scholarly journals Nanoscale Plasticity Behavior of Additive-Manufactured Zirconia-Toughened Alumina Ceramics during Nanoindentation

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 1006 ◽  
Author(s):  
Wenli Li ◽  
Weiwei Liu ◽  
Maoshan Li ◽  
Jianbin Nie ◽  
Yao Chen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Maximum Shear Stress ◽  
Yttria Stabilized Zirconia ◽  
Plastic Behavior ◽  
Alumina Ceramics ◽  
Deformation Bands ◽  
Stabilized Zirconia ◽  
Component Design ◽  
Zirconia Toughened Alumina ◽  
Scanning Electron

The nanoscale plasticity phenomena in zirconia-toughened alumina (ZTA) ceramics with yttria-stabilized zirconia (YSZ) addition of 10% and 30% fabricated by additive manufacturing based on a stereolithography technique were explored in detail by nanoindentation and scanning electron microscopy. It was demonstrated that the initiation of nanoscale plasticity was attributed to the combined contributions from the generation of nanoscale shear deformation bands and localized microcracking at the indentations. Such localized plastic behavior underneath the nanoindenter was interpreted by maximum shear stress analysis. The response of the phase boundary during indentation was emphasized through crack propagation paths, and optimization of alumina–YSZ adaptation through component design and SL processing was expected.

Effect of Coupled Conditions of Thermal Cycle and Dump Environment on Microstructure of 5mol% Yttria Stabilized Zirconia

2013 ◽  
Vol 544 ◽  
pp. 330-333 ◽  
Author(s):  
Jin Feng Xia ◽  
Ge Ming Liu ◽  
Niu Sheng Peng ◽  
Tao Feng ◽  
Hai Fang Xu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Raman Spectroscopy ◽  
Thermal Cycle ◽  
Oxygen Sensor ◽  
Yttria Stabilized Zirconia ◽  
Cyclic Change ◽  
Stabilized Zirconia ◽  
Scanning Electron

In some applications such as automotive oxygen sensor, 5mol% Y2O3stabilized zirconia (5YSZ) is generally used because it has both excellent ionic conductivity and mechanical properties. the automotive oxygen sensor would experience a cyclic change from high temperature (engine running) environment to the lowtemperature damp environment (in the tail pipe when vehicle stops). The microstructures change with coupled conditions of thermal cycle and dump environment in the 5mol%Y2O3–ZrO2 (5YSZ) system was examined by XRD，Raman spectroscopy and scanning electron microscopy (SEM) in this paper.

Analysis of the Y-TZP Ceramic Substucture in Blasting with Aluminum Oxide before and after Sintering

2014 ◽  
Vol 805 ◽  
pp. 576-580
Author(s):  
C.L. Melo-Silva ◽  
C.F. Carvalho ◽  
T.C.F. Melo-Silva ◽  
R.X. Freitas ◽  
F.R.F. Silva ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aluminum Oxide ◽  
Good Alternative ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Resin Cements ◽  
Before And After ◽  
Scanning Electron ◽  
Group 1

The objective of this study was to evaluate the microstructure of a ceramic based on yttria stabilized zirconia (Y-TZP) in blasting with aluminum oxide and its effect on the sintering. 25 pre-sintered Y-TZP blocks were obtained. Ten samples were blasted with alumina, and then all samples were sintered and divided into the groups: Control-no treatment; alumina G1-blasted with alumina and sintered; alumina and Rocatec G1-blasted, sintered, and Rocatec; alumina G2-sintered, alumina blasting; alumina and Rocatec G2-sintering, alumina blasting, and Rocatec. The samples were evaluated by a scanning electron microscopy. The qualitative analysis showed that the treated samples had an increase in the surface texture and that group 1– alumina and Rocatec– presented the silica incorporation to be regular and homogeneous. It was concluded that the treatment of pre-sintered surfaces is a good alternative in the bonding strength between the Y-TZP and the resin cements.

Effect of Coupled Conditions of Thermal Cycle and Dump Environment on Conductivity of 5mol% Yttria Stabilized Zirconia

2013 ◽  
Vol 591 ◽  
pp. 245-248 ◽  
Author(s):  
Jin Feng Xia ◽  
Hong Qiang Nian ◽  
Tao Feng ◽  
Hai Fang Xu ◽  
Dan Yu Jiang
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
High Temperature ◽  
Thermal Cycle ◽  
Oxygen Sensor ◽  
Yttria Stabilized Zirconia ◽  
Cyclic Change ◽  
Stabilized Zirconia ◽  
Transmission Electron

In some applications such as automotive oxygen sensor, 5mol% Y2O3stabilized zirconia (5YSZ) is generally used because it has both excellent ionic conductivity and mechanical properties. The automotive oxygen sensor would experience a cyclic change from high temperature (engine running) environment to the low temperature damp environment (in the tail pipe when vehicle stops). The conductivity change with coupled conditions of thermal cycle and dump environment in the 5mol%Y2O3ZrO2(5YSZ) system was examined by XRD,Impedance spectroscopy and transmission electron microscopy (SEM) in this paper.

Study on Alumina Ceramics for Dechlorinating Reactor Lining

2008 ◽  
Vol 368-372 ◽  
pp. 707-709
Author(s):  
Shi Gang Long ◽  
Feng Cao ◽  
Liu Heng Sun ◽  
Qing Min Meng
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Spectral Analysis ◽  
Thermal Shock ◽  
Energy Dispersive ◽  
Alumina Ceramics ◽  
Sintering Conditions ◽  
Sintering Condition ◽  
Scanning Electron

Al2O3 ceramics samples were prepared by changing the ingredient and sintering conditions. The resistance experiment of the Al2O3 ceramics to hydrochloride corrosion and thermal shock were carried out, and then identified by means of scanning electron microscopy and energy dispersive spectral analysis. The results indicated the optimal Al2O3 and sintering condition for the dechlorinating reactor.

EPITAXIAL GROWTH OF YTTRIA-STABILIZED ZIRCONIA FILMS ON SILICON BY R.F. MAGNETRON SPUTTERING

1991 ◽  
Vol 05 (27) ◽  
pp. 1829-1835 ◽  
Author(s):  
Q.X. SU ◽  
L. LI ◽  
Y.Y. ZHAO ◽  
Y.Z. ZHANG ◽  
P. XU
Keyword(s):  
Magnetron Sputtering ◽  
Yttria Stabilized Zirconia ◽  
Processing Conditions ◽  
Full Width ◽  
X Ray Diffraction ◽  
Stabilized Zirconia ◽  
X Ray ◽  
Si Substrates ◽  
Zirconia Films ◽  
Scanning Electron

Yttria-stabilized Zirconia(YSZ) films were deposited on (100)Si substrates by R.F. magnetron sputtering method. X-ray diffraction analysis showed that the best YSZ films were cubic in structure and was grown epitaxially with (100) orientation. The (200) peak of YSZ films was 0.8° of the full width at half of the maximum, X-ray diffraction based on Seemann-Bohlin focusing geometry showed no peaks. The morphology of the YSZ films was observed by scanning electron microscopy. The effects of the processing conditions (such as substrate temperature, oxygen partial pressure, etc.) on the structure of the film were also discussed.

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