About pycnometric density measurements

Viana, Marylène; Jouannin, P; Pontier, Catherine; Chulia, Dominique

doi:10.1016/s0039-9140(02)00058-9

Cited by 111 publications

(79 citation statements)

References 5 publications

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“…[8][9][10] Helium pycnometry measures the skeletal volume of the samples by determining the difference in helium pressure between an empty chamber with a calibrated volume and the chamber containing a sample. 16 The last, and most advanced, method used on CPCs is MIP, which measures pressure differences during intrusion of mercury into the pores. 17 From this method not only the total porosity can be achieved, but also the size distribution of the pore interconnections.…”

Section: Theorymentioning

confidence: 99%

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An evaluation of methods to determine the porosity of calcium phosphate cements

Unosson

Persson

Engqvist

2014

J. Biomed. Mater. Res.

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The porosity of a material can be determined using a diversity of methods; however, the results from these methods have so far not been compared and analyzed for calcium phosphate cements (CPCs). The aim of this study was to compare a fast and easy method for porosity measurements with some commonly used porosity methods for CPCs. The investigated method is based on the assumption that when a wet cement sample is dried, the volume of the evaporated water is equal to the volume of pores within the cement. Moreover, different methods of drying the cements were evaluated for acidic CPCs. The results showed that drying at room temperature (22 6 1 C) is preferable, since a phase transformation was observed at higher temperatures. The results also showed that drying for 24 h in vacuum was sufficient to achieve water-free cements. The porosity measured was found to vary between the porosity methods evaluated herein, and to get a complete picture of a cement's porosity more than one method is recommended. Water evaporation, is, however, a fast and easy method to estimate the porosity of CPCs and could simplify porosity measurements in the future.

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Section: Theorymentioning

confidence: 99%

“…The density of the actual bulk material can in theory be calculated using molecular weight and crystalline lattice parameters received from X-ray diffraction (XRD) measurements. 16 However, XRD calculations do not take into account any amorphous phases that can be present in the sample and might therefore overestimate the skeletal density.…”

Section: Theorymentioning

confidence: 99%

An evaluation of methods to determine the porosity of calcium phosphate cements

Unosson

Persson

Engqvist

2014

J. Biomed. Mater. Res.

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“…Performance of the machine is related to sample quantity and cell size. The accuracy of the porosity measurements of the machine falls between 0.02 vol% and 0.1 vol% (Viana et al, 2002). Helium is used as specific gas as its small radius of the atoms are assumed to percolate the sample 35 volume until the smallest pore sizes (1 nm).…”

Section: Helium Pycnometry (=He-pycnometry)mentioning

confidence: 99%

Multiscale porosity estimates along the pro-and retrograde deformation path: an example from Alpine slates

Akker¹,

Kaufmann²,

Desbois³

et al. 2018

Preprint

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Abstract. Estimating porosity of slates is of great interest for the recently rising industries dealing with the underground such as CO2 sequestration, nuclear waste disposal and shale gas but also for engineering purposes in 15 terms of mechanical stability for underground or surface constructions. In this study, we aim understanding Additionally, porosity and pore morphology are strongly dependent on mineralogy, sample homogeneity and 30 strain.

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“…The density of the CNF was determined by pycnometry [28] in an AccuPyc 1330. The equipment was calibrated with a standard volume.…”

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confidence: 99%

Thermomechanical properties of copper–carbon nanofibre composites prepared by spark plasma sintering and hot pressing

Ullbrand

Córdoba

Tamayo-Ariztondo

et al. 2010

Composites Science and Technology

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Several types of carbon nanofibres (CNF) were coated with a uniform and dense copper layer by electroless copper deposition. The coated fibres were then sintered by two different methods, spark plasma sintering (SPS) and hot pressing (HP). The Cu coating thickness was varied so that different volume fraction of fibres was achieved in the produced composites. In some cases, the CNF were pre-coated with Cr for the improvement the Cu adhesion on CNF. The results show that the dispersion of the CNF into the Cu matrix is independent of the sintering method used. On the contrary, the dispersion is directly related to the efficiency of the Cu coating, which is tightly connected to the CNF type. Overall, strong variations of the thermal conductivity (TC) of the composites were observed (20-200 W/mK) as a function of CNF type, CNF volume fraction and Cr content, while the coefficient of thermal expansion (CTE) in all cases was found to be considerably lower than Cu (9.9-11.3 ppm/K). The results show a good potential for SPS to be used to process this type of materials, since the SPS samples show better properties than HP samples even though they have a higher porosity, in applications where moderate TC and low CTE are required.

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About pycnometric density measurements

Cited by 111 publications

References 5 publications

An evaluation of methods to determine the porosity of calcium phosphate cements

An evaluation of methods to determine the porosity of calcium phosphate cements

Multiscale porosity estimates along the pro-and retrograde deformation path: an example from Alpine slates

Thermomechanical properties of copper–carbon nanofibre composites prepared by spark plasma sintering and hot pressing

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