scholarly journals How and Why Alumina Matrix Architecture Influence the Shape and Composition of Nanowires Grown by AC Deposition?

10.5772/52589 ◽  
2012 ◽  
Author(s):  
Arunas Jagminas
Keyword(s):  
Alumina Matrix

ALUMINA MATRIX WITH CONTROLLED MORPHOLOGY FOR COLORED SPECTRALLY SELECTIVE COATINGS

2017 ◽  
Vol 16 (3) ◽  
pp. 715-724 ◽  
Author(s):  
Luminita Isac ◽  
Lavinia Nicoara ◽  
Ramona Panait ◽  
Alexandru Enesca ◽  
Dana Perniu ◽  
...  
Keyword(s):  
Alumina Matrix ◽  
Spectrally Selective ◽  
Controlled Morphology

Pressureless sintering of alumina matrix ceramic materials improved by Al–Ti–B master alloys and diopside

2009 ◽  
Vol 35 (4) ◽  
pp. 1327-1333 ◽  
Author(s):  
Changxia Liu ◽  
Junlong Sun ◽  
Xihua Zhang ◽  
Yongbiao Ma ◽  
Ning Qi
Keyword(s):  
Ceramic Materials ◽  
Pressureless Sintering ◽  
Alumina Matrix ◽  
Master Alloys

Comparative Analysis of Fracture Toughness Obtained by Different Techniques in Alumina Matrix - Dispersed TZP Zirconia Composites

2016 ◽  
Vol 869 ◽  
pp. 46-51
Author(s):  
Daniel Alessander Nono ◽  
Eron Fernandes da Silva ◽  
Maria do Carmo de Andrade Nono ◽  
Francisco Piorino Neto ◽  
Sergio Luiz Mineiro
Keyword(s):  
Fracture Toughness ◽  
Tetragonal Zirconia ◽  
Ceramic Composites ◽  
Alumina Matrix ◽  
Single Edge ◽  
Chemical Inertness ◽  
Edge Notch ◽  
Properties Of Materials ◽  
Experimental Values ◽  
Benefit Cost

The fracture toughness is one of the requirements for mechanical properties of materials for use in satellites. The ceramic TZP zirconia (tetragonal zirconia polycrystals) have been investigated for applications in ballistic armor. Due to the chemical inertness and fracture toughness, this material has the potential to act as a screen against impacts of micrometeorites and space debris. The ceramic composites of alumina-zirconia 3Y-TZP (tetragonal zirconia polycrystals doped with 3 mol% ytria ) are the materials with the best benefit / cost for this application. This paper presents and discusses the results obtained from the use of two techniques for determining fracture toughness. The composite alumina - 18.5% of 3Y-TZP zirconia nanoparticles obtained from deflocculated powders have been tested for Vickers and the SEVNB penetration method (Single-Edge-Notch Beam V) to obtain the fracture toughness values (KIC). The KIC values obtained were analyzed due to the lower dispersion of experimental values. The SEVNB method showed better reliability in determining the toughness values in the studied ceramics.

Silver Nanoparticles with an Armor Layer Embedded in the Alumina Matrix To Form Nanocermet Thin Films with Sound Thermal Stability

2014 ◽  
Vol 6 (14) ◽  
pp. 11550-11557 ◽  
Author(s):  
Junhua Gao ◽  
Chengjun Tu ◽  
Lingyan Liang ◽  
Hongliang Zhang ◽  
Fei Zhuge ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Silver Nanoparticles ◽  
Alumina Matrix

The use of fluorinated alumina as a support of the sulfated zirconia catalyst for isomerization of hexane

2021 ◽  
Vol 21 (3) ◽  
pp. 170-176
Author(s):  
M. D. Smolikov ◽  
O. V. Dzhikiya ◽  
L. I. Bikmetova ◽  
K. V. Kazantsev ◽  
I. V. Muromtsev ◽  
...  
Keyword(s):  
Sulfated Zirconia ◽  
Hydrofluoric Acid ◽  
Fluorine Doping ◽  
Alumina Matrix ◽  
Zirconia Catalyst ◽  
Sulfated Zirconia Catalyst ◽  
Fluorinated Alumina ◽  
Sulfated Zirconia Catalysts ◽  
Al2o3 Matrix ◽  
High Octane

The study considers the effect of fluorine doping of the alumina matrix used for the synthesis of supported sulfated zirconia catalysts. Hydrofluoric acid served as a fluorinating agent. The addition of fluorine was shown to affect the textural characteristics of the Al2O3 matrix and hence the surface area of sulfated zirconia catalysts based on the doped systems. It was found that the introduction of fluorine into the catalysts increases their activity (the conversion of hexane) and the yield of high-octane isomer 2,2-dimethylbutane.

Residual stresses in Al2O3/Y-TZP Ceramic Laminates Fabricated by Tape and Slip Casting

2008 ◽  
Vol 571-572 ◽  
pp. 327-332 ◽  
Author(s):  
Jesus Ruiz-Hervias ◽  
Giovanni Bruno ◽  
Jonas Gurauskis ◽  
A.J. Sanchez-Herencia ◽  
C. Baudin
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Residual Stresses ◽  
Volume Fraction ◽  
Tape Casting ◽  
Slip Casting ◽  
Ceramic Composites ◽  
Processing Route ◽  
Alumina Matrix ◽  
Stress Profiles

Residual stress profiles were measured by neutron diffraction in Al2O3/Y-TZP ceramic composites containing 5 and 40 vol.% Y-TZP fabricated by conventional slip casting and by a novel tape casting route. Residual stresses in the zirconia are tensile and increase as its volume fraction decreases. For the alumina matrix, residual stress is compressive and increases with the zirconia volume fraction. In the composite with 5 vol.% zirconia, the processing route does not have an influence on residual stresses. However, in the composite with 40 vol.% zirconia, residual stresses are different in the samples obtained by both processing routes.

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