Characterization of fluid mixtures at high pressures using frequency response of microcantilevers

2017 ◽  
Vol 261 ◽  
pp. 202-209 ◽  
Author(s):  
Gamze Eriş ◽  
Shadi Khan Baloch ◽  
Asuman Aşıkoğlu Bozkurt ◽  
Alexandr Jonáš ◽  
Alper Kiraz ◽  
...  
Keyword(s):  
Frequency Response ◽  
High Pressures ◽  
Fluid Mixtures

Microstructural Characterization of High-Pressure Oxidized Si1-x Gex /Si Heterolayers

1992 ◽  
Vol 280 ◽  
Author(s):  
N. David Theodore ◽  
Gordon Tam
Keyword(s):  
Heterojunction Bipolar Transistors ◽  
Atmospheric Pressure ◽  
High Pressures ◽  
Microstructural Characterization ◽  
Bipolar Transistors ◽  
Pure Silicon ◽  
Device Structures ◽  
Microstructural Behavior ◽  
Very High

ABSTRACTSiGe alloys have recently been of interest for fabrication of heterojunction bipolar transistors using pre-existing or modified silicon-processing technology. These devices are faster than devices using pure silicon. Because of the interest in developing SiGe device structures, various elements of processing relevant to fabrication of the devices are being investigated. One such element has been the use of thermal oxidation for isolation of SiGe devices. Utilization of the technique requires an understanding of oxidation behavior of SiGe layers under a variety of oxidation conditions. Past studies in the literature have investigated the oxidation of SiGe at atmospheric pressure or at very high pressures (∼650–1300 atmospheres). The present study investigates the wet-oxidation of SiGe structures at intermediate pressures (∼25 atmospheres) and temperatures (∼750°C). Unlike atmospheric oxidation, most of the Ge (from SiGe) remains in the oxidized silicon (SiO2) in the form of GeO2. Occasional segregation of Ge to the oxidizing interface is noted. The microstructural behavior of partially and entirely oxidized structures is presented.

Characterization of optoacoustic transducers through the analysis of angular-dependent frequency response

2009 ◽  
Author(s):  
André Conjusteau ◽  
Sergey A. Ermilov ◽  
Richard Su ◽  
Hans-Peter Brecht ◽  
Matthew P. Fronheiser ◽  
...  
Keyword(s):  
Frequency Response ◽  
Dependent Frequency

Characterization of V-doped SnO2 nanoparticles at ambient and high pressures

2018 ◽  
Vol 5 (12) ◽  
pp. 125005 ◽  
Author(s):  
S Ferrari ◽  
V Bilovol ◽  
L G Pampillo ◽  
F Grinblat ◽  
F D Saccone ◽  
...  
Keyword(s):  
High Pressures ◽  
Sno2 Nanoparticles

CHARACTERIZATION OF Ti-35Nb ALLOY OBTAINED BY POWDER METALLURGY USING HIGH PRESSURES

2021 ◽  
Author(s):  
Thailler Machado Nunes da Silva ◽  
Hayka Vieira ◽  
Sergio Soares ◽  
Alexandra de Oliveira França Hayama
Keyword(s):  
Powder Metallurgy ◽  
High Pressures ◽  
35Nb Alloy

scholarly journals Elusive super-hard B6C accessible through the laser-floating zone method

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Bibi Malmal Moshtaghioun ◽  
Francisco L. Cumbrera ◽  
Diego Gómez-García ◽  
Jose I. Peña
Keyword(s):  
High Pressures ◽  
Ceramic Materials ◽  
Critical Conditions ◽  
Floating Zone ◽  
Zone Method ◽  
Promising Alternative ◽  
Theoretical Predictions ◽  
Near Future ◽  
Laser Floating Zone Technique

Abstract Boron carbide is among the most promising ceramic materials nowadays: their mechanical properties are outstanding, and they open potential critical applications in near future. Since sinterability is the most critical drawback to this goal, innovative and competitive sintering procedures are attractive research topics in the science and technology of this carbide. This work reports the pioneer use of the laser-floating zone technique with this carbide. Crystallographic, microstructural and mechanical characterization of the so-prepared samples is carefully analysed. One unexpected output is the fabrication of a B6C composite when critical conditions of growth rate are adopted. Since this is one of the hardest materials in Nature and it is achievable only under extremely high pressures and temperatures in hot-pressing, the use of this technique offers a promising alternative for the fabrication. Hardness and elastic modulus of this material reached to 52 GPa and 600 GPa respectively, which is close to theoretical predictions reported in literature.

Fluid mixtures at high pressures

1982 ◽  
pp. 191-229 ◽  
Author(s):  
J S Rowlinson ◽  
F L Swinton
Keyword(s):  
High Pressures ◽  
Fluid Mixtures

Fabrication and Characterization of Liquid and Gaseous Micro- and Nanojets

2005 ◽  
Author(s):  
Nisarga Naik ◽  
Christophe Courcimault ◽  
Hanif Hunter ◽  
John Berg ◽  
Jungchul Lee ◽  
...  
Keyword(s):  
Heat Flux ◽  
High Pressures ◽  
Flow Behavior ◽  
Three Dimensional ◽  
Jet Flows ◽  
Fully Developed Flow ◽  
Piezoresistive Cantilevers ◽  
Fabrication And Characterization

This paper reports on the fabrication and characterization of liquid and gaseous jets ejected from microfabricated nozzles with dimensions ranging from 500 nm to 12 μm. Unlike previous work reporting the fabrication of nano-orifices defined within the thickness of the substrates [1-4], the in-plane nanonozzles presented in this paper are designed to sustain the high pressures necessary to obtain substantial nanofluidic jet flows. This approach also allows important three-dimensional features of nozzle, channel and fluidic reservoir to be defined by design and not by fabrication constraints, thereby meeting important fluid-mechanical criteria such as a fully-developed flow. The shrinking jet dimensions demand new metrology tools to investigate their flow behavior. A laser shadowgraphy technique is used to visualize and image the jet flows. Micromachined heated and piezoresistive cantilevers are used to investigate the thrust and heat flux characteristics of the jets.

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