Spectroscopic properties of all-ceramic composite with layer-by-layer of Nd:Y/sub 3/Al/sub 5/O/sub 12/ and Nd:Y/sub 3/ScAl/sub 4/O/sub 12/

2005 ◽  
Author(s):  
Y. Sato ◽  
T. Taira ◽  
A. Ikesue
Keyword(s):  
Ceramic Composite ◽  
Spectroscopic Properties ◽  
Layer By Layer ◽  
All Ceramic

All-ceramic composite with layer-by-layer structure by advanced ceramic technology

2005 ◽  
Author(s):  
Kunio Yoshida ◽  
Hirokazu Ishii ◽  
Takahiro Kumada ◽  
Tomosumi Kamimura ◽  
Akio Ikesue ◽  
...  
Keyword(s):  
Ceramic Composite ◽  
Layer Structure ◽  
Ceramic Technology ◽  
Layer By Layer ◽  
Advanced Ceramic ◽  
All Ceramic

Exceptional hydrogen permeation of all-ceramic composite robust membranes based on BaCe0.65Zr0.20Y0.15O3−δ and Y- or Gd-doped ceria

2015 ◽  
Vol 8 (12) ◽  
pp. 3675-3686 ◽  
Author(s):  
Elena Rebollo ◽  
Cecilia Mortalò ◽  
Sonia Escolástico ◽  
Stefano Boldrini ◽  
Simona Barison ◽  
...  
Keyword(s):  
Ceramic Composite ◽  
Hydrogen Permeation ◽  
Ceramic Composites ◽  
Hydrogen Separation ◽  
Doped Ceria ◽  
Separation Membranes ◽  
All Ceramic

Mixed proton and electron conductor ceramic composites were examined as hydrogen separation membranes at moderate temperatures (higher than 500 °C).

scholarly journals Fracture load of nano-ceramic composite material for anterior endocrown restorations

2020 ◽  
Vol 23 (1) ◽  
Author(s):  
Salma Alghalayini ◽  
Kamal Khaled Ebeid ◽  
Ayman Aldahrab ◽  
Marwa Wahsh
Keyword(s):  
Ceramic Composite ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Cyclic Fatigue ◽  
Fracture Load ◽  
Endodontically Treated Teeth ◽  
Ceramic Fracture ◽  
Tooth Structure ◽  
All Ceramic ◽  
Cad Cam

Objective: To evaluate ability of Nano Ceramic Composite endocrown to withstand occlusal forces when used in the anterior region. Material and Methods: Eighty endodontically treated maxillary central incisors teeth were randomly divided into two main groups according to the restoration type.  40 of these teeth were post, core and crown restorations and 40 were endocrown restorations.  Then they were divided by halves into two subgroups according to the material used 20 were made with Lava Ultimate and the other 20 with IPS e.max. Each subgroup was then further subdivided into two divisions according to the remaining tooth structure above the CEJ (n=10): 2 mm and 0.5 mm above the CEJ. After teeth preparation, the restorations were all made by CAD/CAM system (Cerec MCXL). All samples had undergone cyclic fatigue testing, and then loaded to fracture using a universal testing machine. The specimens were measured and statistically analyzed using Mann-Whitney test for comparing the mean changes between the groups. Results:  Lava Ultimate showed higher mean fracture load values than IPS e.max specimens. Conclusion: Endocrowns were found to be more favorable when used on endodontically treated teeth than the conventional post, core and crown restorations.KEYWORDSEndocrowns; All-ceramic; Fracture; Cyclic loading.

3D Liquid Bioprinting of the PCL/β-TCP Scaffolds

2018 ◽  
Vol 923 ◽  
pp. 79-83 ◽  
Author(s):  
Mehmet Onur Aydogdu ◽  
Nazmi Ekren ◽  
Osman Kilic ◽  
Faik Nüzhet Oktar ◽  
Oguzhan Gunduz
Keyword(s):  
Composite Material ◽  
Ceramic Composite ◽  
Solidification Process ◽  
Heating System ◽  
3D Printer ◽  
Layer By Layer ◽  
3D Bioprinting ◽  
Scaffold Material ◽  
Controlled Flow ◽  
The Ideal

In this present work, an original 3D bioprinting method has been developed by modifying an exceptional 3D printer. Using a composite material, bioprinting was carried out to create the ideal scaffold material to contribute regeneration of the certain amount of tissue types in humans. After bypassing the extruder and heating system of the 3D printer, instead of using solid filaments, polymer-ceramic composite was dissolved using an organic agent and bioprinting was conducted. During the bioprinting, dissolving agent was evaporated quickly and solidification process was completed. Despite of the traditional 3D printing, which benefits from the glass transition temperature of the materials, regardless of the temperature, rapid prototyping technology has been merged with controlled flow rate of the composite solution and evaporation of the solvents were adjusted meticulously for proper solidification and layer by layer bioprinting of the scaffolds.

scholarly journals La2O3–Al2O3–SiO2 glass-infiltrated 3Y-TZP all-ceramic composite for the dental restorative application

2012 ◽  
Vol 22 (3) ◽  
pp. 224-230 ◽  
Author(s):  
Shenyong Shi ◽  
Qinghong Zhang ◽  
Hongzhi Wang ◽  
Yaogang Li
Keyword(s):  
Ceramic Composite ◽  
Sio2 Glass ◽  
All Ceramic ◽  
Dental Restorative

scholarly journals Structure and Properties of ZrO2–20%Al2O3 Ceramic Composites Obtained Using Additive Technologies

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2361 ◽  
Author(s):  
Vladimir Promakhov ◽  
Alexander Zhukov ◽  
Yana Dubkova ◽  
Ilya Zhukov ◽  
Sergey Kovalchuk ◽  
...  
Keyword(s):  
Ceramic Composite ◽  
Bending Strength ◽  
Elasticity Modulus ◽  
Ceramic Composites ◽  
Additive Technologies ◽  
Layer By Layer ◽  
Structure And Properties ◽  
Fusion Technology ◽  
Ceramic Injection Molding ◽  
Similar Materials

This investigation focused on obtaining samples from ceramic composite materials, based on the ZrO2–20%Al2O3 system, using the additive layer-by-layer fusion technology for thermoplastic systems. The structure and phase composition of the initial powders were studied, experimental samples were produced, and the structure and properties of the experimental samples that were obtained using additive technologies were analysed. The measured static bending strength of the samples was 450 ± 70 MPa, microhardness was 14 GPa, and the elasticity modulus was 280 ± 25 GPa. The strength of these samples are slightly inferior to that of similar materials, obtained using Ceramic Injection Molding technology because our samples were characterised by the residual porosity of about 15%.

Microstructural characterization of CoPtCr/Cr thin film disks by cross-section TEM and elongated probe micro-diffraction

1991 ◽  
Vol 49 ◽  
pp. 762-763
Author(s):  
M.A. Parker ◽  
K.E. Johnson ◽  
C. Hwang ◽  
A. Bermea
Keyword(s):  
Magnetic Recording ◽  
Electron Probe ◽  
Microstructural Characterization ◽  
Crystallographic Structure ◽  
Recording Media ◽  
Layer By Layer ◽  
Cross Sectional ◽  
New Techniques ◽  
Polished Side

We have reported the dependence of the magnetic and recording properties of CoPtCr recording media on the thickness of the Cr underlayer. It was inferred from XRD data that grain-to-grain epitaxy of the Cr with the CoPtCr was responsible for the interaction observed between these layers. However, no cross-sectional TEM (XTEM) work was performed to confirm this inference. In this paper, we report the application of new techniques for preparing XTEM specimens from actual magnetic recording disks, and for layer-by-layer micro-diffraction with an electron probe elongated parallel to the surface of the deposited structure which elucidate the effect of the crystallographic structure of the Cr on that of the CoPtCr.XTEM specimens were prepared from magnetic recording disks by modifying a technique used to prepare semiconductor specimens. After 3mm disks were prepared per the standard XTEM procedure, these disks were then lapped using a tripod polishing device. A grid with a single 1mmx2mm hole was then glued with M-bond 610 to the polished side of the disk.

HREM interface studies in SiC-whisker-reinforced Al2O3 and Si3N4 ceramics

1988 ◽  
Vol 46 ◽  
pp. 734-735
Author(s):  
W. Braue ◽  
R.W. Carpenter ◽  
D.J. Smith
Keyword(s):  
Analytical Data ◽  
Base Material ◽  
High Strength ◽  
Ceramic Composites ◽  
Good Thermal Stability ◽  
All Ceramic ◽  
Sic Whiskers ◽  
Base Composite ◽  
C 30 ◽  
Si3n4 Ceramics

Whisker and fiber reinforcement has been established as an effective toughening concept for monolithic structural ceramics to overcome limited fracture toughness and brittleness. SiC whiskers in particular combine both high strength and elastic moduli with good thermal stability and are compatible with most oxide and nonoxide matrices. As the major toughening mechanisms - crack branching, deflection and bridging - in SiC whiskenreinforced Al2O3 and Si3N41 are critically dependent on interface properties, a detailed TEM investigation was conducted on whisker/matrix interfaces in these all-ceramic- composites.In this study we present HREM images obtained at 400 kV from β-SiC/α-Al2O3 and β-SiC/β-Si3N4 interfaces, as well as preliminary analytical data. The Al2O3- base composite was hotpressed at 1830 °C/60 MPa in vacuum and the Si3N4-base material at 1725 °C/30 MPa in argon atmosphere, respectively, adding a total of 6 vt.% (Y2O3 + Al2O3) to the latter to promote densification.

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