Comparison of Laboratory Compaction Methods using X-ray Computer Tomography

2007 ◽  
Vol 8 (2) ◽  
pp. 139-164 ◽  
Author(s):  
Manfred N Partl ◽  
Alexander Flisch ◽  
M Jönsson
Keyword(s):  
Computer Tomography ◽  
X Ray

scholarly journals Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials?

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1271
Author(s):  
Andreas Koenig ◽  
Leonie Schmohl ◽  
Johannes Scheffler ◽  
Florian Fuchs ◽  
Michaela Schulz-Siegmund ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Computer Tomography ◽  
Mechanical Performance ◽  
Dental Materials ◽  
Three Dimensional ◽  
X Rays ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Multiple Measurements ◽  
High Doses

The aim of the study was to investigate the effect of X-rays used in micro X-ray computer tomography (µXCT) on the mechanical performance and microstructure of a variety of dental materials. Standardised bending beams (2 × 2 × 25 mm3) were forwarded to irradiation with an industrial tomograph. Using three-dimensional datasets, the porosity of the materials was quantified and flexural strength was investigated prior to and after irradiation. The thermal properties of irradiated and unirradiated materials were analysed and compared by means of differential scanning calorimetry (DSC). Single µXCT measurements led to a significant decrease in flexural strength of polycarbonate with acrylnitril-butadien-styrol (PC-ABS). No significant influence in flexural strength was identified for resin-based composites (RBCs), poly(methyl methacrylate) (PMMA), and zinc phosphate cement (HAR) after a single irradiation by measurement. However, DSC results suggest that changes in the microstructure of PMMA are possible with increasing radiation doses (multiple measurements, longer measurements, higher output power from the X-ray tube). In summary, it must be assumed that X-ray radiation during µXCT measurement at high doses can lead to changes in the structure and properties of certain polymers.

An X-ray micro-computer tomography study of the Malpighian tubules of the Blue Bottle Blow Fly (Calliphora vomitoria) Diptera: Calliphoridae

Zoology ◽  
2021 ◽  
pp. 125972
Author(s):  
Duncan Bell ◽  
Nic Bury ◽  
Svetlana Gretton ◽  
Nick Corps ◽  
David Mortimore ◽  
...  
Keyword(s):  
Computer Tomography ◽  
Malpighian Tubules ◽  
Blow Fly ◽  
X Ray

Monitoring of water absorption in sedimentary rocks by X-ray computer tomography

2007 ◽  
pp. 57-60
Author(s):  
L Suárez del Río ◽  
C Celorio ◽  
A Rodríguez-Rey ◽  
J Descheirder ◽  
L Calleja ◽  
...  
Keyword(s):  
Water Absorption ◽  
Computer Tomography ◽  
Sedimentary Rocks ◽  
X Ray

Characteristics of x-ray computer tomography application to composite material research

1992 ◽  
Vol 63 (6) ◽  
pp. 1249-1255 ◽  
Author(s):  
V. I. Barakhov ◽  
V. A. Chernyaeva ◽  
V. S. Kiselev
Keyword(s):  
Composite Material ◽  
Computer Tomography ◽  
Material Research ◽  
X Ray

Role of x-ray examination methods in the diagnosis of endophytic stomach carcinomas

1998 ◽  
Vol 79 (6) ◽  
pp. 433-435
Author(s):  
А. N. Gorshkov ◽  
R. F. Akberov
Keyword(s):  
Computer Tomography ◽  
Endoscopic Examination ◽  
Stomach Carcinoma ◽  
X Ray ◽  
Examination Methods

The combined X-ray and endoscopic examination and X-ray computer tomography in 130 patients with endophytic stomach carcinoma are performed. The diagnosis is verified morphologically and is confirmed in operation. The role of X-ray examination methods in the diagnosis of endophytic stomach carcinoma is studied.

Impact of Reprocessing Technique on First Level Interconnects of Pb-Free to SnPb Reballed Area Array Flip Chip Devices

2014 ◽  
Vol 2014 (1) ◽  
pp. 000112-000116
Author(s):  
Joelle Arnold ◽  
Steph Gulbrandsen ◽  
Nathan Blattau
Keyword(s):  
Computer Tomography ◽  
Damage Accumulation ◽  
Flip Chip ◽  
Ball Grid Array ◽  
Acoustic Microscopy ◽  
Eutectic Solder ◽  
X Ray ◽  
Area Array ◽  
Solder Balls ◽  
Commercial Off The Shelf

The risk of damage caused by reballing SnPb eutectic solder balls onto a commercial off-the-shelf (COTS) active flip chip with a ball grid array (BGA) of SAC305 was studied. The effects of reballing performed by five different reballers were examined and compared. The active flip chip device selected included manufacturer specified resistance between eight (8) differential port pairs. The path resistance between these pins following reballing, as compared to an unreballed device, was used to assess damage accumulation in the package. 2-dimensional x-ray microscopy, acoustic microscopy, and x-ray computer tomography were also used to characterize the effects of reballing. These studies indicated that no measureable damage was incurred by the reballing process, implying that reballed devices should function as well as non-reballed devices in the same application.

Reconstruction Algorithm of Cone-Beam Phase X-Ray Computer-Tomography Based on Grating Imaging

2008 ◽  
Vol 28 (6) ◽  
pp. 1079-1084
Author(s):  
陈欣 Chen Xin ◽  
孙怡 Sun Yi ◽  
朱佩平 Zhu Peiping
Keyword(s):  
Computer Tomography ◽  
Reconstruction Algorithm ◽  
Cone Beam ◽  
X Ray
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