Stress‐induced crystal axis spiral rotation in multiferroic β'‐Gd 2 (MoO 4 ) 3 observed only in glass crystallization

2020 ◽  
Vol 12 (1) ◽  
pp. 46-64
Author(s):  
Takayuki Komatsu ◽  
Tsuyoshi Honma
Keyword(s):  
Glass Crystallization ◽  
Crystal Axis

The Influence of the Carbonization Mechanisms on the Crystalline Quality of the Carbonization Layer for Heteroepitaxial Growth of 3C-SiC

2014 ◽  
Vol 778-780 ◽  
pp. 230-233
Author(s):  
Yukimune Watanabe ◽  
Tsuyoshi Horikawa ◽  
Kiichi Kamimura
Keyword(s):  
Diffusion Mechanism ◽  
Growth Direction ◽  
Crystalline Quality ◽  
Process Conditions ◽  
Heteroepitaxial Growth ◽  
Crystal Axis ◽  
Si Substrates ◽  
Selected Area Electron Diffraction ◽  
Better Than

The carbonized layer for a buffer layer strongly influences the crystalline quality of the 3C-SiC epitaxial films on the Si substrates. The growth mechanism of the carbonized layer strongly depended on the process conditions. The surface of silicon substrate was carbonized under the pressure of 7.8 × 10-3 Pa or 7.8 × 10-2 Pa in this research. Under the relatively low pressure of 7.8 × 10-3 Pa, the carbonized layer was grown by the epitaxial mechanism. The crystal axis of the carbonized layer grown under this pressure was confirmed to coincide with the crystal axis of the Si substrate from the results of the selected area electron diffraction (SAED) analysis. Under the relatively high pressure condition of 7.8 × 10-2 Pa, the carbonized layer was grown by the diffusion mechanism. The result of the SAED pattern and the XTEM image indicated that this layer consisted of small grainy crystals and their crystal axes inclined against the growth direction. It was confirmed that the crystalline quality of the SiC film deposited on the carbonized layer grown by the epitaxial mechanism is better than that deposited on the layer grown by the diffusion mechanism.

scholarly journals A novel ceramic material with medical application

2008 ◽  
Vol 2 (1) ◽  
pp. 19-22 ◽  
Author(s):  
Joanna Podporska ◽  
Marta Błażewicz ◽  
Barbara Trybalska ◽  
Łukasz Zych
Keyword(s):  
Body Fluid ◽  
Crystallization Process ◽  
Sol Gel ◽  
Medical Application ◽  
In Vitro Test ◽  
Glass Crystallization ◽  
Complex Shapes ◽  
Different Temperatures ◽  
Vitro Test

Until now the basic methods used in manufacturing of wollastonite have been chemical (melting together with glass crystallization process, chemical coprecipitation) and sol - gel methods. A new and promising way of wollastonite fabrication is controlled pyrolysis of polysiloxane precursors with inorganic fillers. Heat treatment of such mixtures leads to the formation of wollastonite-containing ceramics already at about 1000?C. This is a relatively inexpensive and efficient method which enables to obtain complex shapes of the samples. The aim of this work was to obtain sintered, wollastonite-containing bioceramics and determine its bioactive features. Samples were sintered at three different temperatures: 1000, 1100 and 1200?C. Then the bioactivity of the wollastonite-containing ceramics was investigated by the ?in vitro? test in simulated body fluid. On the basis of the achieved results, it can be assumed that the obtained material possesses bioactive features.

scholarly journals The Stress Induced Martensite-Austenite Interface in Fe-15Ni-15Cr Single Crystals

1973 ◽  
Vol 31 ◽  
pp. 110-111
Author(s):  
G. A. Stone ◽  
G. Thomas
Keyword(s):  
Shear Stress ◽  
Slip System ◽  
Single Crystal ◽  
Single Crystals ◽  
Habit Plane ◽  
Maximum Shear Stress ◽  
Crystal Axis ◽  
Surface Study

A single crystal stressed in the [3]𝛄 direction at 185°K was transformed to 5% 𝛂 martensite and 2% Ɛ martensite by volume. The austenite slip system of maximum shear stress is the (11)𝛄 [01)𝛄. Fig. 1 shows a two surface study using the electron and optical microscopes. The a martensite is confined between £martensite plates with the (0001)Ɛ ∥ (11)𝛄. The size of the acicular martensite crystals is controlled by the spacing of the £ martensite plates. These £ martensite plates are seen in Fig. 1A as dark vertical bands. The axes of the acicular crystals lie in the (11)𝛄 plane. The £ martensite habit plane is defined as the plane perpendicular to the (11)𝛄 containing the vector defining the crystal axis.

Fast and scalable preparation of tetrahedrite for thermoelectrics via glass crystallization

2016 ◽  
Vol 664 ◽  
pp. 209-217 ◽  
Author(s):  
A.P. Gonçalves ◽  
E.B. Lopes ◽  
J. Monnier ◽  
J. Bourgon ◽  
J.B. Vaney ◽  
...  
Keyword(s):  
Glass Crystallization

Macroscopic and micro-structural aspects of the lithium metaphosphate glass crystallization

2010 ◽  
Vol 356 (52-54) ◽  
pp. 2969-2976 ◽  
Author(s):  
Jean Rocherullé ◽  
Sébastien Chenu ◽  
Patricia Bénard-Rocherullé
Keyword(s):  
Glass Crystallization ◽  
Structural Aspects

3-D Photonic Band Structure Engineering in Self-Assembled Macroporous Photonic Crystals

2006 ◽  
Vol 988 ◽  
Author(s):  
Michael H. Bartl ◽  
Kaycee Carter ◽  
Michael H. Bartl
Keyword(s):  
Experimental Data ◽  
Photonic Crystals ◽  
Band Structure ◽  
Photonic Band Structure ◽  
Crystal Axis ◽  
Inverse Opals ◽  
Band Structure Calculations ◽  
Structure Engineering ◽  
Photonic Band ◽  
Structure Calculations

AbstractBy applying directional pressure along the (111) crystal axis of opaline photonic crystals under controlled temperatures, inverse opals with symmetry broken structures are fabricated. This selective deformation results in strongly modified photonic band structures and hence optical properties of the photonic crystals. Experimental data are accompanied by theoretical band structure calculations that confirm the experimental results and are used to predict new structures with optimized band gap properties.

Onset Temperatures and Kinetics of Quartz Glass Crystallization

2018 ◽  
Vol 63 (2) ◽  
pp. 290-294 ◽  
Author(s):  
A. I. Nepomnyashchikh ◽  
A. A. Shalaev ◽  
T. Yu. Sizova ◽  
A. S. Paklin ◽  
A. N. Sapozhnikov ◽  
...  
Keyword(s):  
Quartz Glass ◽  
Glass Crystallization ◽  
Kinetics Of
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