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Yinghao Sun and Frank Cheng
Hydrogen embrittlement (HE) of steel pipelines in high-pressure gaseous environments is a potential threat to the pipeline integrity. The occurrence of gaseous HE is subjected to associative adsorption of hydrogen molecules (H2) at specific ?active sites...
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Nora M. Albqmi and Sivasankaran Sivanandam
The principal objective of the study is to examine the impact of thermal radiation and entropy generation on the magnetohydrodynamic hybrid nano-fluid, Al2O3/H2O, flow in a Darcy?Forchheimer porous medium with variable heat flux when subjected to an elec...
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Aleksey V. Zhuzhgov, Lyubov A. Isupova, Evgeny A. Suprun and Aleksandr S. Gorkusha
This study revealed an increased reactivity of centrifugally thermoactivated products of gibbsite toward aqueous solutions of nickel nitrate at room temperature as well as under hydrothermal conditions. X-ray, thermal, microscopy, adsorption and chemical...
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Zhixin Jia, Kaiyue Zhang and Jin Wang
Diamond wire sawing is one of the most widely used methods of cutting Al2O3 ceramic because it has good machining accuracy and causes less surface damage. However, its material removal rate (MRR) needs to be improved with the increasing demand for Al2O3 ...
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Mohamed Ismail Moustafa
One of the most extensively studied topics in dozens of studies is the alteration process of ilmenite, the formation of leucoxene, and the presence of some impurity oxides: SiO2 and Al2O3. The altered Egyptian black sand ilmenite grains of relatively low...
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Shangye Chu, Xu Zeng, Hai Lin and Yuting Zhu
The performance of catalytic wet oxidation of excess activated sludge derived from pharmaceutical wastewater treatment over a Cu/?-Al2O3 catalyst was investigated. The experiments were performed with a stainless steel autoclave reactor by using the prepa...
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Ghasem Azimiroeen, Seyed Farshid Kashani-Bozorg, Martin Nosko and Saeid Lotfian
Friction stir processing (FSP) offers a unique opportunity to tailor the microstructure and improve the mechanical properties due to the combination of extensive strains, high temperatures, and high-strain rates inherent to the process. Reactive friction...
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Adrian Parzybut, Pawel Surmacz and Zbigniew Gut
This study investigates the use of MnxOy/Al2O3 and Pt/Al2O3 catalysts for the decomposition of hydrogen peroxide in thrusters. It describes the purpose, procedures, performance, and conclusions coming from the test campaign of the catalyst lifetimes. In ...
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Fernando Guillermo Sardi,Márcia Elisa Boscato Gomes,Silvana Elizabeth Marangone
Pág. 150 - 161
The Reflejos de Mar Li-pegmatite, located in northwestern Argentina, is part of the Villismán pegmatite group, Ancasti District, Pampean Pegmatite Province. Four garnet crystals from the outermost part of the pegmatite were analyzed by major and minor el...
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Huaying Wu, Zhongcheng Jiang, Qibo Huang, Funing Lan, Hongwei Liao, Tengfang Li and Chenhui Huang
The chemical weathering of carbonate rocks is the main form of interaction between earth spheres in the karst critical zone. The karst weathering cover, which is composed by residua from carbonate rocks weathering, contains important information about th...
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