Real-Time Measurement of the Evolution of Growth Facets during SiC PVT Bulk Growth Using 3-D X-Ray Computed Tomography

2014 ◽  
Vol 778-780 ◽  
pp. 9-12 ◽  
Author(s):  
Georg Neubauer ◽  
Michael Salamon ◽  
Norman Uhlmann ◽  
Peter J. Wellmann
Keyword(s):  
Computed Tomography ◽  
Real Time ◽  
High Precision ◽  
Growth Interface ◽  
X Ray ◽  
Bulk Growth ◽  
Real Time Measurement ◽  
Growth System ◽  
X Ray Computed

In this paper, we present our new setup and technique for obtaining a real-time 3-D volume shape of the SiC crystal using X-ray computed tomography (CT). Hence, it is possible to determine in-situ the shape of the growth interface with high precision at growth temperatures above 2000 °C in a conventional 3" physical vapor transport (PVT) growth system. We show that the size and shape of a facet can be monitored at different stages during growth and furthermore the crystals face boundary can be determined with high precision throughout the whole growth process.

Application of 3-D X-Ray Computed Tomography for the In Situ Visualization of the SiC Crystal Growth Interface during PVT Bulk Growth

2013 ◽  
Vol 740-742 ◽  
pp. 27-30 ◽  
Author(s):  
Georg Neubauer ◽  
Michael Salamon ◽  
Florian Roider ◽  
Norman Uhlmann ◽  
Peter J. Wellmann
Keyword(s):  
Computed Tomography ◽  
Crystal Growth ◽  
Vapor Transport ◽  
Growth Interface ◽  
X Ray ◽  
Bulk Growth ◽  
Growth System ◽  
X Ray Computed ◽  
First Time

In this paper, we present for the first time an in-situ 3-D reconstruction of the SiC crystal growth interface using X-ray computed tomography (CT). We show that the shape of the growth interface can be determined with high precision at growth temperatures above 2100 °C in a conventional 3” PVT (physical vapor transport) growth system.

scholarly journals Process Monitoring Dataset from the Additive Manufacturing Metrology Testbed (AMMT): Overhang Part X4

2020 ◽  
Vol 125 ◽  
Author(s):  
Brandon Lane ◽  
Ho Yeung
Keyword(s):  
Computed Tomography ◽  
Additive Manufacturing ◽  
Real Time ◽  
Process Monitoring ◽  
Three Dimensional ◽  
Ex Situ ◽  
Web Page ◽  
X Ray ◽  
X Ray Computed

This document provides details on the files available in the dataset “Overhang Part X4” pertaining to a three-dimensional (3D) additive manufacturing (AM) build performed on the Additive Manufacturing Metrology Testbed (AMMT) by Ho Yeung and Brandon Lane on June 28, 2019. The files include the input command files, materials data, in-situ process monitoring data, and metadata. This data is one of a set of “AMMT Process Monitoring Datasets”, as part of the Metrology for Real-Time Monitoring of Additive Manufacturing project at the National Institute of Standards and Technology (NIST). Ex-situ part characterization data, including X-ray computed tomography (XCT) measurements, will be provided as it is made available. Readers should refer to the AMMT datasets web page for updates.

In-situ X-ray computed tomography of composites subjected to fatigue loading

2019 ◽  
Vol 236 ◽  
pp. 128-130 ◽  
Author(s):  
Peter Wagner ◽  
Oliver Schwarzhaupt ◽  
Michael May
Keyword(s):  
Computed Tomography ◽  
Fatigue Loading ◽  
X Ray ◽  
X Ray Computed

Quantitative In-situ Analysis of Water Transport in Concrete Completed Using X-ray Computed Tomography

2018 ◽  
Vol 127 (2) ◽  
pp. 371-389 ◽  
Author(s):  
Tyler Oesch ◽  
Frank Weise ◽  
Dietmar Meinel ◽  
Christian Gollwitzer
Keyword(s):  
Computed Tomography ◽  
Water Transport ◽  
In Situ Analysis ◽  
X Ray ◽  
X Ray Computed

scholarly journals Observation of microstructure change during freeze-drying by in-situ X-ray Computed Tomography

2018 ◽  
Author(s):  
Kyuya Nakagawa ◽  
Shinri Tamiya ◽  
Shu Sakamoto ◽  
Gabsoo Do ◽  
Shinji Kono ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Freeze Drying ◽  
Glassy State ◽  
Structural Deformation ◽  
Microstructure Formation ◽  
Microstructure Change ◽  
X Ray ◽  
X Ray Computed ◽  
The Many

X-ray computed tomography technique was used to observe microstructure formation during freeze-drying. A specially designed vacuum freeze-drying stage was equipped at the X-ray CT stage, and the frozen and dried microstructures of dextrin solutions were successfully observed. It was confirmed that the many parts of the pore microstructures formed as a replica of the original ice microstructures, whereas some parts formed as a consequence of the dehydration dependent on the relaxation level of the glassy phases, suggesting that the post-freezing annealing is advantageous for avoiding quality loss that relates to the structural deformation of glassy matters. Keywords: freeze-drying; X-ray CT; ice microstructure; glassy state

scholarly journals Collaborative ductile rupture mechanisms of high-purity copper identified by in situ X-ray computed tomography

2019 ◽  
Vol 181 ◽  
pp. 377-384 ◽  
Author(s):  
Brendan P. Croom ◽  
Helena Jin ◽  
Philip J. Noell ◽  
Brad L. Boyce ◽  
Xiaodong Li
Keyword(s):  
Computed Tomography ◽  
High Purity ◽  
Ductile Rupture ◽  
X Ray ◽  
X Ray Computed ◽  
Purity Copper
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