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eBook Chapter
... ASTM D7542 provides a standardized way to measure the oxidation mass loss rates of graphite in air within a temperature range where chemical kinetics are assumed to dominate. This test was primarily designed to discriminate between graphite candidates for high-temperature gas-cooled reactors...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7529-7
... The oxidation of zirconium cladding alloys used in nuclear reactors was investigated under the conditions of loss-of-coolant and severe accidents, i.e., at temperatures between 600 and 1600°C and in various atmospheres. The kinetics were parabolic or sub-parabolic as long as the superficially...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2008
ISBN-10: 0-8031-3421-5
ISBN: 978-0-8031-3421-8
... and transmutation in structural materials in fusion and accelerator-driven reactors. The long time evolution of the extrinsic gas atoms and their accumulation at vacancies is studied using a kinetic Monte Carlo algorithm that is parameterized by the migration energies of the point defect entities. First-order...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2007
ISBN-10: 0-8031-5616-2
ISBN: 978-0-8031-5616-6
... heat release kinetics combustion oxygen consumption calorimetry Journal of ASTM International, April 2006, Vol. 3, No. 4 Paper ID JAI13895 Available online at www.astm.org Richard E. Lyon,1 Richard N. Walters,2 and Stanislav I. Stoliarov2 A Thermal Analysis Method for Measuring Polymer...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2005
ISBN-10: 0-8031-3493-2
ISBN: 978-0-8031-0756-4
... into account to improve the thermodynamic description of the ZrNbFe phase diagram. Also, the influence of preliminary cold work on the precipitation kinetics of equilibrium β Nb phase has been investigated. This study was conducted on two Zr-1% Nb alloys containing initially metastable β Zr precipitates...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2003
ISBN-10: 0-8031-3469-X
ISBN: 978-0-8031-3469-0
... A mathematical model based upon the theory of total cumulative damage has been developed to describe the kinetics of thermal aging in roofing material subjected to changing temperatures and durations. The new model employs a degradation rate function that is derived from a chemical model using...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2001
ISBN-10: 0-8031-2887-8
ISBN: 978-0-8031-2887-3
... Flynn and Dickens demonstrated in 1976 that continuous kinetic information may be derived from thermogravimetry profiles using a periodic temperature square wave signal. Blaine extended this approach to the sine wave. Extension of the sine wave approach to differential scanning calorimetry...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2876-2
ISBN: 978-0-8031-2876-7
... This study compared the effects of several variables with respect to measurement of kinetic data collected during alpine skiing. The Novel Pedar System, a portable, in-shoe, pressure distribution measurement system, was used to directly collect field data. One subject with prior experience...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2499-6
ISBN: 978-0-8031-2499-8
... an extensive study of the phase transformation kinetics and the development of a new test facility, EDGAR-2, to perform thermomechanical tests. The first part of the paper deals with an experimental study and modeling of the α↔β phase transformation kinetics. High-temperature/high-sensitivity calorimeter...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2601-8
ISBN: 978-0-8031-2601-5
... Most users of polymeric materials have a good sense that the glass transition event is kinetic in nature, i.e., it depends on cooling or heating rate in conventional experiments, and that the glassy state is a non-equilibrium state. However, it is often not appreciated that the structural...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2007-9
ISBN: 978-0-8031-2007-5
..., a formulation study was undertaken to characterize the degradation kinetics of two averraectins; emamectin benzoate, and abamectin, in the presence of potential photostabilizers. Interestingly, the use of PABA (p-aminobenzoic acid) in this study did not show the stabilizing effect that was expected from...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2035-4
ISBN: 978-0-8031-2035-8
... Avermectins are fermentation products with unique insecticidal properties which are useful in crop protection, animal health and human health. In this study, the degradation kinetics of MK-0244, a potent lepidoptericidal avermectin, were examined over a range of temperatures in selected solvents...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1473-7
ISBN: 978-0-8031-1473-9
..., Maxwell, and Ladder equivalent circuits. alternating-current impedance alternating-current impedance spectroscopy impedance spectroscopy corrosion kinetics electrode kinetics electrochemistry Earl L. Pye 1 and Kamran Golestaneh 1 Equivalent Electronic Circuits Computer Generated from...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1991
ISBN-10: 0-8031-1417-6
ISBN: 978-0-8031-1417-3
... This paper summarizes the benefits that can be obtained by the use of time temperature indicators (TTI) as monitors of quality in the food distribution chain and the requirements for their successful application. Modeling of the TTI response characteristics based on kinetic principles...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1991
ISBN-10: 0-8031-1422-2
ISBN: 978-0-8031-1422-7
... This study reports the uptake and elimination kinetics, the bioconcentration, and the acute toxicity of a series of chlorinated benzenes and biphenyls in a submerged aquatic macrophyte ( Myriophyllum spicatum ) and in a fish ( Poecilia reticulata ) species. The objective of this study...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1406-0
ISBN: 978-0-8031-1406-7
... corrosion testing. atmospheric corrosion time of wetness sulfation plate classification of atmospheres weathering steel acid precipitation site monitoring chloride candle particulates kinetics Sheldon W. Dean 1 Corrosion Testing of Metals Under Natural Atmospheric Conditions REFERENCE...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-0978-4
ISBN: 978-0-8031-0978-0
... differences observed between lab and site waters were reduced when expressed in terms of mean soluble metal. Additional experiments demonstrated that particulate zinc was not biologically available under test conditions and that soluble zinc may vary in its toxicity. Data also suggest that kinetic factors...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-1177-0
ISBN: 978-0-8031-1177-6
.... The weakness of the classical ASTM method for proximate analysis of coals and its usage in the biomass area are highlighted. When compared to the classical ASTM method, TG provides additional information on the kinetics and reactivity of materials. Methods for utilizing TG data to obtain information...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-1178-9
ISBN: 978-0-8031-1178-3
... in the first excited state, S 1 , than in the ground state, S 0 , and of requiring a concentrated mineral acid medium for protonation. The quantitation of excited-state proton transfer kinetics is presently extended to several protonated N -heterocyclic amines that are weak enough bases in the excited state...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1988
ISBN-10: 0-8031-1167-3
ISBN: 978-0-8031-1167-7
... of dynamic vapor sorption has been developed that accurately reproduces the experimentally observed results. This model divides the adsorbent into regions of different prevailing sorption kinetics. The major region has a sorption rate that is determined solely by mass transport of vapor. The remaining “slow...