Oxidation characteristics of electrodeposited nickel–zirconia composites at high temperature

2006 ◽  
Vol 96 (2-3) ◽  
pp. 321-325 ◽  
Author(s):  
G.N.K. Ramesh Bapu ◽  
Sobha Jayakrishnan
Keyword(s):  
High Temperature ◽  
Zirconia Composites ◽  
Oxidation Characteristics ◽  
Electrodeposited Nickel

Oxidation characteristics of Fe22Cr5Al3Mo-xNb alloys in high temperature steam

2021 ◽  
pp. 109722
Author(s):  
Wenhuai Zhang ◽  
Yue Qian ◽  
Rongrong Sun ◽  
Xiaodong Lin ◽  
Meiyi Yao ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxidation Characteristics ◽  
High Temperature Steam

scholarly journals Thermomechanical Characterisation of Mullite Zirconia Composites Sintered from Andalusite for High Temperature Applications

Ceramics ◽  
2019 ◽  
Vol 2 (4) ◽  
pp. 587-601 ◽  
Author(s):  
Thierry Chotard ◽  
Lizeth Arbelaez Morales ◽  
Marie-Laure Bouchetou ◽  
Jacques Poirier
Keyword(s):  
Acoustic Emission ◽  
High Temperature ◽  
Thermal Shock ◽  
Amorphous Phase ◽  
Important Influence ◽  
X Ray Diffraction ◽  
Bending Tests ◽  
Thermomechanical Behaviour ◽  
Zirconia Composites ◽  
Ultrasonic Techniques

Mullite-Zirconia refractories are well known for their good resistance to corrosion and thermal shock. In this study, several mullite-zirconia composites were developed from andalusite, alumina and zircon sintered at 1600 °C for 10 hours. The samples were subjected to thermal shock carried out after heating at 1200 °C, in order to study the mechanical and thermomechanical behaviour as a function of the amount of zirconia dispersed in the mullite matrix. It appears that that the amorphous phase (SiO2), determined by X-ray diffraction, produced by the decomposition of andalusite, increases considerably with the amount of final zirconia in the composite and has a very important influence on the porosity. This amorphous phase seems also to have an important influence on the mechanical properties of the material. The characterisation of the thermomechanical behaviour (elastic properties and damage monitoring) was carried out thanks to ultrasonic techniques (US echography and Acoustic Emission). The “surprising” evolution (increase) of the Young’s modulus E of the material after being submitted to repeated thermal shocks is highlighted and explained. The acoustic emission technique carried out at high temperature and also coupled to 4-points bending tests (at room temperature) demonstrates its effectiveness for providing a better understanding of the chronology of the involved mechanisms involved at microstructural scale.

High Temperature Oxidation of Ti45.4Al4.8Nb and Ti46Al2Mo2Nb Alloys

2005 ◽  
Vol 475-479 ◽  
pp. 801-804
Author(s):  
J.W. Kim ◽  
Dong Bok Lee
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Middle Layer ◽  
Tio2 Layer ◽  
Temperature Oxidation ◽  
Outward Diffusion ◽  
Oxidation Characteristics ◽  
Dissolved Ions

The Ti46Al2Nb2Mo and Ti45.4Al4.8Nb alloys were oxidized isothermally and cyclically in air between 800 and 1000oC, and their oxidation characteristics were investigated. Nb and Mo were beneficial to oxidation resistance. The initially formed thin TiO2-rich scale changed to an outer, superficial TiO2 layer, a thick Al2O3-rich middle layer, and an inner (TiO2-rich, Al2O3-deficient) layer, as the extent of oxidation progressed. The dissolved ions of Mo and Nb had a tendency to be expelled from the outer TiO2 layer, which was formed by the outward diffusion of Ti ions, to the inner (TiO2-rich, Al2O3-deficient) layer, which was formed by the inward transport of oxygen, owing to the nobility of Mo and Nb when compared to Ti and Al.

High temperature mechanical properties of reaction-sintered mullite/zirconia and mullite/alumina/zirconia composites

1985 ◽  
Vol 20 (7) ◽  
pp. 2533-2540 ◽  
Author(s):  
G. Orange ◽  
G. Fantozzi ◽  
F. Cambier ◽  
C. Leblud ◽  
M. R. Anseau ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
High Temperature Mechanical Properties ◽  
Zirconia Composites

High temperature deformation of spinel–zirconia composites

2007 ◽  
Vol 33 (6) ◽  
pp. 1057-1063 ◽  
Author(s):  
A. Addad ◽  
F. Béclin ◽  
J. Crampon ◽  
R. Duclos
Keyword(s):  
High Temperature ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Zirconia Composites
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