Results 41 to 50 of about 670,277 (302)

Evolution of Oxygen Deficiency Center on Fused Silica Surface Irradiated by Ultraviolet Laser and Posttreatment [PDF]

, 2014
Evolution of oxygen deficiency centers (ODCs) on a fused silica surface irradiated using a 355 nm ultraviolet (UV) laser beam in both vacuum and atmospheric conditions was quantitatively studied using photoluminescence and X-ray photoelectron ...
Hai-Bing Lü, Shi-Zhen Xu, Lü, Hai-Bing, Fu, Yong Qing, Yuan, Xiao-Dong, Y. Q. Fu, Wang, Hai-Jun, Hai-Jun Wang, Xiao-Dong Yuan, Chao Zhao, Xu, Shi-Zhen, Zhao, Chao   +11 more
core   +1 more source

A Novel Approach to Estimate the Transition Temperature via Dynamic Nanoindentation

Advanced Engineering Materials, EarlyView.
A new dynamic nanoindentation‐based method was developed that uses the stiffness ratio as an indicator of the elastic–plastic deformation contributions at different temperatures. The approach successfully identified transition temperatures in ferritic steel and distinguished them from continuously ductile austenitic steel.
Stefan Zeiler, Nikolaus Kostwein, Ronald Schnitzer, Christian Mitterer, Verena Maier‐Kiener   +4 more
wiley   +1 more source

Helium irradiation effects in polycrystalline Si, silica, and single crystal Si [PDF]

, 2012
Transmission electron microscopy (TEM) has been used to investigate the effects of room temperature 6 keV helium ion irradiation of a thin (≈55 nm thick) tri-layer consisting of polycrystalline Si, silica, and single-crystal Si.
Greaves, Graeme, Ward, M. B., Pawley, C. J., Abrams, K. J., Hinks, J. A., K. J. Abrams, D. Eyidi, G. Greaves, Greaves, G., Van den Berg, Jakob, S. E. Donnelly, Van Den Berg, J. A., Eyidi, D., Donnelly, S. E., J. A. Hinks, J. A. van den Berg, C. J. Pawley, M. B. Ward   +17 more
core   +1 more source

Cryogenic Deformation Behavior of TiAl and Insights Into Embrittlement After High‐Temperature Exposure Combined With Secondary Ion Mass Spectroscopy of Near Surface Chemistry

Advanced Engineering Materials, EarlyView.
Near‐surface deuterium enrichment profiles for different microstructural types of TiAl after exposure at 700 °C in a heavy water‐containing environment. The deuterium levels are significantly higher than expected from natural occurrence, indicating that the heavy water dissociated during the exposure treatment and entered the specimens.
Jonathan D. H. Paul, Alexander Welle, Dirk Matthiessen, Michael Oehring, Fritz Appel, Florian Pyczak   +5 more
wiley   +1 more source

Aggregation of concentrated colloidal silica dispersions in flow [PDF]

, 2007
Concentrated suspensions of nanoparticles subjected to transport or shear forces are commonly encountered in many processes such as precipitation, wet comminution or filtration. In these processes, particles are likely to undergo processes of aggregation
Frances, Christine, Tourbin, Mallorie, Mathé, Stéphane, Manero, Marie-Hélène, Biscans, Béatrice, Schetrite, Sylvie, Monneyron, Pierre, Bogle, D., Gani, Rafiqul   +8 more
core   +1 more source

3D‐Printed Titanium Gyroid Scaffold Structure Integrated With Tough Hybrid Materials for Cartilage Replacement

Advanced Engineering Materials, EarlyView.
This study proposes a potential device design for joint cartilage replacement. Silica‐polytetrahydrofuran (SiO2‐PolyTHF) hybrids with customizable mechanical properties were developed to mimic the characteristics of a natural meniscus. These were synthesized through a two‐pot sol–gel hybrid process.
Yu‐Chien Lin, Gloria R. Young, Francesca Tallia, Reece N. Oosterbeek, Shaaz Ghouse, Edward Spiers, Nupur Kohli, Tom Briggs, Marc Masen, Siwei Li, Ren‐Jei Chung, Jonathan R. T. Jeffers, Julian R. Jones   +12 more
wiley   +1 more source

Silica nanoparticles and their interaction with cells : a multidisciplinary approach [PDF]

, 2014
Silica nanoparticles are increasingly used as drug delivery systems and for biomedical imaging. Therapeutic and diagnostic agents can be incorporated into the silica matrix to improve the stability and solubility of hydrophobic drugs in biological ...
Kettiger, Hélène Emilie
core   +1 more source

Microstructure‑Dependent Phase Transformations Under High‑Pressure Laser Heating in Additively Manufactured AlCrFe2Ni2

Advanced Engineering Materials, EarlyView.
Additively manufactured AlCrFe2Ni2 with contrasting BCC/B2‐dominant and lamellar FCC + BCC/B2 microstructures exhibits the same pressure‐induced BCC/B2 → HCP transformation. Under laser heating at high pressure, HCP is destabilized, and a cubic BCC/B2 + FCC assemblage is recovered, while the lower‐scan‐speed microstructure transforms at a lower ...
Raimundas Sereika, Hunter Kantelis, Yogesh K. Vohra, Shengbiao Zhang, Wuxian Yang, Wen Chen   +5 more
wiley   +1 more source

Microstructural Evolution and In Situ Formation of TiB and TiC in Ti─5Al─2.5Sn Alloy Processed by Powder Metallurgy

Advanced Engineering Materials, EarlyView.
Accelerated in situ formation of TiB and TiC in Ti–5Al–2.5Sn–B4C is driven by transient liquid phase formation, which enhances particle reactions and microstructural evolution. This process increases hardness and establishes a coupled relationship between sintering temperature and reinforcement content, strongly influencing porosity in the resulting ...
Fernando. Y. Kojima, Juliano. Soyama
wiley   +1 more source

In vitro calcified matrix deposition by human osteoblasts onto a zinc-containing bioactive glass [PDF]

European Cells & Materials, 2011
Bioactive glasses synthesized by the sol-gel technique possess many of the qualities associated with an ideal scaffold material for a bone graft substitute.
E Saino, S Grandi, E Quartarone, V Maliardi, D Galli, N Bloise, L Fassina, MGC De Angelis, P Mustarelli, M Imbriani, L Visai   +10 more
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