Covalently Attached Organic Monolayers onto Silicon Carbide from 1-Alkynes: Molecular Structure and Tribological Properties

Langmuir ◽  
2013 ◽  
Vol 29 (12) ◽  
pp. 4019-4031 ◽  
Author(s):  
Sidharam P. Pujari ◽  
Luc Scheres ◽  
Tobias Weidner ◽  
Joe E. Baio ◽  
Martien A. Cohen Stuart ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Silicon Carbide ◽  
Tribological Properties ◽  
Organic Monolayers

Microwave-Assisted Formation of Organic Monolayers from 1-Alkenes on Silicon Carbide

Langmuir ◽  
2014 ◽  
Vol 30 (35) ◽  
pp. 10562-10565 ◽  
Author(s):  
Sebastiaan A. van den Berg ◽  
Jose Maria Alonso ◽  
Kuldeep Wadhwa ◽  
Maurice C. R. Franssen ◽  
Tom Wennekes ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Organic Monolayers ◽  
Microwave Assisted

scholarly journals Investigation of graphite effect on the mechanical and tribological properties of Al 7075-SiC-graphite hybrid metal matrix composites

2020 ◽  
Vol 37 (1−2) ◽  
Author(s):  
SRIDHAR ATLA ◽  
Prasanna Lakshmi Kaujala
Keyword(s):  
Silicon Carbide ◽  
Powder Metallurgy ◽  
Tribological Properties ◽  
Metal Matrix ◽  
Ceramic Composites ◽  
Wear Behaviour ◽  
Wear Loss ◽  
Mechanical And Tribological Properties ◽  
Al 7075 ◽  
Pin On Disc

The aluminium metal matrix composite reinforced with ceramic material of Silicon carbide (SiC) has good mechanical properties. However, aluminium based ceramic composites require improvements in their lubrication and tribological properties. In this study an attempt is made in the development of a new material through powder metallurgy technique by the addition of Graphite, which acts as a solid lubricant. This work investigated the influence of graphite on the wear behaviour of Al 7075/SiC /X wt.% graphite(X=0, 5 and 10) hybrid composite. The investigation reveals the effectiveness of incorporation of graphite in the composite for gaining wear reduction. The Al 7075 (aluminium alloy 7075) reinforced with SiC –graphite were investigated. The composites were fabricated using powder metallurgy route. The microstructures, material combination, wear and friction properties were analysed by scanning electron microscopy, XRD, and pin-on-disc wear tester. The newly developed aluminium composite has significant improvements in tribological properties with a combination of 5% Silicon carbide (SiC) and 5% Graphite. The test reveals that sliding distance of 1000 m and sliding speed of 1.5 m/s with applied load of 5 N result in minimum wear loss of 0.01062g and coefficient of friction as 0.1278.

Low-friction mechanism of silicon carbide and cemented carbide in water

2020 ◽  
pp. 135065012092868
Author(s):  
Fei Guo ◽  
Fan Wu ◽  
Fangyong Wu ◽  
Yuming Wang
Keyword(s):  
Silicon Carbide ◽  
Tribological Properties ◽  
Rotation Speed ◽  
Hydrodynamic Lubrication ◽  
Cemented Carbide ◽  
Matched Pairs ◽  
Low Friction ◽  
Friction Mechanism ◽  
Friction Coefficients ◽  
Test Conditions

The tribological properties of self-mated silicon carbide, self-mated cemented carbide, and cemented carbide/silicon carbide under water lubrication were studied. The three matched pairs could achieve low-friction coefficients (0.01–0.03) under certain test conditions. Additionally, the dependence of the friction coefficients on the rotation speed and load were measured. By combining these results with the observed surface topography and wear measurements, it was determined that the three matched pairs were in the hydrodynamic lubrication. In addition, combined with experiments in ethylene glycol and PAO40, it was shown that the actual viscosity of the lubricant had a significant influence on the realization of low friction. Furthermore, matching materials had an influence on the tribological properties, which may be related to the surface wettability of the lubricant.

Tribology of Ultra-Thin Polymer Films Covalently Bonded to Silicon Surface: Effect of Molecular Structure

2007 ◽  
Author(s):  
N. Satyanarayana ◽  
S. K. Sinha
Keyword(s):  
Molecular Structure ◽  
Tribological Properties ◽  
Polymer Films ◽  
Surface Effect ◽  
Linear Chain ◽  
Primary Objective ◽  
Water Contact ◽  
Force Microscopy ◽  
Angle Measurements ◽  
Sliding Test

The primary objective of the present study is to investigate the influence of the molecular structure (linear or with bulky side groups) of polymer films (of few nanometers thickness) covalently attached to Si surface on tribological properties. PE (polyethylene) and PS (Polystyrene) were selected to test the objective where PE has simple linear molecular structure while PS also has linear molecular structure but contains bulky benzene groups located at the side of the linear chain. PE and PS contains maleic anhydride groups and are chemisorbed onto the APTMS (3-aminopropyltrimethoxysilane) modified Si surface. AFM (atomic force microscopy), XPS (X-ray photoelectron microscopy) and water contact angle measurements are used to identify and characterize the polymer films. A micro-tribometer is used to identify the tribological properties in a sliding test using 4 mm diameter Si3N4 ball as the counterface. PE film has shown very low coefficient of friction and high wear durability when compared to PS film and moreover PS film did not show any improvement in the tribological properties when compared to bare Si surface. This study proves that even in film form polymer with linear molecular structure without the bulky side groups show good tribological properties and hence such polymers can be used as thin-films for reducing friction and wear of substrates, Si or other materials. The chemisorbed PE film may be able to find applications in micro-components made from Si surface as anti-stiction and anti-wear coating.

The Correlation Between Molecular Structure and Tribological Properties of Graphene Oxide with Different Oxidation Degree

2019 ◽  
Vol 67 (3) ◽  
Author(s):  
Lei Zhao ◽  
Hongmei Yang ◽  
Chang Liu ◽  
Shaoqing Xue ◽  
Zhao Deng ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Graphene Oxide ◽  
Tribological Properties ◽  
Oxidation Degree

Synthesis and tribological properties of hexagonal titanium silicon carbide crystals

2011 ◽  
Vol 46 (2) ◽  
pp. 178-182
Author(s):  
Qiong Wu ◽  
Hua Tang ◽  
Changsheng Li ◽  
Xiaofei Yang ◽  
Haojie Song ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Tribological Properties ◽  
Titanium Silicon Carbide ◽  
Titanium Silicon

scholarly journals Influence of Molecular Structure of Anionic Polymer Dispersants on Dense Silicon Carbide Suspension Behavior and Microstructures of Green Bodies Prepared by Slip Casting

2003 ◽  
Vol 111 (1293) ◽  
pp. 327-332 ◽  
Author(s):  
Masahiro NOJIRI ◽  
Hajime HASEGAWA ◽  
Takuro ONO ◽  
Toshio KAKUI ◽  
Mayumi TSUKADA ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Silicon Carbide ◽  
Slip Casting ◽  
Anionic Polymer
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