage capacity.

Download Full-text