Results 91 to 100 of about 24,708 (261)

Thermodynamics of iron oxide gas-solid reduction based on the minimized Gibbs free energy principle

工程科学学报, 2017
A thermodynamic model for gas-solid reduction reactions of iron oxides was established based on the minimized Gibbs free energy principle. On the basis of the model calculation results, the equilibrium diagram for the gas-solid reduction reactions of ...
LI Bin, GUO Han-jie, GUO Jing, SUN Guan-yong   +3 more
doaj   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

The Irony of Iron – Biogenic Iron Oxides as an Iron Source to the Ocean [PDF]

Frontiers in Microbiology, 2016
Primary productivity in at least a third of the sunlit open ocean is thought to be iron-limited. Primary sources of dissolved iron (dFe) to the ocean are hydrothermal venting, flux from the sediments along continental margins, and airborne dust. This article provides a general review of sources of hydrothermal and sedimentary iron to the ocean, and ...
openaire   +3 more sources

Understanding the Stochastic Nature of Process Parameter Development of Blown Powder Laser Beam Directed Energy Deposition Additive Manufacturing of Pure Molybdenum

Advanced Engineering Materials, EarlyView.
Identified through the use of statistical design of experiments and metallographic investigation, this study exposes the stochastic origins of intergranular cracks in blown powder laser beam directed energy deposition additive manufacturing of pure molybdenum. It further demonstrates a successful crack mitigation approach with direct correlation to the
Nathaniel J. Lies, Daniel E. Driemeyer, Aaron P. Stebner   +2 more
wiley   +1 more source

Implementation of a method to determine sub-nanomolar concentrations of iron in seawater and its application to the study of marine iron biogeochemistry at the ocean-shelf interface [PDF]

, 2006
The aim of this study was to improve our understanding of the marine iron cycle using a newly implemented technique to measure dissolved iron in seawater.
Nedelec, F., Nedelec, Florence
core  

Catalytic Mechanism Studies of Ortho–para H2 Conversion Over Iron Oxide Catalysts

EcoEnergy
Hydrogen serves as an ideal clean energy with zero carbon emissions, whereas its large‐scale application relies on its liquidation, by which the catalytic conversion of ortho–para H2 at cryogenic temperature is inevitable with iron oxides as a promising ...
Yusen Chen, Hongying Zhuo, Zheng Shen, Nan Yin, Zhongzheng Zhao, Binglian Liang, Guodong Liu, Xuning Li, Xiaofeng Yang, Yanqiang Huang   +9 more
doaj   +1 more source

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source

Towards a mechanistic understanding of carbon stabilization in manganese oxides [PDF]

, 2015
Minerals stabilize organic carbon (OC) in sediments, thereby directly affecting global climate at multiple scales, but how they do it is far from understood.
Gray, N, Johnson, K.L., Purvis, G, Wagner, T, Lopez-Capel, E, Greenwell, C., Wagner, T., Peacock, C, Bowen, L, Finlay, N.C., Lopez-Capel, E., Worrall, F., Worrall, F, Ojeda, J., Bowen, L., März, C., Greenwell, C, Robertson, S.R., Peacock, C.L., Johnson, K, Peacock, CL, Jesus Ojeda Ledo, Worral, F, Ojeda, J, Finlay, N, Gray, N.D., Purvis, G., Robertson, S, März, C   +28 more
core   +1 more source

Effects of Different Parent Materials and Toposequence on status and distribution of Iron Oxides in Some Soils of Sulaymaniyah Governorate / Iraq

The Iraqi Journal of Agricultural science
Three transects were chosen in Sulaymaniyah governorate / Iraq. The first was located within the Bazian Plain, while the second was in Sulaymaniyah plain, and the third was located within the plain of Shahrazur, in order to study the effect of parent ...
Somaya Alobaidy, Salman Essa
doaj   +1 more source

Microstructure‐Controlled Crack Propagation and Fracture Resistance in MoSiBTiC Alloy Revealed by Multiscale Extended Finite Element Method Modeling

Advanced Engineering Materials, EarlyView.
A two‐dimensional multiscale finite element analysis framework was established for the first‐generation MoSiBTiC alloy, and the mechanical and fracture‐related parameters of the constituent phases were calibrated through experiments and simulations. The framework provides a basis for analyzing crack propagation behavior in its complex microstructure ...
Junfeng Du, Takahiro Kaneko, Xinyu Yan, Takahito Ohmura, Kyosuke Yoshimi   +4 more
wiley   +1 more source