Results 111 to 120 of about 992,437 (326)

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source

White light emission from Eu, Dy doped NaCa(PO3)3 phosphor for WLED applications

Next Materials
This article reports on the emission of white light from Eu and Dy-doped NaCa(PO3)3 phosphor prepared through the solid-state reaction (SSR) method.
Ajay Narayan Sahu, Piyush Jha, Ayush Khare, V.K. Chandra   +3 more
doaj   +1 more source

Recent progress in the device architecture of white quantum-dot light-emitting diodes

Journal of Information Display, 2019
White-light-emission quantum dot light-emitting diodes (WQLEDs) have attracted great attention of late because they could have potential applications in both flat-panel displays and solid-state lighting due to their advantages of tunable emission spectra,
Heng Zhang, Qiang Su, Shuming Chen
doaj   +1 more source

A new super-soft X-ray source in the Small Magellanic Cloud: Discovery of the first Be/white dwarf system in the SMC?

, 2011
The Small Magellanic Cloud (SMC) hosts a large number of Be/X-ray binaries, however no Be/white dwarf system is known so far, although population synthesis calculations predict that they might be more frequent than Be/neutron star systems.
Coe, M. J., Haberl, F., La Palombara, N., Mereghetti, S., Owen, R. A., Pietsch, W., Sturm, R., Udalski, A.   +7 more
core   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Precision optical model of asymmetry emission band of red light emitting diodes and its application in improving the color rendering index of white LEDs

Results in Optics
We have proposed and demonstrated a precision optical model for red light-emitting diodes and applied this model to improve the color rendering index of phosphor-converted white light-emitting diodes.
Thi-Hanh-Thu Vu, Quang-Khoi Nguyen
doaj   +1 more source

Synthesis and tunable luminescent properties of Eu-doped Ca2NaSiO4F – Coexistence of the Eu2+ and Eu3+ centers

Results in Physics, 2016
Novel phosphors Ca2NaSiO4F:Eu were synthesized successfully by the conventional solid-state method in CO atmosphere, and their spectroscopic properties in UV−vis region were investigated.
Mubiao Xie, Dongyu Li, Guoxian Zhu, Rongkai Pan, Xionghui Fu   +4 more
doaj   +1 more source

White-light emission from GaAs m.o.s. structures

Electronics Letters, 1978
Emission of light from GaAs m.o.s. structures with anodic native oxides is reported. The spectrum is continuous, covers the visible range and has substantial parts that have higher photon energies than the GaAs energy gap. A part of the emission therefore seems to originate from the amorphous native GaAs oxide with its wide energy gap of about 4.5 eV ...
B. Bayraktaroglu, H.L. Hartnagel
openaire   +1 more source

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

Advanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song, Stefan Rettinger, Chengzhang Xu, Ulrich Mansfeld, Markus Retsch   +4 more
wiley   +1 more source

Gram‐Scale Synthesis of 41% Efficient Single‐Component White‐Light‐Emissive Carbonized Polymer Dots with Hybrid Fluorescence/Phosphorescence for White Light‐Emitting Diodes

Advanced Science, 2020
Fluorescent carbon dots (CDs) are compelling optical emitters to construct white light‐emitting diodes (WLEDs). However, it remains a challenge to achieve large‐scale and highly efficient single‐component white‐light‐emissive CDs suitable for WLED ...
Zifei Wang, Yang Liu, Shijie Zhen, Xiaoxi Li, Weiguang Zhang, Xun Sun, Baoyuan Xu, Xue Wang, Zhenhua Gao, Xiangeng Meng   +9 more
doaj   +1 more source