Results 41 to 50 of about 164,402 (291)

Enthalpy of formation of phosphorus pentachloride; derivation of the enthalpy of formation of aqueous orthophosphoric acid

Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1974
When chlorine (real gas, 980 mmHg) combines with white (α) phosphorus to form phosphorus pentachloride at 24.89 °C, 3986.3 ± 2.7 J of heat are liberated per gram of stoichiometrically equivalent Mg2P2O7. This value was determined by a dead-ended flow system in an electrically calibrated isoperibol calorimeter.
R H, Schumm, E J, Prosen, D D, Wagman
openaire   +2 more sources

Alkaloids and Selected Topics in Their Thermochemistry

Molecules, 2021
Alkaloid chemistry is varied and complex. Many alkaloids attract a great deal of interest because of their physiological activity, yet surprisingly little is known about the thermochemistry of these compounds, especially in the gas phase.
Maja Ponikvar-Svet, Diana N. Zeiger, Joel F. Liebman   +2 more
doaj   +1 more source

Coarse-grained description of localized inelastic deformation in amorphous metals [PDF]

, 2009
The sequence of shear transformation events that lead to a shear band transition in amorphous metals is described by a spatially random coarse-grained model calibrated to obey the thermodynamic scaling relations that govern flow in a real glass.
Konrad Samwer, Landau L. D., Marios D. Demetriou, William L. Johnson   +3 more
core   +1 more source

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez, Alejandro F. Manchón‐Gordón, Antonio Vidal‐Crespo, Rafael Caballero‐Flores, Jhon J. Ipus, Clara F. Conde   +5 more
wiley   +1 more source

Criteria of predicting phase formation for MSi2-Type High-Entropy refractory metal silicides

Materials & Design, 2023
MSi2-type high-entropy refractory metal silicides (HERMS) have excellent oxidation resistance at medium and high temperatures due to high entropy effect, which is a promising ultrahigh temperature structural material.
Laiqi Zhang, Huicong Li, Zepeng Xiao
doaj   +1 more source

Characterization of Pd/Y multilayers with B4C barrier layers using GIXR and x-ray standing wave enhanced HAXPES [PDF]

, 2018
Pd/Y multilayers are high reflectance mirrors designed to work in the 7.5-11 nm wavelength range. Samples, prepared by magnetron sputtering, are deposited with or without B4C barrier layers located at the interfaces of Pd and Y layers to reduce ...
Giglia, A., Guen, K. Le, Huang, Q. S., Ilakovac, V., Jonnard, P., Li, B. X., Rueff, J. P., Wang, Z. S., Wu, M. Y.   +8 more
core   +2 more sources

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Enthalpy of Formation of Phosphorus Oxide [PDF]

Nature, 1963
THE thermochemical literature contains a single value1 for the standard enthalpy of formation ΔHf° P4O6(c) of −540 kcal/mole. This value was obtained by an indirect route involving accurate measurements of the heat of combustion of red phosphorus in nitric oxide.
S. B. HARTLEY, J. C. McCOUBREY
openaire   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

Advanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios, Anthony Gonzalez, Aleksander Aleman, Tyler Dolmetsch, Tanaji Paul, Arvind Agarwal   +5 more
wiley   +1 more source

Thermodynamic Properties of Two Cinnamate Derivatives with Flavor and Fragrance Features

Liquids
The standard molar enthalpies of formation in the liquid phase for ethyl (E)-cinnamate and ethyl hydrocinnamate, two cinnamate derivatives with notable flavor and fragrance characteristics, were determined experimentally using combustion calorimetry in ...
Vera L. S. Freitas, Carlos A. O. Silva, Maria D. M. C. Ribeiro da Silva   +2 more
doaj   +1 more source