Tribological Properties of MoS2 with Different Morphologies in High-Density Polyethylene

2012 ◽  
Vol 47 (1) ◽  
pp. 79-90 ◽  
Author(s):  
Kun Hong Hu ◽  
Xian Guo Hu ◽  
Jin Wang ◽  
Yu Fu Xu ◽  
Cheng Liang Han
Keyword(s):  
Tribological Properties ◽  
High Density Polyethylene ◽  
High Density

Relation between Microstructure and Tribological Properties of High Density Polyethylene Hybrid Composites Filled with Untreated Glass Spheres, Talc and Calcium Carbonate

2013 ◽  
Vol 592-593 ◽  
pp. 655-659
Author(s):  
Münir Taşdemir
Keyword(s):  
Wear Rate ◽  
Tribological Properties ◽  
High Density Polyethylene ◽  
Elasticity Modulus ◽  
Filler Content ◽  
Hybrid Composites ◽  
High Density ◽  
Structure And Properties ◽  
Glass Spheres ◽  
High Level

In the present work, high density polyethylene based composites filled with glass spheres, talc and calcite particles were prepared. Fillers contents in the HDPE were 5, 10, 15, and 20 wt%. The mechanical, morphological and tribological properties of the polymer composites were investigated. Substantial improvements in the some mechanical properties were obtained by the addition of filler. For example, the results showed that the elasticity modulus of composites improved with increasing the filler content. The addition of fillers to the HDPE changed significantly the friction coefficient and wear rate of the composites. HDPE filled with a high level content of fillers showed higher wear rate than pure HDPE under dry sliding. The structure and properties of the composites are characterized using a scanning electron microscopy (SEM).

Tribological Behavior of High Density Polyethylene Nanocomposites With Silane Treated Carbon Nanofibers

2011 ◽  
Author(s):  
Songbo Xu ◽  
Aydar Akchurin ◽  
X. W. Tangpong ◽  
Iskander S. Akhatov ◽  
Tian Liu ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Tribological Properties ◽  
High Density Polyethylene ◽  
High Density ◽  
Micro Hardness ◽  
Melt Mixing ◽  
Silane Coating ◽  
Pin On Disc ◽  
Treated Carbon ◽  
New Applications

New applications of carbon-based materials have been continuously developed in recent years. Carbon Nanofibers (CNFs) with silane coatings were added into high density polyethylene (HDPE) to improve the tribological properties of the nanocomposite material for biomedical applications. The nanocomposites were fabricated with various weight percentages of carbon nanofibers (0.5%, 1%, 3%) that were treated with different silane coating thicknesses (2.8nm, 46nm) through melt-mixing and compressive processing. The wear and friction tests were performed on a pin-on-disc tribometer under phosphate buffered saline lubricated condition. Compared with the pure HDPE, the friction coefficients of the nanocomposites were reduced dramatically and their wear resistance properties were also improved. Micro-hardness measurements of the nanocomposites were carried out and CNFs were found to be capable of improving the material’s micro-hardness effectively. The effects of concentration and silane coating thickness of CNFs on the tribological properties of the resulting nanocomposites were analyzed and the wear mechanism of the CNF/HDPE nanocomposites was discussed.

Tribological modification of high-density polyethylene by using carbon soot from diesel combustion

2016 ◽  
Vol 68 (5) ◽  
pp. 603-610 ◽  
Author(s):  
X.A. Cao ◽  
G.Q. Shao ◽  
K.H. Hu
Keyword(s):  
Abrasive Wear ◽  
Amorphous Carbon ◽  
Tribological Properties ◽  
High Density Polyethylene ◽  
Friction Pair ◽  
High Density ◽  
Exhaust Emission ◽  
Content Type ◽  
Transmission Electron ◽  
Carbon Soot

Purpose The purpose of this paper is to explore the tribological properties of high-density polyethylene (HDPE) modified by carbon soot from the combustion of No. 0 diesel. Design/methodology/approach Carbon soot is characterized using X-ray diffraction, transmission electron microscopy and scanning electronic microscopy. The tribological properties of HDPE samples with carbon soot are investigated on a materials surface tester with a ball-on-disk friction pair. Findings The collected carbon soot mainly comprises amorphous carbon nanoparticles of 50-100 nm in diameter. The main wear behaviours of pure HDPE include abrasive wear and plastic deformation. After adding carbon soot nanoparticles to HDPE, HDPE wear decreases. The appropriate carbon soot content is 8 per cent in HDPE under the selected testing conditions. Compared with other HDPE samples, HDPE with 8 per cent carbon soot has higher melting temperature, lower abrasive wear and better wear resistance. The lubrication of HDPE with carbon soot is due to the formation of a transferring film composed of HDPE, amorphous carbon and graphite carbon. Originality/value The paper reveals the HDPE modification and lubrication mechanisms by using carbon soot from the combustion of diesel. Related research can perhaps provide a potential approach for the treatment of carbon soot exhaust emission.

scholarly journals The Influence of Deformation under Tension on Some Mechanical and Tribological Properties of High-Density Polyethylene

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1429 ◽  
Author(s):  
Maciej Kujawa ◽  
Piotr Kowalewski ◽  
Wojciech Wieleba
Keyword(s):  
Free Energy ◽  
Surface Free Energy ◽  
Polymeric Material ◽  
Tribological Properties ◽  
High Density Polyethylene ◽  
High Density ◽  
Polymer Materials ◽  
Surface Appearance ◽  
Wear Process ◽  
Mechanical And Tribological Properties

Polymer materials are increasingly being used for sliding machine elements due to their numerous advantages. They are used even where they are deformed and in such a state that they interact frictionally, e.g., in machine hydraulics or lip seals. Few publications deal with the influence of deformation, which is the effect of, e.g., assembly on tribological properties of polymeric material. This deformation can reach up to ε ≈ 20% and is achieved without increasing the temperature of the polymer material. The paper presents the results of investigations in which high-density polyethylene (PE-HD) was maintained in deformation by means of a special grip (holder). The wear of the sample was significantly higher than that of the undeformed sample. This effect persisted even after partial relaxation of the stress in the sample after 24 h. Additional investigations were carried out to explain the obtained results. There were the microscopic observations of the surface after friction, measurements of microhardness, and surface free energy. Changes in the value of surface free energy and a significant decrease in microhardness with deformation under tension were observed. Deformed materials have a different surface appearance after friction and a different size and form of wear products. It was indicated that it is probable that the cohesion of the material will decrease and that the character of the wear process will change as a result of tension. Deformation under tension without heating of polymeric material (PE-HD), e.g., as a result of assembly, has been qualified as a threat to be taken into account when designing and analysing polymeric sliding elements.

scholarly journals The Influence of Deformation under Tension on Some Mechanical and Tribological Properties of High-Density Polyethylene

2019 ◽  
Author(s):  
Maciej Kujawa ◽  
Piotr Kowalewski ◽  
Wojciech Wieleba
Keyword(s):  
Polymeric Material ◽  
Tribological Properties ◽  
High Density Polyethylene ◽  
High Density ◽  
Polymer Materials ◽  
Surface Appearance ◽  
Wear Process ◽  
Mechanical And Tribological Properties ◽  
Lip Seals ◽  
Friction Measurements

Polymer materials are increasingly being used for sliding machine elements due to their numerous advantages. They are used even where they are deformed and in such a state they interact frictionally e.g. in machine hydraulics or lip seals. Few publications deal with the influence of deformation, which is the effect of e.g. assembly on tribological properties of polymeric material. This deformation can reach up to ε ≈ 20% and is achieved without increasing the temperature of the polymer material. The paper presents the results of investigations in which high-density polyethylene (PE-HD) was maintained in deformation by means of a special grip (holder). The wear of the sample was significantly higher than that of the undeformed sample. This effect persisted even after partial relaxation of the stress in the sample after 24 hours. Additional investigations were carried out to explain the obtained results. There were the microscopic observations of the surface after friction, measurements of microhardness and free surface energy. Changes in the value of surface free energy and a significant decrease in microhardness with deformation under tension were observed. Strained material had a different surface appearance after friction and a different size and form of wear products. It was indicated that it is probable that the cohesion of the material will decrease and that the character of the wear process will change as a result of tension. Tension without heating of polymeric material (PE-HD), e.g. as a result of assembly, has been qualified as a hazard to be taken into account when designing and analysing polymeric sliding elements.

Sign in / Sign up

Export Citation Format

Share Document