NDT Characterization of Boron Carbide for Ballistic Applications

Liaptsis, Dimosthenis; Cooper, Ian; Ludford, Nicholas; Gunner, A.; Williams, M.; Willis, David J.; Roberson, C. J.; Falticeanu, Lucian; Brown, Peter M.

doi:10.1002/9780470944004.ch3

Cited by 2 publications

(5 citation statements)

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“…Figure 1a depicts a typical radiographic setup (in place at ANL's X-ray Computed Tomography laboratory) with an example X-ray beam emanating from the X-ray tube (source), passing through the object, and then incident onto the recording medium. According to Beer's law (see above), the intensity of the X-rays incident onto the recording medium is proportional to their number and energy, depends on how much they have been attenuated by the modities and machine components (Ellingson et al, 1997;Liaptsis et al, 2010;Mei et al, 2007;Sun et al, 2008). See Hellier 2012, as well as the journals Research in Nondestructive Evaluation, Nondestructive Testing and Evaluation, and the Journal of Nondestructive Evaluation for an introduction to this materials analytical sub-eld.…”

Section: Basic Principles Of X-radiographic Physicsmentioning

confidence: 99%

The digital radiography of archaeological pottery: Program and protocols for the analysis of production

Greene

Hartley

Dupuy

et al. 2017

Journal of Archaeological Science

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Archaeologists collaborating with material scientists at Argonne National Laboratory (ANL) as part of the Making of Ancient Eurasia (MAE) Project have developed formal methodological standards for the assemblage-based digital radiographic (DR) analysis of archaeological pottery. While analog radiography of pottery (X-radiography, Xeroradiography, etc.) has functioned as a common disciplinary tool for some time, inaccessibility, obsolescence, and signicantly enhanced functionality have made DR instrumentation increasingly attractive and vital. This article presents the theoretical underpinnings, technique development, and resultant protocols that allow digital radiography to analyze very large assemblages and provide quantitative data sets that act as true counterparts to geochemical and mineralogical ones. As a technique of structural pottery evaluation, DR is particularly suited to the analysis of ceramic paste preparation and vessel formation, providing lines of evidence that can esh out neglected portions of the chaîne opératoire, augment existing geochemical or typological classications, and help more deeply characterize various potting traditions. Such datasets are most useful to scholars interested in harnessing the ability of the pottery life cycle to shed light on economic life, learning frameworks, and human social dierences and group identities. The technical capacities and analytical potential of DR are demonstrated through several test analyses of ancient Chinese pottery, to be followed by more extensive case studies in draft. Prospects for closely related, three-dimensional X-ray computed tomographic approaches are also discussed.

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Section: Basic Principles Of X-radiographic Physicsmentioning

confidence: 99%

The digital radiography of archaeological pottery: Program and protocols for the analysis of production

Greene

Hartley

Dupuy

et al. 2017

Journal of Archaeological Science

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“…Further, radiographic testing was also proven not to be sensitive to density variations, whereas ultrasonic techniques were able to determine sensitive density variations. 4 Experimental Procedure…”

Section: Introductionmentioning

confidence: 99%

“…Attempts have been made by several authors to estimate bulk density values of ceramic components. Limited work has been carried out in showing the local density variation across an entire ceramic component, especially in reaction‐formed sintered SiC ceramics.…”

Section: Introductionmentioning

confidence: 99%

“…Several nondestructive testing methods have been studied for measuring density variations in sintered ceramics. These methods include ultrasonic, radiographic, and scanning acoustic microscopy.…”

Section: Introductionmentioning

confidence: 99%

“…The literature includes reports comparing these methods and has proposed that radiographic testing was proven not to be as good as ultrasonic testing. Further, radiographic testing was also proven not to be sensitive to density variations, whereas ultrasonic techniques were able to determine sensitive density variations …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Determination of Density Variation and Microstructure in Reaction‐sintered SiC Ceramics Using Ultrasonic Time‐of‐Flight

Kesharaju

Nagarajah

2013

Int J Applied Ceramic Tech

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Ultrasonic time‐of‐flight (TOF) is investigated as a predictor of density variation across reaction‐sintered silicon carbide (SiC) ceramics. The importance of this research is heightened by the fact that the reaction‐sintered SiC ceramic tiles being investigated are manufactured using the reaction sintering process that involves the infusion of liquid silicon into a porous ceramic preform. This can potentially lead to the formation of islands of free silicon, small closed areas of un‐sintered silicon material as well as conventional porosity. All these defects can result in local variations of density which cannot be detected by conventional bulk density measurement techniques. To study the microstructural differences, the porosity dependence of ultrasonic TOF of the reflected signals was investigated to establish a correlation between the velocity and density across the ceramic tile that aids in characterizing the material. The data suggest that for these ceramic tiles, TOF C‐scan mapping surfs as a much better indicator of sample homogeneity than the amplitude of the back wall echo. At the current time, ceramic tiles are inspected offline and this takes time and effort and is very expensive. In particular, this study contains the procedure followed to establish a quantitative method to quantify density variation across selected ceramic tile.

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NDT Characterization of Boron Carbide for Ballistic Applications

Cited by 2 publications

References 5 publications

The digital radiography of archaeological pottery: Program and protocols for the analysis of production

The digital radiography of archaeological pottery: Program and protocols for the analysis of production

Determination of Density Variation and Microstructure in Reaction‐sintered SiC Ceramics Using Ultrasonic Time‐of‐Flight

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