Density gradients in ceramic pellets measured by computed tomography

Sawicka, B.D.; Palmer, B.J.F.

doi:10.1016/0168-9002(88)90997-7

Cited by 12 publications

(2 citation statements)

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“…In images having high contrast (low noise), point defects (i.e., small relative to the voxel size) can be detected and sized even if they are smaller than the spatial resolution of the image. Long-range density gradients (i.e, extending over a number of pixels) can be measured with an accuracy better than the image noise [2]. In this case, the absence of artifacts is important, since artifacts can simulate or shield the density gradients.…”

Section: Experimental Procedure: Ceramic Preparationmentioning

confidence: 99%

“…cr examinations were performed at AECL Research Chalk River Laboratories. Images were generated using a first-generation (translate/rotate, single detector) y-ray tomograph [1][2][3][4][5][6] (Figure 2). The scanner comprises a radioactive source (50 Ci of 6OCO or 192Ir), a CsF detector and associated electronics, a computer-controlled stage that rotates and translates a test object through the y-ray beam, and a computerized data acquisition and control system.…”

Section: Experimental Procedure: Ceramic Preparationmentioning

confidence: 99%

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NONDESTRUCTIVE EVALUATION OF CERAMIC COMPONENTS BY Γ-Ray CT

Rokugawa

Usui

Aecl³

1992

Nondestructive Testing and Evaluation

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Some results of y-ray Computed Tomography (CT) examination of ceramic parts in various stages of the manufacturing process are presented in this paper. The ceramic samples were prepared by injection molding and examined in three stages: after injection-molding, after sintering and after HIPing. cr tests were performed at AECL Research, Chalk River Laboratories. The uniformity of the material distribution in ceramic parts was measured by measuring density gradients in CT images, with an accuracy between 0.2% and 0.5% in various scans. The results demonstrate that the cr technique is very useful, particularly for monitoring changes in material distribution during various stages of the fabrication process and for providing comparisons between technologically different processes.

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Section: Experimental Procedure: Ceramic Preparationmentioning

confidence: 99%