Results 71 to 80 of about 136,222 (300)

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

Advanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold, Dylan Jennings, Robert Vaßen   +2 more
wiley   +1 more source

Influence of process parameters on the adsorption properties of zeolite 13X

Journal of Chemists, Technologists and Environmentalists
Zeolite 13X is one of the best adsorbents among zeolites and one of the most commercially available zeolites.  This paper investigates the influence of several process parameters on the properties of 13X zeolite, including crystallization ...
Ognjen Stojkić, Radislav Filipović, Mladen Janković, Duško Kostić, Mitar Perusic, Srećko Stopić, Vladimir Damjanović   +6 more
doaj   +1 more source

OPTIMASI pH ALUMINA dan 99Mo DALAM PEMBUATAN GENERATOR 99Mo/99mTc BERBASIS MoO3 ALAM

Urania, 2018
OPTIMASI pH ALUMINA dan 99Mo DALAM PEMBUATAN GENERATOR 99Mo/99mTc BERBASIS MoO3 ALAM. Alumina sebagai bahan penyerap telah lama digunakan untuk radioisotop 99Mo pada generator 99Mo/99mTc penghasil 99mTc yang banyak digunakan di kedokteran nuklir untuk ...
Sulaiman Sulaiman, Yono Sugiharto, Chairuman Chairuman, Gatot Setiawan, Adang Hardi Gunawan   +4 more
doaj   +1 more source

A novel route for controlling and improving the texture of porous structures through dual growth of alumina nanoparticles and carbon nanotubes using explosion process of solid fuel

Journal of Materials Research and Technology, 2020
Micro- and meso-porous structures of alumina have attracted attention for their potential use in different applications. In this research, a novel and facile route was introduced for dual growth of alumina nanoparticles and carbon nanotubes together to ...
Osama Saber, Abdullah Aljaafari, Adil Alshoaibi, Mohammed Al-Yaari, Mostafa Osama   +4 more
doaj   +1 more source

Performance Analysis of Abradable Coating Systems for Aircraft Gas Turbines

Advanced Engineering Materials, EarlyView.
Three CoNiCrAlY/YSZ/MgAl2O4 abradable liner configurations on a nickel‐superalloy are evaluated by thermal‐gradient cycling and incursion tests. Laser ablation of the bondcoat and/or Y2O3‐stabilized ZrO2 (YSZ) intermediate layer increases mechanical interlocking and bonding for thick topcoats.
Hanna Heyl, Daniel Emil Mack, Martin Tandler, Susanne Schrüfer, Robert Vaßen   +4 more
wiley   +1 more source

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source

The Leachability of Calcium Aluminate Phases in Slags for the Extraction of Alumina [PDF]

, 2017
Alumina is used primarily as feedstock for aluminum production. It occurs naturally in bauxite and clay and other minerals, and can be concentrated in industrial by-products such as coal gangue, fly ash, blast furnace slag, etc.
Azof, Fabian Imanasa, Safarian, Jafar, Kolbeinsen, Leiv   +2 more
core   +1 more source

Mechanistic Study of the Influence of Reactant Type and Addition Sequence on the Microscopic Morphology of α-Al₂O₃

Applied Sciences
To perform an in-depth study of the crystal growth habits and phase changes of alumina and its precursors in reaction systems, this paper studied the effects of reactant type and addition order on the morphology of alumina using hydrothermal methods with
Weixiang Wen, Yang Bai, Mengxu Xu, Yujuan Gao, Pingke Yan, Huabing Xu   +5 more
doaj   +1 more source

Affecting the Properties of Copper–Graphene Electroconductive Composite by Severe Plastic Deformation

Advanced Engineering Materials, EarlyView.
Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich, Lenka Kunčická, Pavel Czernek, Zifan Wang   +3 more
wiley   +1 more source

Controlled porosity alumina structures for ultra-precision hydrostatic journal bearings [PDF]

, 2010
A series of fine-grade alumina powders has been used in combination with maize starch granules to produce porous structures for porous hydrostatic journal- bearing applications. A comprehensive series of tests was conducted to characterize porosity in
John Corbett, Corbett, John, Durazo-Cardenas, Isidro, David J. Stephenson, Isidro S. Durazo-Cardenas, Stephenson, David J., Stephenson, D. J.   +6 more
core   +1 more source