Chemical stability of �pan carbon fiber plastic in various media

1986 ◽  
Vol 22 (7) ◽  
pp. 341-344
Author(s):  
I. S. Revenkova ◽  
A. V. Goryainova ◽  
L. L. Loichuk
Keyword(s):  
Carbon Fiber ◽  
Chemical Stability ◽  
Fiber Plastic ◽  
Carbon Fiber Plastic

Strength of a cross-reinforced carbon-fiber plastic under impact loads

1984 ◽  
Vol 16 (8) ◽  
pp. 1087-1091
Author(s):  
K. K. Dudka ◽  
I. N. Preobrazhenskii
Keyword(s):  
Carbon Fiber ◽  
Impact Loads ◽  
Fiber Plastic ◽  
Carbon Fiber Plastic

scholarly journals Influence of the structure and thermomechanical properties of oriented carbon plastics on their tribotechnical characteristics

2021 ◽  
Vol 3 (12 (111)) ◽  
pp. 48-58
Author(s):  
Aleksandr Dykha ◽  
Olga Drobot ◽  
Viktor Oleksandrenko ◽  
Svitlana Pidhaichuk ◽  
Pavlo Yaroshenko ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Carbon Fiber ◽  
Microstructural Analysis ◽  
Operating Conditions ◽  
Carbon Plastic ◽  
Friction Units ◽  
Carbon Plastics ◽  
Fiber Plastic ◽  
Plastic Metal ◽  
Carbon Fiber Plastic

It has been established that carbon plastics are increasingly used in various industries as structural materials. By the set of their properties, carbon plastics outperform steel, cast iron, alloys of non-ferrous metals. However, the application of these materials for parts of machine friction units is still limited due to the difficult operating conditions of modern tribosystems. This work aims to conduct a comprehensive experimental study of the tribological properties of materials in the tribosystem "carbon plastic-metal" taking into consideration their structure, as well as the mechanical-thermal characteristics. Comparative tests of the dependence of the friction coefficient on load for metal and polymeric anti-friction materials have shown a decrease in the friction coefficient for plastics by 3...4 times (textolite, carbotextolite, and carbon-fiber plastics). The influence of the filler orientation relative to the slip plane on the anti-friction properties of carbon-fiber plastics was investigated; it was found that the direction of fiber reinforcement in parallel to the friction area ensures less carbon-fiber plastic wear. A linear dependence of the wear intensity of carbon-fiber plastics, reinforced with graphite fibers, on the heat capacity and energy intensity of the mated steel surface has been established. Based on the microstructural analysis, a layered mechanism of the surface destruction of carbon-fiber plastics was established caused by the rupture of bonds between the fiber parts, taking into consideration the direction of the fibers' location to the friction surface. The results reported here could provide practical recommendations in order to select the composition and structure of materials for the tribosystem "carbon-fiber plastic-metal" to be used in machine friction units based on the criterion of improved wear resistance

scholarly journals Amorphous hydrogenated carbon films deposited by a closed-drift ion source

2003 ◽  
Vol 21 (2) ◽  
pp. 285-289 ◽  
Author(s):  
SERGEI P. BUGAEV ◽  
HUI-GON CHUN ◽  
NIKOLAY S. SOCHUGOV ◽  
KONSTANTIN V. OSKOMOV ◽  
ALEXANDER N. ZAKHAROV
Keyword(s):  
Carbon Fiber ◽  
Operation Mode ◽  
High Hardness ◽  
Carbon Films ◽  
Ion Source ◽  
Large Area ◽  
Fiber Plastic ◽  
Source Operation ◽  
Amorphous Hydrogenated Carbon ◽  
Carbon Fiber Plastic

The general possibility of the extended (∼30 cm) closed-drift ion source application for deposition of wear-resistant amorphous hydrogenated carbon (a-C:H) films on large-area dielectric substrates, in particular, on carbon-fiber plastic, is shown. Parameters of the “ion” and the “plasma” regimes of the ion source operation in argon and methane are defined. It is shown that the ion current nonuniformity is in the range of ±5–15% depending on the operation mode. Optimum conditions for the substrate precleaning in argon and hard, well-adhered a-C:H films deposition from methane are determined. The films are characterized by high hardness (∼11 GPa) and low surface roughness (∼0.13 nm) that leads to a several times lower friction coefficient (0.05) and wear rate (0.001 μm3m−1N−1) compared to glass and carbon-fiber plastic substrates.

scholarly journals Using PyC modified 3D carbon fiber to reinforce UHTC under low temperature sintering without pressure

2021 ◽  
Author(s):  
Baihe Du ◽  
Yuan Cheng ◽  
Liancai Xun ◽  
Shuchang Zhang ◽  
Jing Tong ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbon Fiber ◽  
Low Temperature ◽  
Thermal Shock ◽  
Oxide Layer ◽  
Chemical Stability ◽  
Interface Layer ◽  
Ceramic Composites ◽  
Low Temperature Sintering ◽  
Physical And Chemical

AbstractFinding the optimum balance between strength and toughness, as well as acquiring reliable thermal shock resistance and oxidation resistance, has always been the most concerned topic in the discussion of ultra-high temperature ceramic composites. Herein, PyC modified 3D carbon fiber is used to reinforce ultra-high temperature ceramic (UHTC). The macroscopic block composite with large size is successfully fabricated through low temperature sintering at 1300 °C without pressure. The prepared PyC modified 3D Cf/ZrC-SiC composites simultaneously possess excellent physical and chemical stability under the synergistic effect of PyC interface layer and low temperature sintering without pressure. The fracture toughness is increased in magnitude to 13.05 ± 1.72 MPa·m1/2 accompanied by reliable flexural strength of 251 ± 27 MPa. After rapid thermal shock spanning from room temperature (RT) to 1200 °C, there are no visible surface penetrating cracks, spalling, or structural fragmentation. The maximum critical temperature difference reaches 875 °C, which is nearly three times higher than that of traditional monolithic ceramics. The haunting puzzle of intrinsic brittleness and low damage tolerance are resolved fundamentally. Under the protection of PyC interface layer, the carbon fibers around oxide layer and matrix remain structure intact after static oxidation at 1500 °C for 30 min. The oxide layer has reliable physical and chemical stability and resists the erosion from fierce oxidizing atmosphere, ensuring the excellent oxidation resistance of the composites. In a sense, the present work provides promising universality in designability and achievement of 3D carbon fiber reinforced ceramic composites.

Theoretical Assessment Of The Bearing Capacity Of A Steel Beam Reinforced With Carbon Fiber

2020 ◽  
pp. 18-22
Keyword(s):  
Carbon Fiber ◽  
Bearing Capacity ◽  
Adhesive Layer ◽  
Carbon Plastic ◽  
Steel Beams ◽  
Steel Beam ◽  
Fiber Plastic ◽  
Fiber Materials ◽  
Short Time ◽  
Theoretical Assessment

To reinforce steel beams, modern carbon fiber materials that are attached to the beam from the stretched side using a special two-component adhesive can be effectively used. Compared to traditional methods of cross-section increase by means of additional steel elements attached by welding or on bolts, reinforcing with carbon fiber plastic has a number of advantages. Carbon plastic has a much smaller weight than a steel element that has the same load-bearing capacity; the adhesive layer prevents corrosion of the reinforced element; work on strengthening is carried out in a short time and with less labor expenditures etc. The article presents the results of theoretical studies of beams reinforced with carbon fiber lamellas. For the theoretical assessment of the strength of a reinforced steel beam, deformations and stresses in the section at the elastic, elastic-plastic and plastic stages of steel work are considered. It is established that a significant effect of carbon fiber reinforcement is observed even when the stresses in it are determined by the strength of the adhesive joint. Formulas, taking into account the strength of the adhesive layer determined experimentally, for determining the strength of a reinforced beam are obtained. A theoretical model of the operation of bent steel elements is constructed and theoretical dependencies are obtained that can be used for calculations of steel beams reinforced with carbon plastic.

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