Effect of micro/nano TiO2 addition on the densification behavior and mechanical properties of multifunctional resistant porcelains

2021 ◽  
Author(s):  
Maryam Esmaili ◽  
Mohammad Reza Nilforoushan ◽  
Morteza Tayebi ◽  
Ermia Aghaie
Keyword(s):  
Mechanical Properties ◽  
Densification Behavior ◽  
Nano Tio2 ◽  
Tio2 Addition

Tribological Behaviour of Alumina Ceramics with Nano TiO2 as a sintering aid in Non-Conformal Contact

2021 ◽  
pp. 1-21
Author(s):  
Partha Haldar ◽  
Tapas Kumar Bhattacharya ◽  
Nipu Modak
Keyword(s):  
Mechanical Properties ◽  
Secondary Phase ◽  
Alumina Ceramics ◽  
Alumina Matrix ◽  
Tribological Behaviour ◽  
Nano Tio2 ◽  
Sintering Aid ◽  
Tio2 Addition ◽  
Sintering Behaviour ◽  
Hexagonal Columnar

Abstract The study emphasized the sintering behaviour and tribo-mechanical properties of alumina ceramics by nano TiO2 addition as a sintering aid. With increase in sintering temperature, the bulk density of alumina has increased gradually and optimized at 1600°C. The optimizing effect of densification at 1600°C is 98.25% by the addition of 1 wt.% nano TiO2. The maximum solid solubility of titania in alumina grains was at 1600°C, causes optimisation of densification by 1 wt. % addition. The excess addition of TiO2 formed low dense Al2TiO5, appear as a secondary phase at grain boundaries and does not significantly improved densification. Fracture toughness increases and coefficient of friction decreases with the addition of nano TiO2 in alumina matrix. The 1wt.% nano TiO2 addition improved hardness to 8.82% and reduces specific wear rate to 45.56%. The 1wt.% nano TiO2 addition greatly influenced the microstructure of sintered Al2O3. The morphology was sharply changed from hexagonal columnar shape to order sub round orientation which also directly impact the tribo-mechanical properties of sintered alumina. The 1wt.% addition substantially decreases wear track depth as observed by 3D surface profilometer. Microscopic observation of the worn-out surface showed that wearing is majorly caused by plastic deformation and abrasion.

Development Of Flax Fibre Reinforced Epoxy Composite With Nano Tio2 Addition Into Matrix To Enhance Mechanical Properties

2018 ◽  
Vol 5 (5) ◽  
pp. 11569-11575 ◽  
Author(s):  
Vishnu Prasad ◽  
Deepak suresh ◽  
M.A. Joseph ◽  
K. Sekar ◽  
Mubarak Ali
Keyword(s):  
Mechanical Properties ◽  
Epoxy Composite ◽  
Flax Fibre ◽  
Nano Tio2 ◽  
Tio2 Addition

scholarly journals Effect of High Pressure Treatment on Poly(lactic acid)/Nano–TiO2 Composite Films

Molecules ◽  
2018 ◽  
Vol 23 (10) ◽  
pp. 2621 ◽  
Author(s):  
Hai Chi ◽  
Wenhui Li ◽  
Chunli Fan ◽  
Cheng Zhang ◽  
Lin Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Lactic Acid ◽  
Composite Film ◽  
Composite Films ◽  
Barrier Properties ◽  
Poly Lactic Acid ◽  
Pressure Treatment ◽  
Nano Tio2 ◽  
High Pressure Treatment

The microstructure, thermal properties, mechanical properties and oxygen and water vapor barrier properties of a poly(lactic acid) (PLA)/nano-TiO2 composite film before and after high pressure treatment were studied. Structural analysis showed that the functional group structure of the high pressure treated composite film did not change. It was found that the high pressure treatment did not form new chemical bonds between the nanoparticles and the PLA. The micro-section of the composite film after high pressure treatment became very rough, and the structure was depressed. Through the analysis of thermal and mechanical properties, high pressure treatment can not only increase the strength and stiffness of the composite film, but also increase the crystallinity of the composite film. Through the analysis of barrier properties, it is found that the barrier properties of composite films after high pressure treatment were been improved by the applied high pressure treatment.

Effects of TiO2 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina ceramic composite

2015 ◽  
Vol 41 (3) ◽  
pp. 3961-3967 ◽  
Author(s):  
Hanisah Manshor ◽  
Suriyana Md Aris ◽  
Ahmad Zahirani Ahmad Azhar ◽  
Ezzat Chan Abdullah ◽  
Zainal Arifin Ahmad
Keyword(s):  
Mechanical Properties ◽  
Ceramic Composite ◽  
Alumina Ceramic ◽  
Tio2 Addition ◽  
Zirconia Toughened Alumina

Microwave Sintering of Alumina-Silicon Carbide Nanocomposites

2007 ◽  
Vol 336-338 ◽  
pp. 1072-1075 ◽  
Author(s):  
Kaleem Ahmad ◽  
Wei Pan ◽  
Wen Jie Si
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Silicon Carbide ◽  
Microwave Sintering ◽  
Thermal Runaway ◽  
Surface Heating ◽  
Densification Behavior

Densification behavior, microstructural developments and mechanical properties of 5 wt% SiC nano particulate toughened Al2O3 composites were prepared by using microwave sintering at different sintering temperatures. Densities of up to 97.5% of the theoretical value were achieved at temperature as low as 1380°C. Improvements in fracture toughness and bending strengths are of the order of 99% theoretical dense conventionally sintered composites. Surface heating was observed at the final stages of densification. No thermal runaway was observed in the nanocomposites due to presence of SiC spheroids.

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