Influence of loading short carbon fibers (CF) on tribotechnical properties of UHMWPE composites at various testing conditions

2018 ◽  
Author(s):  
S. V. Panin ◽  
V. O. Alexenko ◽  
L. A. Kornienko ◽  
D. G. Buslovich
Keyword(s):  
Carbon Fibers ◽  
Testing Conditions ◽  
Tribotechnical Properties ◽  
Uhmwpe Composites ◽  
Short Carbon

MECHANICAL AND TRIBOTECHNICAL PROPERTIES OF MULTICOMPONENT SOLID LUBRICANT COMPOSITES BASED ON ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE

1970 ◽  
Vol 61 (11) ◽  
Author(s):  
Sergey V. Panin ◽  
Vladislav О. Alexenko ◽  
Lyudmila А. Kornienko ◽  
Dmitry G. Buslovich ◽  
Natalya N. Valentyukevich
Keyword(s):  
Molecular Weight ◽  
Wear Resistance ◽  
High Molecular Weight ◽  
Carbon Fibers ◽  
Friction Surface ◽  
Solid Lubricant ◽  
Permolecular Structure ◽  
Uhmwpe Composites ◽  
Ultra High Molecular Weight ◽  
Short Carbon

Multicomponent composites with ultra-high molecular weight polyethylene (UHMWPE) matrix reinforced by short carbon fibers (CF) and filled with solid lubricant particles of finely dispersed polytetrafluoroethylene (PTFE) have been studied. It is shown that simultaneous loading of two kinds of microfillers (enforcing and solid lubricant) ensures increasing both mechanical properties (elastic modulus, yield point, shore D hardness) and wear resistance of three-component UHMWPE composites at variation of triboloading conditions. It is shown that at moderate sliding velocity (V = 0.3 m/s) and load (P = 60 N) the rational composition providing maximum wear resistance under dry sliding friction is “UHMWPE + 5 wt. % fluorolite + 5 wt. % CF” (wear resistance is doubled). The latter results from the pattern of the formed permolecular structure and friction surface material response onto tribotechnical loading (due to formation of transfer film).Under severe tribotesting conditions (P = 140 N × V = 0.5 m/s) the two-fold increase in wear resistance demonstrates the composite “UHMWPE + 5 wt. % fluorolite + 10 wt. % CF”. This effect is mostly governed by enforcing action of short carbon fibers. The mechanism of this improvement might be explained in the following way. Friction heating induced increase of the temperature gives rise to local melting and surface layer plasticization. Presence of enforcing fibers ensures better protection of the friction surface from combined action of compressive and shear forces transferred from rotating steel counterface. Friction coefficient, topography of wear track surfaces and wear mechanisms of multicomponent UHMWPE composites are discussed taking into account the data on permolecular structure formation and the temperature in the tribocontact zone.  

Morphology and properties of PA6 hybrid composites filled with short carbon fibers and organoclay

2016 ◽  
Vol 2 (3) ◽  
pp. 47-57 ◽  
Author(s):  
S.S. Pesetskii ◽  
S.P. Bogdanovich ◽  
V.V. Dubrovskii ◽  
T.M. Sodyleva ◽  
V.N. Aderikha ◽  
...  
Keyword(s):  
Carbon Fibers ◽  
Hybrid Composites ◽  
Short Carbon

scholarly journals Absorption and Strength Properties of Short Carbon Fiber Reinforced Mortar Composite

Buildings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 300
Author(s):  
Md. Safiuddin ◽  
George Abdel-Sayed ◽  
Nataliya Hearn
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Water Absorption ◽  
Carbon Fibers ◽  
Strength Properties ◽  
Fiber Content ◽  
Test Results ◽  
Air Content ◽  
Entrapped Air ◽  
Short Carbon

This paper presents the water absorption and strength properties of short carbon fiber reinforced mortar (CFRM) composite. Four CFRM composites with 1%, 2%, 3%, and 4% short pitch-based carbon fibers were produced in this study. Normal Portland cement mortar (NCPM) was also prepared for use as the control mortar. The freshly mixed mortar composites were tested for workability, wet density, and entrapped air content. In addition, the hardened mortar composites were examined for compressive strength, splitting tensile strength, flexural strength, and water absorption at the ages of 7 and 28 days. The effects of different carbon fiber contents on the tested properties were observed. Test results showed that the incorporation of carbon fibers decreased the workability and wet density, but increased the entrapped air content in mortar composite. Most interestingly, the compressive strength of CFRM composite increased up to 3% carbon fiber content and then it declined significantly for 4% fiber content, depending on the workability and compaction of the mortar. In contrast, the splitting tensile strength and flexural strength of the CFRM composite increased for all fiber contents due to the greater cracking resistance and improved bond strength of the carbon fibers in the mortar. The presence of short pitch-based carbon fibers significantly strengthened the mortar by bridging the microcracks, resisting the propagation of these minute cracks, and impeding the growth of macrocracks. Furthermore, the water absorption of CFRM composite decreased up to 3% carbon fiber content and then it increased substantially for 4% fiber content, depending on the entrapped air content of the mortar. The overall test results suggest that the mortar with 3% carbon fibers is the optimum CFRM composite based on the tested properties.

Growth mechanism and thermal behavior of electroless Cu plating on short carbon fibers

2021 ◽  
pp. 127294
Author(s):  
Yuan Ma ◽  
Lingjun Guo ◽  
Lehua Qi ◽  
Jia Sun ◽  
Jiancheng Wang ◽  
...  
Keyword(s):  
Thermal Behavior ◽  
Carbon Fibers ◽  
Growth Mechanism ◽  
Short Carbon

scholarly journals Thermo-mechanical behavior of epoxy composite reinforced by carbon and Kevlar fiber

2018 ◽  
Vol 225 ◽  
pp. 01022
Author(s):  
Falak O. Abasi ◽  
Raghad U. Aabass
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Carbon Fibers ◽  
Epoxy Composites ◽  
Fiber Reinforced ◽  
Fiber Loading ◽  
Kevlar Fiber ◽  
Carbon Fiber Reinforced ◽  
Short Carbon

Newer manufacturing techniques were invented and introduced during the last few decades; some of them were increasingly popular due to their enhanced advantages and ease of manufacturing over the conventional processes. Polymer composite material such as glass, carbon and Kevlar fiber reinforced composite are popular in high performance and light weight applications such as aerospace and automobile fields. This research has been done by reinforcing the matrix (epoxy) resin with two kinds of the reinforcement fibers. One weight fractions were used (20%) wt., Epoxy reinforced with chopped carbon fiber and second reinforcement was epoxy reinforced with hybrid reinforcements Kevlar fiber and improved one was the three laminates Kevlar fiber and chopped carbon fibers reinforced epoxy resin. After preparation of composite materials some of the mechanical properties have been studied. Four different fiber loading, i.e., 0 wt. %, 20wt. % CCF, 20wt. % SKF, AND 20wt. %CCF + 20wt. % SKF were taken for evaluating the above said properties. The thermal and mechanical properties, i.e., hardness load, impact strength, flexural strength (bending load), and thermal conductivity are determined to represent the behaviour of composite structures with that of fibers loading. The results show that with the increase in fiber loading the mechanical properties of carbon fiber reinforced epoxy composites increases as compared to short carbon fiber reinforced epoxy composites except in case of hardness, short carbon fiber reinforced composites shows better results. Similarly, flexural strength test, Impact test, and Brinell hardness test the results show the flexural strength, impact strength of the hybrid composites values were increased with existence of Kevlar fibers, while the hardness was decrease. But the reinforcement with carbon fibers increases the hardness and decreases other tests.

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