Delivering microstructural complexity to additively manufactured metals through controlled mesoscale chemical heterogeneity

2022 ◽  
pp. 117637
Author(s):  
Huikai Li ◽  
Sebastian Thomas ◽  
Christopher Hutchinson
Keyword(s):  
Chemical Heterogeneity

Silicon Tetrachloride Synthesis from Rice Hulls: Transmission and Scanning Electron Microscope Study

1972 ◽  
Vol 30 ◽  
pp. 236-237 ◽  
Author(s):  
Richard S. Thomas ◽  
Prabir K. Basu ◽  
Francis T. Jones
Keyword(s):  
Silicon Tetrachloride ◽  
Silica Sand ◽  
Mineral Matter ◽  
Chemical Heterogeneity ◽  
Scanning Electron Microscope Study ◽  
Rice Hulls ◽  
Hull Structure ◽  
Lower Temperature ◽  
Image Position ◽  
Disposal Problem

Silicon tetrachloride, used in industry for the production of highest purity silicon and silica, is customarily manufactured from silica-sand and charcoal.SiCl4 can also be made from rice hulls, which contain up to 20 percent silica and only traces of other mineral matter. Hulls, after carbonization, actually prove superior as a starting material since they react at lower temperature. This use of rice hulls may offer a new, profitable solution for a rice mill byproduct disposal problem.In studies of the reaction kinetics with carbonized hulls, conversion of SiO2 to SiCl4 was found to proceed within a few minutes to a constant, limited yield which depended reproducibly on the ambient temperature of the reactor. See Fig. 1. This suggested that physical or chemical heterogeneity of the silica in the hull structure might be involved.

Chemical heterogeneity of soldier defensive secretions in the desert subterranean termite, Amitermes wheeleri

1986 ◽  
Vol 14 (6) ◽  
pp. 661-664 ◽  
Author(s):  
Rudolf H. Scheffrahn ◽  
Lyle K. Gaston ◽  
William L. Nutting ◽  
Michael K. Rust
Keyword(s):  
Subterranean Termite ◽  
Chemical Heterogeneity ◽  
Defensive Secretions

Chemical Heterogeneity in a Single Phase:  Bi0.15Ca0.85MnO3, a Case Example of Macroscopic Phase Segregation

2000 ◽  
Vol 12 (12) ◽  
pp. 3648-3657 ◽  
Author(s):  
A. Llobet ◽  
C. Frontera ◽  
J. L. García-Muñoz ◽  
C. Ritter ◽  
M. A. G. Aranda
Keyword(s):  
Single Phase ◽  
Phase Segregation ◽  
Chemical Heterogeneity

Geodynamical modeling and multiscale seismic expression of thermo-chemical heterogeneity and phase transitions in the lowermost mantle

2010 ◽  
Vol 180 (3-4) ◽  
pp. 244-257 ◽  
Author(s):  
Arie P. van den Berg ◽  
Maarten V. De Hoop ◽  
David A. Yuen ◽  
Anton Duchkov ◽  
Robert D. van der Hilst ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Chemical Heterogeneity ◽  
Lowermost Mantle

Comprehensive Methods for Studying Microinhomogeneity in Thermal Spray Coatings with Amorphous-Crystalline Structure

1998 ◽  
Author(s):  
G. Grigorenko ◽  
A. Borisova
Keyword(s):  
Thermal Spray ◽  
Crystalline Structure ◽  
Structural Phase ◽  
Thermal Spraying ◽  
Integrated Approach ◽  
Thermal Spray Coatings ◽  
Chemical Heterogeneity ◽  
New Approach ◽  
X Ray ◽  
Spray Coatings

Abstract An integrated approach was developed for investigation of thermal spray coatings with the amorphous-crystalline structure. The new approach combines methods of metallography, differential thermal and X-ray phase analysis, scanning electron microscopy and X-ray microanalysis. This makes it possible to reveal structural, phase and chemical heterogeneity, determine the degree of amorphization of coatings, temperature and heat of crystallization of the amorphous phase during heating. The new integrated approach was used to study amorphous-crystalline coatings of the Ni-P, Fe-Ni-B and Fe-B systems produced by thermal spraying.

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