Results 51 to 60 of about 34,611 (309)

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Coordinated optical and radar observations of ionospheric pumping for a frequency pass through the second electron gyroharmonic at HAARP [PDF]

, 2007
On 4 February 2005, the High-frequency Active Auroral Research Program (HAARP) facility was operated in O and X mode while pointing into the magnetic zenith to produce artificial optical emissions in the ionospheric F layer. The pump frequency was set to
Senior, Andrew, Pedersen, T., Kosch, Mike J., Bristow, B., Mishin, E., Watkins, B., Hughes, J., Oyama, S.   +7 more
core  

Downstream Electric Field Effects during Film Deposition with a Radio Frequency Plasma and Observations of Carbon Reduction

, 2022
Strong electric fields are generated by radio frequency (RF) plasma sources, and though the RF portion is too high a frequency for ions to react, the direct current (DC) portion of these fields has been shown to cause the atomic migration of metals ...
Dimka Georgieva, Kenneth Scott Alexander Butcher, Penka Terziyska, Vasil Georgiev, Rositsa Gergova, Peter W. Binsted   +5 more
core   +1 more source

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Influence of radio frequency wave driving frequency on capacitively coupled plasma discharge

AIP Advances
A two-dimensional symmetric fluid model is established to study the influence of radio frequency (RF) wave driving frequency on the capacitively coupled plasma discharge.
Song Yang, Wen Zhang, Junfeng Shen, Hai Liu, Changjian Tang, Yuhong Xu, Jun Cheng, Junren Shao, Jian Xiong, Xianqu Wang, Haifeng Liu, Jie Huang, Xin Zhang, Heng Lan, Yucai Li   +14 more
doaj   +1 more source

Experimental investigation of plasma instabilities by Fourier analysis in an electron cyclotron resonance ion source

Physical Review Accelerators and Beams, 2018
The plasma instabilities play an important role in an electron cyclotron resonance (ECR) ion source for the production of intense heavy ion beams in high charge states for particle accelerators.
Sarvesh Kumar, Jyotsna Sharma, Prashant Sharma, Shatendra Sharma, Yaduvansh Mathur, Devendra Sharma, Manish K. Kashyap   +6 more
doaj   +1 more source

Radio-induced incoherent scatter ion line enhancements with wide altitude extents in the high-latitude ionosphere [PDF]

, 2013
[1] Apparent large electron density enhancements deduced from incoherent scatter radar observations during recent high power radio wave injection experiments at the European Incoherent Scatter Scientific Association (EISCAT) facility near Tromsø, Norway ...
Rietveld, M. T., Senior, A., Kosch, M. J., Häggström, I.   +3 more
core  

Phenomena in the ionosphere-magnetosphere system induced by injection of powerful HF radio waves into nightside auroral ionosphere [PDF]

, 2005
International audienceExperimental results from three ionospheric HF pumping experiments in overdense E or F regions are summarized. The experiments were conducted by the use of the EISCAT HF Heating facility located near Tromsø, Norway, allowing HF ...
N. F. Blagoveshchenskaya, Bösinger, T., Rietveld, M. T., B. Thidé, Thidé, B., Borisova, T. D., T. D. Borisova, M. T. Rietveld, Kosch, M. J., V. A. Kornienko, M. J. Kosch, Blagoveshchenskaya, N. F., Kornienko, V. A., T. Bösinger   +13 more
core   +1 more source

A Dislocation Perspective on Strength and Toughness in Ceramics

Advanced Engineering Materials, EarlyView.
Dislocations in ceramics enjoy a long but yet under‐appreciated history. The three research waves for dislocations in ceramics highlight the topic evolution over the last 90 years. This review focuses on the impact of dislocation on strength and toughness in ceramics.
Xufei Fang
wiley   +1 more source

First Detection of Low-frequency Striae in Interplanetary Type III Radio Bursts

The Astrophysical Journal Letters
We report the first detection of type III solar radio burst striae in the 30–80 kHz range, observed by the Cluster-4 spacecraft during an exceptionally quiet solar period.
Vratislav Krupar, Eduard P. Kontar, Jan Soucek, Lynn B. Wilson III, Adam Szabo, Oksana Kruparova, Hamish A. S. Reid, Mychajlo Hajos, David Pisa, Ondrej Santolik, Milan Maksimovic, Jolene S. Pickett   +11 more
doaj   +1 more source