Preparation and Characterization of Pillared Derivatives from δ-Layered Sodium Disilicate and their Tribological Properties in Liquid Paraffin

2011 ◽  
Vol 48 (1) ◽  
pp. 67-72 ◽  
Author(s):  
Y. Fu ◽  
Y. Wang ◽  
H. Xu ◽  
J. P. Li ◽  
J. X. Dong
Keyword(s):  
Tribological Properties ◽  
Liquid Paraffin ◽  
Sodium Disilicate

Synthesis of α-layered sodium disilicate and its tribological properties in liquid paraffin

2009 ◽  
Vol 19 (37) ◽  
pp. 6896 ◽  
Author(s):  
Hong Xu ◽  
Yajie Wang ◽  
Huafeng Li ◽  
Lei Liu ◽  
Feng Deng ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Liquid Paraffin ◽  
Sodium Disilicate

scholarly journals Preparation and Characterization of Magnetic Chitosan Microcapsules

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Xiaopeng Xiong ◽  
Yong Wang ◽  
Weiwei Zou ◽  
Jiangjiang Duan ◽  
Yun Chen
Keyword(s):  
Magnetic Properties ◽  
Strong Interaction ◽  
Liquid Paraffin ◽  
Hollow Microspheres ◽  
Composite Particles ◽  
Cross Link ◽  
Magnetic Chitosan ◽  
Starting Solution ◽  
Dense Shell

By dispersing aqueous precipitant in liquid paraffin to prepare a W/O emulsion then adding chitosan (CS) solution, CS microcapsules have been successfully prepared. It is a facile way to prepare polymer microcapsules by using aqueous precipitant or nonsolvent as template, which avoids the removal of template and would free from the necessity to cross-link the microcapsule as usual methods to directly form dense shell. The hollow feature of the obtained materials is revealed. The diameter of the microcapsules ranges from severalμm to over 100 μm. Magnetic CS microcapsules have been prepared in this way when Fe3+and Fe2+were mixed with CS to prepare a mixture starting solution. The appearance and microstructure of the composite microcapsules were studied. The results indicate that the formed Fe3O4nanoparticles are embedded in the CS matrix evenly due to strong interaction between the Fe3O4nanoparticles and the CS molecules. The Fe3O4content and the magnetic properties of the composite microcapsule were measured. The composite microcapsules were calcined in air at 700°C to prepare pure inorganic hollow microspheres. It is general to prepare hollow polymeric or composite particles by using this method.

Temperature-Dependent Tribological Improvements in Low-Energy Nitrogen Ion Implanted Vanadium-Titanium Alloys

2005 ◽  
Author(s):  
C. Ballesteros ◽  
J. A. Garci´a ◽  
M. I. Orti´z ◽  
R. Rodri´guez ◽  
M. Varela
Keyword(s):  
Tribological Properties ◽  
Low Energy ◽  
Temperature Dependent ◽  
Structural Modifications ◽  
Nanocomposite Layer ◽  
Implantation Temperature ◽  
Transmission Electron ◽  
Nitrogen Ion ◽  
Tribological Characterization

A detailed tribological characterization of low-energy, nitrogen implanted V5 at. %Ti alloy is presented. Samples were nitrogen-implanted at an accelerating voltage of 1.2 kV and 1 mA/cm2, up to a dose of 1E19 ions/cm2. The tribological properties of the alloys: microhardness, friction coefficient and wear resistance, have improved after ion implantation and this improvement increases as the implantation temperature increases. The microstructure of the alloys were analysed by transmission electron microscopy. A direct correlation between structural modifications of the nitrogen implanted layer and the improvement in their tribological properties is obtained. For samples implanted at 848 K a nanocomposite layer where the reinforcement particles are TiN precipitates forms. TiN precipitation appears as the responsible of the improvement in the tribological properties.

scholarly journals Nano/micro-mechanical and tribological characterization of Ar, C, N, and Ne ion-implanted Si

2010 ◽  
Vol 25 (5) ◽  
pp. 880-889 ◽  
Author(s):  
Zhi-Hui Xu ◽  
Young-Bae Park ◽  
Xiaodong Li
Keyword(s):  
Mechanical Properties ◽  
Tribological Properties ◽  
Crystalline Silicon ◽  
Semiconductor Industry ◽  
Damage Mechanism ◽  
Mechanical And Tribological Properties ◽  
Tribological Characterization ◽  
The Relationship ◽  
Ion Implanted

Ion implantation has been widely used to improve the mechanical and tribological properties of single crystalline silicon, an essential material for the semiconductor industry. In this study, the effects of four different ion implantations, Ar, C, N, and Ne ions, on the mechanical and tribological properties of single crystal Si were investigated at both the nanoscale and the microscale. Nanoindentation and microindentation were used to measure the mechanical properties and fracture toughness of ion-implanted Si. Nano and micro scratch and wear tests were performed to study the tribological behaviors of different ion-implanted Si. The relationship between the mechanical properties and tribological behavior and the damage mechanism of scratch and wear were also discussed.

Tribological properties of Ni3Al–Cr7C3 composite coatings under liquid paraffin lubrication

Wear ◽  
2000 ◽  
Vol 240 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
Peiqing La ◽  
Qunji Xue ◽  
Weimin Liu ◽  
Shengrong Yang
Keyword(s):  
Tribological Properties ◽  
Composite Coatings ◽  
Liquid Paraffin
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