Log in

Relevant bibliographies by topics / CF/PEEK / Journal articles

Journal articles on the topic 'CF/PEEK'

To see the other types of publications on this topic, follow the link: CF/PEEK.

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'CF/PEEK.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Pan, Yusong, Yan Chen, Qianqian Shen, and Chengling Pan. "Effect of carbon fiber surface modification on the flexural mechanical properties of carbon fiber reinforced polyetheretherketone biocomposites." Journal of Polymer Engineering 35, no. 7 (September 1, 2015): 657–63. http://dx.doi.org/10.1515/polyeng-2014-0287.

Full text

Abstract:

Abstract Carbon fiber (CF) reinforced polyetheretherketone (PEEK) is one of the most promising orthopedic implant biomaterials. In this paper, CF reinforced PEEK biocomposites were fabricated by hot press molding technology. The influence of the CF surface modification on the flexural mechanical properties of CF/PEEK biocomposites was investigated. Studies on the flexural mechanical properties of CF/PEEK biocomposites revealed that the flexural stress-strain behavior of the biocomposites possessed linear elastic characteristics. The fracture mechanism of the biocomposites was predominated by brittle rupture. Both flexural strength and modulus of the biocomposites obviously increased with the rise of CF content. The influence degree of different CF modification on the flexural properties of CF/PEEK biocomposites increased with the rise of CF content. Moreover, the CF modified by concentrated HNO3 is beneficial for the flexural strength of the CF/PEEK biocomposites improvement. Conversely, CF modified by KH-560 coupling agent played an adverse influence on the flexural strength of the biocomposites.

APA, Harvard, Vancouver, ISO, and other styles

2

Zhang, Jian Guo, and Chi Lan Cai. "Friction and Wear Properties of Carbon Fiber Reinforced PEEK Composites under Water Lubrication." Applied Mechanics and Materials 66-68 (July 2011): 1051–54. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.1051.

Full text

Abstract:

The present study establishes the relationships between the carbon fibers (CF) content and the trbological properties of Polyether ether ketone (PEEK) composite. PEEK composites such as unreinforced PEEK, reinforced PEEK with different content of carbon fibres were used for the tribological tests. The results indicated that CF/PEEK composite had better tribological properties than pure PEEK. Some CF was ground and squeezed, then mixed with debris on the worn surface, which improved the wear resistance greatly. The low friction coefficient of CF/PEEK composite caused little change in the temperature and further ensured the stable state of sliding.

APA, Harvard, Vancouver, ISO, and other styles

3

Laux, Christoph J., Christina Villefort, Stefanie Ehrbar, Lotte Wilke, Matthias Guckenberger, and Daniel A. Müller. "Carbon Fiber/Polyether Ether Ketone (CF/PEEK) Implants Allow for More Effective Radiation in Long Bones." Materials 13, no. 7 (April 9, 2020): 1754. http://dx.doi.org/10.3390/ma13071754.

Full text

Abstract:

Background: Metallic implants show dose-modulating effects in radiotherapy and complicate its computed tomography (CT)-based planning. Dose deviations might not only affect the surrounding tissues due to backscattering and inadvertent dose increase but might also compromise the therapeutic effect to the target lesion due to beam attenuation. Later on, follow-up imaging is often obscured by metallic artefacts. Purposes: This study investigates the dosimetric impact of titanium and radiolucent carbon fiber/polyether ether ketone (CF/PEEK) implants during adjuvant radiation therapy in long bones. (1) Does the use of CF/PEEK implants allow for a more homogenous application of radiation? (2) Is the dose delivery to the target volume more efficient when using CF/PEEK implants? (3) Do CF/PEEK implants facilitate CT-based radiation therapy planning? Materials and methods: After CT-based planning, bone models of six ovine femora were irradiated within a water phantom in two immersion depths to simulate different soft-tissue envelopes. Plates and intramedullary nails of both titanium and CF/PEEK were investigated. Radiation dosage and distribution patterns were mapped using dosimetry films. Results: First, the planned implant-related beam attenuation was lower for the CF/PEEK plate (1% vs. 5%) and the CF/PEEK nail (2% vs. 9%) than for corresponding titanium implants. Secondly, the effective decrease of radiation dosage behind the implants was noticeably smaller when using CF/PEEK implants. The radiation dose was not significantly affected by the amount of surrounding soft tissues. A significant imaging artefact reduction was seen in all CF/PEEK models. Conclusion: CF/PEEK implants lead to a more reliable and more effective delivery of radiation dose to an osseous target volume. With regard to radiation therapy, the use of CF/PEEK implants appears to be particularly beneficial for intramedullary nails.

APA, Harvard, Vancouver, ISO, and other styles

4

Korycki, Adrian, Christian Garnier, Margot Bonmatin, Elisabeth Laurent, and France Chabert. "Assembling of Carbon Fibre/PEEK Composites: Comparison of Ultrasonic, Induction, and Transmission Laser Welding." Materials 15, no. 18 (September 13, 2022): 6365. http://dx.doi.org/10.3390/ma15186365.

Full text

Abstract:

In the present work, an ultrasonic, an induction, and a through transmission laser welding were compared to join carbon fibre reinforced polyetheretherketone (CF/PEEK) composites. The advantages and drawbacks of each process are discussed, as well as the material properties required to fit each process. CF/PEEK plates were consolidated at 395 °C with an unidirectional sequence and cross-stacking ply orientation. In some configurations, a polyetherimide (PEI) layer or substrate was used. The thermal, mechanical, and optical properties of the materials were measured to highlight the specific properties required for each process. The drying conditions were defined as 150 °C during at least 8 h for PEI and 24 h for CF/PEEK to avoid defects due to water. The optical transmission factor of PEI is above 40% which makes it suitable for through transmission laser welding. The thermal conductivity of CF/PEEK is at most 55 W·(m·K)−1, which allows it to weld by induction without a metallic susceptor. Ultrasonic welding is the most versatile process as it does not necessitate any specific properties. Then, the mechanical resistance of the welds was measured by single lap shear. For CF/PEEK on CF/PEEK, the maximum lap shear strength (LSS) of 28.6 MPa was reached for a joint obtained by ultrasonic welding, while an induction one brought 17.6 MPa. The maximum LSS of 15.2 MPa was obtained for PEI on CF/PEEK assemblies by laser welding. Finally, interfacial resistances were correlated to the fracture modes through observations of the fractured surfaces. CF/PEEK on CF/PEEK joints resulted in mixed cohesive/adhesive failure at the interface and within the inner layers of both substrates. This study presents a guideline to select the suitable welding process when assembling composites for the aerospace industry.

APA, Harvard, Vancouver, ISO, and other styles

5

Adler, Daniel, Michael Akbar, Anna Spicher, Stephanie-Alice Goerke, and Werner Schmoelz. "Biomechanical Study of a Novel, Expandable, Non-Metallic and Radiolucent CF/PEEK Vertebral Body Replacement (VBR)." Materials 12, no. 17 (August 26, 2019): 2732. http://dx.doi.org/10.3390/ma12172732.

Full text

Abstract:

Vertebral body replacement is well-established to stabilize vertebral injuries due to trauma or cancer. Spinal implants are mainly manufactured by metallic alloys; which leads to artifacts in radiological diagnostics; as well as in radiotherapy. The purpose of this study was to evaluate the biomechanical data of a novel carbon fiber reinforced polyetheretherketone (CF/PEEK) vertebral body replacement (VBR). Six thoracolumbar specimens were tested in a six degrees of freedom spine tester. In all tested specimens CF/PEEK pedicle screws were used. Two different rods (CF/PEEK versus titanium) with/without cross connectors and two different VBRs (CF/PEEK prototype versus titanium) were tested. In lateral bending and flexion/extension; range of motion (ROM) was significantly reduced in all instrumented states. In axial rotation; the CF/PEEK combination (rods and VBR) resulted in the highest ROM; whereas titanium rods with titanium VBR resulted in the lowest ROM. Two cross connectors reduced ROM in axial rotation for all instrumentations independently of VBR or rod material. All instrumented states in all planes of motion showed a significantly reduced ROM. No significant differences were detected between the VBR materials in all planes of motion. Less rigid CF/PEEK rods in combination with the CF/PEEK VBR without cross connectors showed the smallest reduction in ROM. Independently of VBR and rod material; two cross connectors significantly reduced ROM in axial rotation. Compared to titanium rods; the use of CF/PEEK rods results in higher ROM. The stiffness of rod material has more influence on the ROM than the stiffness of VBR material.

APA, Harvard, Vancouver, ISO, and other styles

6

Jeon, In Sung, Moon Hyun Lee, Han-Hyeong Choi, Sangwoon Lee, Joon Woo Chon, Dong June Chung, Jong Hyuk Park, and Jae Young Jho. "Mechanical Properties and Bioactivity of Polyetheretherketone/Hydroxyapatite/Carbon Fiber Composite Prepared by the Mechanofusion Process." Polymers 13, no. 12 (June 16, 2021): 1978. http://dx.doi.org/10.3390/polym13121978.

Full text

Abstract:

The main obstacles in the melt-processing of hydroxyapatite (HA) and carbon fiber (CF) reinforced polyetheretherketone (PEEK) composite are the high melting temperature of PEEK, poor dispersion of HA nanofillers, and poor processability due to high filler content. In this study, we prepared PEEK/HA/CF ternary composite using two different non-melt blending methods; suspension blending (SUS) in ethanol and mechanofusion process (MF) in dry condition. We compared the mechanical properties and bioactivity of the composite in a spinal cage application in the orthopedic field. Results showed that the PEEK/HA/CF composite made by the MF method exhibited higher flexural and compressive strengths than the composite prepared by the SUS method due to the enhanced dispersibility of HA nanofiller. On the basis of in vitro cell compatibility and cell attachment tests, PEEK/HA/CF composite by mechanofusion process showed an improvement in in vitro bioactivity and osteo-compatibility.

APA, Harvard, Vancouver, ISO, and other styles

7

Guo, Cheng, Xiaohua Liu, and Guang Liu. "Surface Finishing of FDM-Fabricated Amorphous Polyetheretherketone and Its Carbon-Fiber-Reinforced Composite by Dry Milling." Polymers 13, no. 13 (June 30, 2021): 2175. http://dx.doi.org/10.3390/polym13132175.

Full text

Abstract:

In recent years, many investigations have been devoted to fused deposition modeling (FDM) of high-performance polymer-polyetheretherketone (PEEK) and carbon-fiber-reinforced PEEK (CF/PEEK) for biomedical and aerospace applications. However, the staircase effect naturally brought about by FDM restricts further applications of 3D-printed PEEK and its composites in high-temperature molds, medical implants, and precision components, which require better or customized surface qualities. Hence, this work aimed to reduce the staircase effect and improve the surface quality of 3D-printed PEEK and CF/PEEK parts by dry milling of the fluctuant exterior surface. The co-dependency between 3D printing parameters (raster angle and layer thickness) and milling parameters (depth of cut, spindle speed, and feed rate per tooth) were investigated through experiments. The difference in removal mechanisms for PEEK and CF/PEEK was revealed. It was confirmed that the smearing effect enhanced the surface quality based on the morphology analysis and the simulation model. Both the raster angle of +45°/−45° and the small layer thickness could improve the surface quality of these 3D-printed polymers after dry milling. A large depth of cut and a large feed rate per tooth were likely to deteriorate the finished polymer surface. The spindle speed could influence the morphologies without significant changes in roughness values. Finally, a demonstration was performed to verify that dry milling of 3D-printed amorphous PEEK and CF/PEEK parts could lead to a high surface quality for critical requirements.

APA, Harvard, Vancouver, ISO, and other styles

8

Song, Meiyun, Xiaoqing Wang, Ran Du, Zhen Zhou, Xiaomeng Li, Guoping Li, and Yunjun Luo. "Effects of liquid crystal polymer (LCP) on the structure and performance of PEEK/CF composites." RSC Advances 12, no. 20 (2022): 12446–52. http://dx.doi.org/10.1039/d2ra01450e.

Full text

Abstract:

Here a liquid crystal polymer (LCP) was introduced into a PEEK/CF system as a new solution to simultaneously promote processing and mechanical performance of PEEK/CF and other polymer-based composites.

APA, Harvard, Vancouver, ISO, and other styles

9

Song, Meiyun, Xiaoqing Wang, Ran Du, Zhen Zhou, Xiaomeng Li, Guoping Li, and Yunjun Luo. "Effects of liquid crystal polymer (LCP) on the structure and performance of PEEK/CF composites." RSC Advances 12, no. 20 (2022): 12446–52. http://dx.doi.org/10.1039/d2ra01450e.

Full text

Abstract:

Here a liquid crystal polymer (LCP) was introduced into a PEEK/CF system as a new solution to simultaneously promote processing and mechanical performance of PEEK/CF and other polymer-based composites.

APA, Harvard, Vancouver, ISO, and other styles

10

Lin, Hong-Ming, C. H. Liu, and R. F. Lee. "Effects of high pressure on the crystallization of carbon fiber reinforced polyetheretherketone (CF/PEEK) laminate composites." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 4 (August 1990): 876–77. http://dx.doi.org/10.1017/s0424820100177519.

Full text

Abstract:

Polyetheretherketone (PEEK) is a crystallizable thermoplastic used as composite matrix materials in application which requires high yield stress, high toughness, long term high temperature service, and resistance to solvent and radiation. There have been several reports on the crystallization behavior of neat PEEK and of CF/PEEK composite. Other reports discussed the effects of crystallization on the mechanical properties of PEEK and CF/PEEK composites. However, these reports were all concerned with the crystallization or melting processes at or close to atmospheric pressure. Thus, the effects of high pressure on the crystallization of CF/PEEK will be examined in this study.The continuous carbon fiber reinforced PEEK (CF/PEEK) laminate composite with 68 wt.% of fibers was obtained from Imperial Chemical Industry (ICI). For the high pressure experiments, HIP was used to keep these samples under 1000, 1500 or 2000 atm. Then the samples were slowly cooled from 420 °C to 60 °C in the cooling rate about 1 - 2 degree per minute to induce high pressure crystallization. After the high pressure treatment, the samples were scanned in regular DSC to study the crystallinity and the melting temperature. Following the regular polishing, etching, and gold coating of the sample surface, the scanning electron microscope (SEM) was used to image the microstructure of the crystals. Also the samples about 25mmx5mmx3mm were prepared for the 3-point bending tests.

APA, Harvard, Vancouver, ISO, and other styles

11

Zhu, Yan Ji, Hui Juan Qian, Gui Ying Wang, and Huai Yuan Wang. "Tribological Behaviors of Polymer Based Composites under Alkaline Conditions." Advanced Materials Research 510 (April 2012): 563–68. http://dx.doi.org/10.4028/www.scientific.net/amr.510.563.

Full text

Abstract:

In this paper, polyetheretherketone (PEEK) and polytetrafluoroethylene (PTFE) based composites reinforced with various amounts of potassium titanate whiskers (PTWs) or short carbon fibers (CF) were designed and fabricated respectively. The friction and wear properties of PEEK and PTFE based composites sliding under rigorous alkaline were comparatively investigated. Also, the morphologies of the worn and counterpart surfaces were studied by scanning electron microscopy (SEM). Because of the stable tunnel crystal structure and frame structure micro-reinforcement capacity, PTWs show outstanding performances in increasing the wear resistance and reducing the friction coefficients of both PEEK and PTFE based composites under alkaline. However, CF leads to the degradation of wear resistance and the increase of friction coefficient of PEEK based composites under alkaline. Furrows and abrasive wear were the main mechanisms for CF/PTFE/PEEK and CF/PTFE composites sliding in alkali. The results show that PTW/PTFE composites exhibit higher wear resistance under lower load, while PTW/PTFE/PEEK composite is more suitable for higher load under alkaline condition. Owing to the primary cooling and boundary lubricating effects of alkali, the wear rates and friction coefficients of PTFE composites and PTW/PTFE/PEEK composites decreased obviously, though the transfer films onto the counterpart steel surface were hindered considerably.

APA, Harvard, Vancouver, ISO, and other styles

12

Gao, Shang, Xinyu Zhou, Jiani Guo, and Renke Kang. "Effect of Fiber Type and Content on Surface Quality and Removal Mechanism of Fiber-Reinforced Polyetheretherketone in Ultra-Precision Grinding." Polymers 14, no. 19 (October 8, 2022): 4223. http://dx.doi.org/10.3390/polym14194223.

Full text

Abstract:

Polyetheretherketone (PEEK) is a promising thermo-plastic polymer material due to its excellent mechanical properties. To further improve the mechanical properties of PEEK, different kinds of short fibers are added into the PEEK matrix. The grinding machinability of short-fiber-reinforced PEEK varies with the effect of fiber type and content. Therefore, it is crucial to investigate the surface quality and removal mechanism of fiber-reinforced PEEK in ultra-precision grinding. In this paper, different fiber types and mass fractions of short-fiber-reinforced PEEK, including carbon-fiber-reinforced PEEK (CF/PEEK) and glass-fiber-reinforced PEEK (GF/PEEK), are employed. The grinding machinability of short-fiber-reinforced PEEK was investigated using grinding experiments with grinding wheels of different grit sizes. The effects of the fiber type and mass fraction on the surface quality and removal mechanism during grinding were discussed. The results showed that the brittle–ductile transition depth of carbon fiber was much larger than that of glass fiber, so it was easier to achieve ductile removal in grinding with the carbon fiber. Therefore, the ground surface roughness of CF/PEEK was smaller than that of GF/PEEK under the same grinding conditions. With the increase in carbon fiber mass fraction, the ground surface roughness of CF/PEEK decreased due to the higher hardness. The brittle–ductile transition depth of glass fiber was small, and it was easy to achieve brittle removal when grinding. When the glass fiber removal mode was brittle removal, the GF/PEEK surface roughness increased with the increase in glass fiber content.

APA, Harvard, Vancouver, ISO, and other styles

13

Nie, Lou, Ji, and Yin. "Tribological Performance of CF‐PEEK Sliding Against 17‐4PH Stainless Steel with Various Cermet Coatings for Water Hydraulic Piston Pump Application." Coatings 9, no. 7 (July 11, 2019): 436. http://dx.doi.org/10.3390/coatings9070436.

Full text

Abstract:

To improve the abrasion resistance performance of the critical tribopairs within water hydraulic piston pumps, tribological characteristics of the stainless steel 17‐4PH and 17‐4PH coated with Cr3C2‐NiCr, WC‐10Co‐4Cr, Cr2O3 and Al2O3‐13%TiO2 sliding against carbon fiber reinforced polyetheretherketone (CF‐PEEK) composite under water‐lubricated condition were experimentally studied using a pin‐on‐ring test bench with different working conditions. It has been demonstrated by the experimental results that the tribological behaviors of CF‐PEEK/cermet coatings tribipairs were better than that of CF‐PEEK/17‐4PH tribopair under water lubrication. However, the Cr3C2‐NiCr coating could be damaged under high rotational speed. Due to the reaction film produced by the Al2O3‐13%TiO2 and water, the CF‐PEEK/Al2O3‐13%TiO2 material combination exhibits more excellent tribological behaviors than other tribopairs lubricated with water, and could preferentially be used in water hydraulic piston pumps.

APA, Harvard, Vancouver, ISO, and other styles

14

Lu, Chunrui, Nuo Xu, Ting Zheng, Xin Zhang, Hanxiong Lv, Xue Lu, Lin Xiao, and Dongxing Zhang. "The Optimization of Process Parameters and Characterization of High-Performance CF/PEEK Composites Prepared by Flexible CF/PEEK Plain Weave Fabrics." Polymers 11, no. 1 (December 31, 2018): 53. http://dx.doi.org/10.3390/polym11010053.

Full text

Abstract:

Continuous carbon fiber (CF)-reinforced poly (ether ether ketone) (PEEK) composites have excellent mechanical properties, but their processing techniques are limited. Therefore, we promoted a braiding method based on the hybrid fiber method by hot-compacting CF/PEEK plain weave fabrics to solve the problem of difficult wetting between CF and PEEK. Four parameters—melting temperature, molding pressure, crystallization temperature and the resin contents—were investigated for optimized fabrication. After studying the melting range, thermal stability and the contact angle of PEEK under different temperatures, the melting temperature was set at 370 °C. An ultra-depth-of-field 3D microscope was adopted to investigate the effects of molding pressure in the melting stage. The tensile strength or modulus along and perpendicular to the carbon fiber direction and crystallinity under different crystallization temperatures were analyzed. As a result, the sample crystalized at 300 °C showed an excellent tensile properties and crystallinity. The increased mass ratio of PEEK ranging from 50.45% to 59.07% allowed for much stronger interfacial strength; however, the higher resin content can lead to the dispersion of CFs, loss of resin and the formation of defects during processing. Finally, the optimal resin mass content was 59.07%, with a tensile strength of 738.36 ± 14.49 MPa and a flexural strength of 659.68 ± 57.53 MPa. This paper studied the optimized processing parameters to obtain better properties from CF/PEEK plain weave fabrics and to further broaden the specific applications of CF/PEEK composites, demonstrating a new direction for its fabrication.

APA, Harvard, Vancouver, ISO, and other styles

15

Somiya, Satoshi, Naoki Segawa, and Kouhachi Ikeda. "Creep behavior on CF/PEEK Laminate." Proceedings of the JSME annual meeting 2000.1 (2000): 589–90. http://dx.doi.org/10.1299/jsmemecjo.2000.1.0_589.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Ning, Li, Chen Deqiang, Gao Xiyan, Lu Lirong, and Chen Weizeng. "Biological tribology properties of the modified polyether ether ketone composite materials." REVIEWS ON ADVANCED MATERIALS SCIENCE 59, no. 1 (September 19, 2020): 399–405. http://dx.doi.org/10.1515/rams-2020-0034.

Full text

Abstract:

AbstractModification of poly-ether-ether-ketone (PEEK) to adapt to the biological properties of materials is currently the key point in the research of medical materials. The tribological properties and biocompatibility of the PEEK composites modified by carbon fiber (CF), potassium titanate whisker(PTW) and nano-particles were discussed in this paper. The results show the modified PEEK composites by a certain length to diameter ratio of CF show the best using effect in vivo experiments in good blood compatibility, which is suitable for orthopaedic implant materials. A large number of experiments show that the PEEK composites would be modified with a certain ratio of CF (about 30%wt.), whisker (about 15%wt.) and HA (about 5%wt.) particle with better biological tribological properties, more important value in medical research.

APA, Harvard, Vancouver, ISO, and other styles

17

Jin, Zhiyi, Xifang Zhang, Zhibao Hou, Zhenqiang Yao, and Hong Shen. "Tribological Properties of Carbon Fiber-Reinforced PEEK against 304 Stainless Steel with Reticulate Surface Texture." Materials 15, no. 24 (December 9, 2022): 8789. http://dx.doi.org/10.3390/ma15248789.

Full text

Abstract:

With the aim of improving the durability and reliability of polyetheretherketone (PEEK) composites reinforced with carbon fiber (CF) as thrust bearings without lubricants, a reticulate surface texture was fabricated by plane honing on a stainless steel (SS) counterpart to promote its tribological properties. Pin-on-disk experiments were designed, with the results showing that the reticulate surface texture effectively reduces the friction coefficient from 0.40 to 0.20 compared with the polished SS surface, within the range of the pv value from 0.185 to 1.85 MPa∙m/s. The wear mechanism of the polished SS surface against CF-PEEK, proven with SEM and EDS observations as well as AE measurements, is revealed, falling into abrasive wear with SS particles embedded in the friction interface around the CF strips, causing three-body contact. The reduction in the friction coefficient of the textured SS disk against the CF-PEEK pin can be achieved due to diminution of the CF wear debris and SS particles, which are scraped off by the groove edges and trapped by the groove valleys, reducing the three-body abrasive wear, while the honed plateau is used as a flank surface like a cutting tool to scratch more soft PEEK particles as the transferred film, owing to adhesive wear. This investigation suggests that the SS disk with a honed surface structure can be used as the counterpart of CF-PEEK bearings with a low friction coefficient and wear rate under dry friction.

APA, Harvard, Vancouver, ISO, and other styles

18

Abdullah, Farhan, Kei-ichi Okuyama, Isai Fajardo, and Naoya Urakami. "In Situ Measurement of Carbon Fibre/Polyether Ether Ketone Thermal Expansion in Low Earth Orbit." Aerospace 7, no. 4 (March 26, 2020): 35. http://dx.doi.org/10.3390/aerospace7040035.

Full text

Abstract:

The low Earth orbit (LEO) environment exposes spacecraft to factors that can degrade the dimensional stability of the structure. Carbon Fibre/Polyether Ether Ketone (CF/PEEK) can limit such degradations. However, there are limited in-orbit data on the performance of CF/PEEK. Usage of small satellite as material science research platform can address such limitations. This paper discusses the design of a material science experiment termed material mission (MM) onboard Ten-Koh satellite, which allows in situ measurements of coefficient of thermal expansion (CTE) for CF/PEEK samples in LEO. Results from ground tests before launch demonstrated the feasibility of the MM design. Analysis of in-orbit data indicated that the CTE values exhibit a non-linear temperature dependence, and there was no shift in CTE values after four months. The acquired in-orbit data was consistent with previous ground tests and in-orbit data. The MM experiment provides data to verify the ground test of CF/PEEK performance in LEO. MM also proved the potential of small satellite as a platform for conducting meaningful material science experiments.

APA, Harvard, Vancouver, ISO, and other styles

19

Hassan, Elwathig, Tienah Elagib, Hafeezullah Memon, Muhuo Yu, and Shu Zhu. "Surface Modification of Carbon Fibers by Grafting PEEK-NH2 for Improving Interfacial Adhesion with Polyetheretherketone." Materials 12, no. 5 (March 7, 2019): 778. http://dx.doi.org/10.3390/ma12050778.

Full text

Abstract:

Due to the non-polar nature and low wettability of carbon fibers (CFs), the interfacial adhesion between CFs and the polyetheretherketone (PEEK) matrix is poor, and this has negative effects on the mechanical properties of CF/PEEK composites. In this work, we established a modification method to improve the interface between CFs and PEEK based chemical grafting of aminated polyetheretherketone (PEEK-NH2) on CFs to create an interfacial layer which has competency with the PEEK matrix. The changed chemical composition, surface morphology, surface energy, and interlaminar shear strength were investigated. After grafting, the interlaminar shear strength (ILSS) was improved by 33.4% due to the covalent bonds in the interface region, as well as having good compatibility between the interface modifier and PEEK. Finally, Dynamic Mechanical Analysis (DMA) and Scanning Electron Microscopy (SEM) observation also confirmed that the properties of the modified CF/PEEK composites interface were enhanced. This work is, therefore, a beneficial approach towards enhancing the mechanical properties of thermoplastic composites by controlling the interface between CFs and the PEEK matrix.

APA, Harvard, Vancouver, ISO, and other styles

20

Swaminathan, P. D., Md Nizam Uddin, P. Wooley, and Ramazan Asmatulu. "Fabrication and Biological Analysis of Highly Porous PEEK Bionanocomposites Incorporated with Carbon and Hydroxyapatite Nanoparticles for Biological Applications." Molecules 25, no. 16 (August 6, 2020): 3572. http://dx.doi.org/10.3390/molecules25163572.

Full text

Abstract:

Bone regeneration for replacing and repairing damaged and defective bones in the human body has attracted much attention over the last decade. In this research, highly porous polyetheretherketone (PEEK)/hydroxyapatite (HA) bionanocomposite scaffolds reinforced with carbon fiber (CF) and carbon nanotubes (CNTs) were fabricated, and their structural, mechanical, and biological properties were studied in detail. Salt porogen (200–500 µm size) leaching methods were adapted to produce porous PEEK structures with controlled pore size and distribution, facilitating greater cellular infiltration and biological integration of PEEK composites within patient tissue. In biological tests, nanocomposites proved to be non-toxic and have very good cell viability. In addition, bone marrow cell growth was observed, and PEEK/HA biocomposites with carbon particles showed increased cell attachment over the neat PEEK/HA composites. In cell viability tests, bionanocomposites with 0.5 wt% CNTs established good attachment of cells on disks compared to neat PEEK/HA biocomposites. A similar performance was seen in culture tests of bone marrow cells (osteoblasts and osteoclasts). The 0.5 wt% CF for osteoblasts and 1 wt% CNTs for osteoclasts showed higher cell attachment. The addition of carbon-based nanomaterials into PEEK/HA has been identified as an effective approach to improve cell attachment as well as mechanical and biological properties. With confirmed cell attachment and sustained viability and proliferation of the fabricated PEEK/HA/CNTs, CF bionanocomposites were confirmed to possess excellent biocompatibility and will have potential uses in bone scaffolding and other biomedical applications.

APA, Harvard, Vancouver, ISO, and other styles

21

Lu, Qiu, Lu, Wang, Xiao, Zheng, Wang, and Zhang. "Enhancing the Interfacial Strength of Carbon Fiber/Poly(ether ether ketone) Hybrid Composites by Plasma Treatments." Polymers 11, no. 5 (April 28, 2019): 753. http://dx.doi.org/10.3390/polym11050753.

Full text

Abstract:

As a promising alternative to traditional prepreg, carbon fiber/poly(ether ether ketone) (CF/PEEK) hybrid composites have attracted wide public interest for their flexibility and conformability. However, modification methods focused on the hybrid premix have not been previously studied. In the present work, the interfacial strength of the hybrid composite was improved by treating the carbon and PEEK fibers together in a radiofrequency (RF) plasma containing one of the following gases to achieve surface activation: air, Ar, or Ar–air. After plasma treatment, the increased roughness of CF and the grafted chemical groups of CFs and PEEK fibers were propitious to the mechanical interlocking and interfacial strength. Significant interfacial shear strength (IFSS) enhancement was achieved after Ar 1 min, air 1 min plasma treatment. This study offers an alternative method for improving the interfacial properties of CF/PEEK composites by focusing on the boundary layer and modifying and controlling the fiber–matrix interface.

APA, Harvard, Vancouver, ISO, and other styles

22

Gao, Shang, Jialu Qu, Honggang Li, and Renke Kang. "Effect of Fiber Type and Content on Mechanical Property and Lapping Machinability of Fiber-Reinforced Polyetheretherketone." Polymers 14, no. 6 (March 8, 2022): 1079. http://dx.doi.org/10.3390/polym14061079.

Full text

Abstract:

Polyetheretherketone (PEEK) is a novel polymer material with excellent material properties. The hardness and strength of PEEK can be further improved by introducing fiber reinforcements to meet the high-performance index of the aerospace industry. The machinability will be influenced when the material properties change. Therefore, it is crucial to investigate the influence of material properties of the fiber-reinforced PEEK on machinability. In this paper, the main materials include pure PEEK, short carbon-fiber-reinforced PEEK (CF/PEEK), and short glass-fiber-reinforced PEEK (GF/PEEK). The effects of the fiber type and mass fraction on the tensile strength, hardness, and elastic modulus of materials were discussed using the tensile test and nanoindentation experiments. Furthermore, the fiber-reinforced PEEK lapping machinability was investigated using lapping experiments with abrasive papers of different mesh sizes. The results showed that the hardness and elastic modulus of PEEK could be improved with fiber mass fraction, and the tensile strength of CF/PEEK can be improved compared with that of GF/PEEK. In terms of lapping ability, the material removal rates of the fiber-reinforced materials were found to be lower than the pure PEEK due to the higher hardness of the fiber. During the lapping process, the material removal methods mainly included the ductile deformation or desquamation of reinforcing fiber and ductile removal of the PEEK matrix. The lapped surface roughness of PEEK material can be improved by fiber reinforcement.

APA, Harvard, Vancouver, ISO, and other styles

23

Todoroki, Akira, Hideo Kobayashi, and Gi Jong Lee. "Micromechanism and Delamination Resistance of CF/PEEK." Transactions of the Japan Society of Mechanical Engineers Series A 60, no. 573 (1994): 1272–79. http://dx.doi.org/10.1299/kikaia.60.1272.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Lyu, Hanxiong, Naiyu Jiang, Yingze Li, and Dongxing Zhang. "Enhancing CF/PEEK interfacial adhesion by modified PEEK grafted with carbon nanotubes." Composites Science and Technology 210 (July 2021): 108831. http://dx.doi.org/10.1016/j.compscitech.2021.108831.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Lyu, Hanxiong, Naiyu Jiang, Jiqiang Hu, Yingze Li, Nan Zhou, and Dongxing Zhang. "Preparing water-based phosphorylated PEEK sizing agent for CF/PEEK interface enhancement." Composites Science and Technology 217 (January 2022): 109096. http://dx.doi.org/10.1016/j.compscitech.2021.109096.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

RISTESKA, Svetlana, Anka T. PETKOSKA, Samoil SAMAK, and Marian DRIENOVSKY. "Annealing Effects on the Crystallinity of Carbon Fiber-Reinforced Polyetheretherketone and Polyohenylene Laminate Composites Manufactured by Laser Automatic Tape Placement." Materials Science 26, no. 3 (February 27, 2020): 308–16. http://dx.doi.org/10.5755/j01.ms.26.3.21489.

Full text

Abstract:

In situ consolidation of thermoplastic composites by Automated Tape Placement (ATP) is challenging. High quality ATP grade pre-preg material and tape head equipped with an efﬁcient heat sources like lasers offer an opportunity towards high deposition rates and improved mechanical properties of composite materials. In this study uni-directional carbon fiber/ polyphenylene sulfide (UD tape prepreg CF/PPS), carbon fiber/polyetheretherketone (UD tape prepreg CF/PEEK) as well as blend of carbon fiber/polyetheretherketone/polyphenylene sulfide (UD tapes prepregs CF/PEEK/PPS) laminates are compared in terms of their properties after beeing processed by ATP technology. CF/PPS, CF/PEEK and blend CF/PPS/PEEK laminate specimens were processed using in-situ laser-assisted ATP (LATP) process. LATP processing parameters used in this study were chosen based on a preliminary trials; the results provide a basis for reﬁnement of these parameters and prepreg material with an optimal and balanced set of final mechanical properties. This study showed an attempt how to manage the processing parameters for LATP process and to obtain composite materials with tailored properties. The process for production of thermoplastic plates with LATP head in general is a process that is governed by many parameters such as: laser power, angle of incidence, roller pressure and temperature, placement speed, tool temperature, then types of the roller material and the tool material. These parameters are not subject of discussing in this paper; they are kept constant, and the goal of the paper is to manage the crystallinity level within the composite thermoplastic material during annealing step at different temperatures after LATP process. Also, the void content during the production process could be controlled. More particularly, the authors showed that composites based on PPS matrix manufactured with LATP process possess higher flexural strength, with less void content compared to samples based on PEEK matrix. These samples showed also higher crystallinity after annealing step.

APA, Harvard, Vancouver, ISO, and other styles

27

Zheng, Bing, Xiping Gao, Maoyuan Li, Tianzhengxiong Deng, Zhigao Huang, Huamin Zhou, and Dequn Li. "Formability and Failure Mechanisms of Woven CF/PEEK Composite Sheet in Solid-State Thermoforming." Polymers 11, no. 6 (June 3, 2019): 966. http://dx.doi.org/10.3390/polym11060966.

Full text

Abstract:

In this study, the formability of woven carbon-fiber (CF)-reinforced polyether-ether-ketone (PEEK) composite sheets in the solid-state thermoforming process were investigated, and the failure mechanisms were discussed. The formability of the woven CF/PEEK sheets were analyzed using flexural tests, Erichsen test, and microscopic observation. The results show that the formability of CF/PEEK sheets significantly increases as the temperature rises from 165 to 325 °C, and slightly decreases as the deformation speed rises from 2 to 120 mm/min. The deformation of the sheets is caused by plastic deformation, shear deformation and squeeze deformation, without plastic thinning and fiber slippage, which is due to the restriction of the solid matrix and locked fibers. Moreover, the wrinkles will cause fiber fracture at lower temperatures and delamination at higher temperatures. At higher temperatures, the wrinkles mainly occur at the position with [0°/90°] fibers due to the squeezing of the matrix and fibers.

APA, Harvard, Vancouver, ISO, and other styles

28

Weber, Julian, and Jens Schlimbach. "Co-consolidation of CF/PEEK tape-preforms and CF/PEEK organo sheets to manufacture reinforcements in stamp-forming process." Advanced Manufacturing: Polymer & Composites Science 5, no. 4 (October 2, 2019): 172–83. http://dx.doi.org/10.1080/20550340.2019.1673961.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Akay, M., and N. Aslan. "Polymeric Composite Hip-Joint Prosthesis." Advanced Composites Letters 1, no. 2 (March 1992): 096369359200100. http://dx.doi.org/10.1177/096369359200100207.

Full text

Abstract:

It has been claimed that the durability of hip-joint replacement improves with isoelastic prostheses. A PEEK composite accordingly appears to be a suitable material system. Prosthesis-stems were injection moulded from 30% short CF reinforced PEEK and a preliminary FE analysis indicated improved mechanical compatibility between the bone and the stem.

APA, Harvard, Vancouver, ISO, and other styles

30

Kim, Dae Hoon, Min Hyung Kim, Ji Hoon Lee, J. H. Lim, K. M. Kim, B. C. Lee, Joung Man Park, and Sung Ryong Kim. "Synergistic Effect of Hybrid Filler Contained Composites on Thermal Conductivity." Materials Science Forum 544-545 (May 2007): 483–86. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.483.

Full text

Abstract:

Thermal conductivity of polyetheretherketone (PEEK) with fillers was investigated. By adding the hybrid fillers to polymer the thermal conductivity of composites was increased significantly. Thermal diffusivity of composites was measured using laser flash method. Synergistic filler effect between particulate SiC and carbon fiber (CF) was observed for thermal conductivity. In a PEEK based composite, thermal conductivity increased to 8.25 W/m-K for a 50 vol% hybrid filler (SiC+CF) system, whereas the thermal conductivity of 40 vol% CF was 3.1 W/m-K and 50 vol% of SiC was 2.4 W/m-K, respectively. The use of hybrid filler was found to be effective in increasing thermal conductivity of its composites due to formation of effective thermal conductive path. Experimental results of two-phase system were compared with Nielsen prediction.

APA, Harvard, Vancouver, ISO, and other styles

31

Hache, Florian, Michael Delichatsios, Talal Fateh, and Jianping Zhang. "Comparison of methods for thermal analysis: Application to PEEK and a composite PEEK+CF." Journal of Fire Sciences 33, no. 3 (May 2015): 232–46. http://dx.doi.org/10.1177/0734904115584154.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Yan, Tianwen, Fei Yan, Shiyi Li, Ming Li, Yu Liu, Mengjie Zhang, Lin Jin, Lei Shang, Liu Liu, and Yuhui Ao. "Interfacial enhancement of CF/PEEK composites by modifying water-based PEEK-NH2 sizing agent." Composites Part B: Engineering 199 (October 2020): 108258. http://dx.doi.org/10.1016/j.compositesb.2020.108258.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Abdullah, Farhan, Kei-ichi Okuyama, Akito Morimitsu, and Naofumi Yamagata. "Effects of Thermal Cycle and Ultraviolet Radiation on 3D Printed Carbon Fiber/Polyether Ether Ketone Ablator." Aerospace 7, no. 7 (July 8, 2020): 95. http://dx.doi.org/10.3390/aerospace7070095.

Full text

Abstract:

The extreme heating environment during re-entry requires an efficient heat shield to protect a spacecraft. The current method of manufacturing a heat shield is labor intensive. The application of 3D printing can reduce cost and manufacturing time and improve the quality of a heat shield. A 3D printed carbon fiber/polyether ether ketone (CF/PEEK) composite was proposed as a heat shield material. The aim was to develop a heat shield and the structural member as a single structure while maintaining the necessary recession resistance. Test samples were exposed to thermal cycles and ultraviolet (UV) radiation environment. Subsequently, a tensile test was performed to evaluate the effect of thermal cycle and UV radiation on the mechanical properties. The sample’s recession performance and temperature behavior were evaluated using an arc heated wind tunnel. Exposure to thermal cycle and UV radiation have limited effect on the mechanical properties, recession behavior and temperature behavior of 3D CF/PEEK. Results from the arc heating test showed an expansion of the sample surface and better recession resistance than other existing ablator materials. Overall, 3D CF/PEEK has excellent recession resistance while maintaining mechanical properties when exposed to high temperature, thermal cycle and UV radiation.

APA, Harvard, Vancouver, ISO, and other styles

34

Gao, Pengyuan, Yanjun Wang, Dezhang Meng, Xin Zhou, and Lei Liu. "Preparation of CF/PEEK and Study on Friction Performance." IOP Conference Series: Earth and Environmental Science 714, no. 3 (March 1, 2021): 032052. http://dx.doi.org/10.1088/1755-1315/714/3/032052.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Lin Ye and Klaus Friedrich. "Processing of CF/PEEK thermoplastic composites from flexible preforms." Advanced Composite Materials 6, no. 2 (January 1997): 83–97. http://dx.doi.org/10.1163/156855197x00012.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Curtis, D. C., D. R. Moore, B. Slater, and N. Zahlan. "Fatigue testing of multi-angle laminates of CF/PEEK." Composites 19, no. 6 (November 1988): 446–52. http://dx.doi.org/10.1016/0010-4361(88)90702-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Uematsu, Yoshihiko, Takayuki Kitamura, Ryuichi Ohtani, and Taro Tatsumi. "Temperature Dependence of Delamination Fracture Toughness of CF/PEEK and CF/PMR-15 Laminates." Transactions of the Japan Society of Mechanical Engineers Series A 59, no. 566 (1993): 2286–91. http://dx.doi.org/10.1299/kikaia.59.2286.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

ISHIKAWA, Takashi, Yoichi HAYASHI, and Masamichi MATSUSHIMA. "Compression after Impact Strengths of Stiffened Panels Made of CF/PEEK and CF/Epoxy." Journal of the Japan Society for Aeronautical and Space Sciences 42, no. 484 (1994): 319–28. http://dx.doi.org/10.2322/jjsass1969.42.319.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Hassan, Elwathig A. M., Dengteng Ge, Shu Zhu, Lili Yang, Jianfeng Zhou, and Muhuo Yu. "Enhancing CF/PEEK composites by CF decoration with polyimide and loosely-packed CNT arrays." Composites Part A: Applied Science and Manufacturing 127 (December 2019): 105613. http://dx.doi.org/10.1016/j.compositesa.2019.105613.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Liu, Liu, Linghan Xiao, Xiuping Zhang, Ming Li, Yanjie Chang, Lei Shang, and Yuhui Ao. "Improvement of the thermal conductivity and friction performance of poly(ether ether ketone)/carbon fiber laminates by addition of graphene." RSC Advances 5, no. 71 (2015): 57853–59. http://dx.doi.org/10.1039/c5ra10722a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Khatri, Bilal, Manuel Francis Roth, and Frank Balle. "Ultrasonic Welding of Additively Manufactured PEEK and Carbon-Fiber-Reinforced PEEK with Integrated Energy Directors." Journal of Manufacturing and Materials Processing 7, no. 1 (December 23, 2022): 2. http://dx.doi.org/10.3390/jmmp7010002.

Full text

Abstract:

The thermoplastic polymer polyether ether ketone (PEEK) offers thermal and mechanical properties comparable to thermosetting polymers, while also being thermally re-processable and recyclable as well as compatible with fused filament fabrication (FFF). In this study, the feasibility of joining additively manufactured PEEK in pure and short carbon-fiber-reinforced form (CF-PEEK) is investigated. Coupon-level samples for both materials were fabricated using FFF with tailored integrated welding surfaces in the form of two different energy director (ED) shapes and joined through ultrasonic polymer welding. Using an energy-driven joining process, the two materials were systematically investigated with different welding parameters, such as welding force, oscillation amplitude and welding power, against the resulting weld quality. The strengths of the welded bonds were characterized using lap-shear tests and benchmarked against the monotonic properties of single 3D-printed samples, yielding ultimate lap-shear forces of 2.17kN and 1.97kN and tensile strengths of 3.24MPa and 3.79MPa for PEEK and CF-PEEK, respectively. The weld surfaces were microscopically imaged to characterize the failure behaviors of joints welded using different welding parameters. Samples welded with optimized welding parameters exhibited failures outside the welded region, indicating a higher weld-strength compared to that of the bulk. This study lays the foundation for using ultrasonic welding as a glue-free method to join 3D-printed high-performance thermoplastics to manufacture large load-bearing, as well as non-load-bearing, structures, while minimizing the time and cost limitations of FFF as a fabrication process.

APA, Harvard, Vancouver, ISO, and other styles

42

Mata, Francisco, V. N. Gaitonde, S. R. Karnik, and J. Paulo Davim. "Influence of cutting conditions on machinability aspects of PEEK, PEEK CF 30 and PEEK GF 30 composites using PCD tools." Journal of Materials Processing Technology 209, no. 4 (February 2009): 1980–87. http://dx.doi.org/10.1016/j.jmatprotec.2008.04.060.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Friedrich, Klaus, Patrick Klein, Geraldine Theiler, Lin Ye, and Yiu Wing Mai. "PEEK- and PTFE- Based Composites for Tribology Applications in a Range between Liquid Helium and Room Temperature." Key Engineering Materials 334-335 (March 2007): 597–600. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.597.

Full text

Abstract:

This study deals with the development of PEEK (polyetheretherketone) and PTFE (polytetrafluoroethylene) based composites, optimized for low friction and low wear performance under extreme environments. It is demonstrated that the incorporation of a harder polymer component into PTFE (such as PEEK particles), a short fiber reinforcement (e.g. carbon fibers CF), and internal lubricants (e.g. PTFE particles), helps to reduce the friction and to improve the wear resistance over a very wide temperature range.

APA, Harvard, Vancouver, ISO, and other styles

44

Kim, Sung Ryong, Dae Hoon Kim, Dong Ju Kim, Min Hyung Kim, and Joung Man Park. "Study on Thermal Conductivity of Polyetheretherketone/Thermally Conductive Filler Composites." Solid State Phenomena 124-126 (June 2007): 1079–82. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.1079.

Full text

Abstract:

Thermal properties of PEEK/silicon carbide(SiC) and PEEK/carbon fiber(CF) were investigated from ambient temperature up to 200°C measured by laser flash method. Thermal conductivity was increased from 0.29W/m-K without filler up to 2.4 W/m-K with at 50 volume % SiC and 3.1W/m-K with 40 volume % carbon fiber. Values from Nielsen theory that predicts thermal conductivity of two-phase system were compared to those obtained from experiment.

APA, Harvard, Vancouver, ISO, and other styles

45

Mustafa, Dalia M. T., and Sarkawt Rostam. "Friction and Wear Resistance for Polyetheretherketone Filled with Different Filler Materials: A Comparative Study." Kurdistan Journal of Applied Research 2, no. 3 (August 27, 2017): 335–40. http://dx.doi.org/10.24017/science.2017.3.55.

Full text

Abstract:

Friction and wear behavior of Polyetheretherketone (PEEK) filled with different filler composites were compared. The comparisons were made for different scholar research works which were published between 1987 – 2017.The comparison took place between different filler composites such as carbon fiber (CF) reinforced Polyetheretherketone, nanometer Al2O3, nanometer SiC, polytetrafluoroethylene (PTFE) filled PEEK, nanometer ZrO2, nanometer SiO2, nanometer Si3N4, CuS, short fiber reinforced PEEK composites, PEEK-CF30, GO-Si and Graphite composites.The friction and wear were studied according to different factors of the filler composites such as plasma treated PEEK, volume percentage, weight percentage, sliding distance, surface of roughness, and size of particles.By this work we can understand the effect of some nanometer particles which act as fillers in polyetheretherketone, and by this comparison study we conclude that friction and wear properties can be decreased or increased or stay unchanged by increasing and decreasing the amount of fillers but it can be improved by adding different fillers with certain properties to obtain optimal results.

APA, Harvard, Vancouver, ISO, and other styles

46

Wang, Wen Xia. "The Influence of Cutting Conditions on Friction and Wear Properties of PEEK, CF/PEEK and GF/PEEK Composites Using PCD Tools." Advanced Materials Research 291-294 (July 2011): 1892–96. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.1892.

Full text

Abstract:

The present study establishes the relationships between the cutting conditions (cutting speed and feed rate) on trbological properties. Three types of PEEK composites such as unreinforced PEEK, reinforced PEEK with 20% of carbon fibres and 20% of glass fibres were used for the tribological tests. The parametric analysis reveals that, wear increases with increase in feed rate and cutting velocity while the friction coefficient decreases for all the materials tested. The investigation illustrates that the addition of reinforcements to PEEK improve the tribological properties relation with the cutting conditions.

APA, Harvard, Vancouver, ISO, and other styles

47

Ye, L., K. Friedrich, D. Cutolo, and A. Savadori. "Manufacture of CF/PEEK composites from powder/sheath fibre preforms." Composites Manufacturing 5, no. 1 (March 1994): 41–50. http://dx.doi.org/10.1016/0956-7143(94)90018-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Ye, Lin, Klaus Friedrich, Joachim Kästel, and Yiu-Wing Mai. "Consolidation of unidirectional CF/PEEK composites from commingled yarn prepreg." Composites Science and Technology 54, no. 4 (January 1995): 349–58. http://dx.doi.org/10.1016/0266-3538(95)00061-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Grünewald, Jonas, Patricia P. Parlevliet, Alexander Matschinski, and Volker Altstädt. "Mechanical performance of CF/PEEK–PEI foam core sandwich structures." Journal of Sandwich Structures & Materials 21, no. 8 (July 31, 2017): 2680–99. http://dx.doi.org/10.1177/1099636217715704.

Full text

Abstract:

Previous work showed that thermoplastic composite sandwich structures offer great potential to meet the demands of lightweight structures for aviation applications. In this study, the influence of several processing parameters on the mechanical properties of thermoplastic sandwich components, consisting of carbon fibre reinforced polyetheretherketone skins and polyetherimide foam cores, is characterised. Sandwich specimens are manufactured with varying skin temperatures, core compaction distances and different polyetherimide concentrations at the skin–core interface. Following, sandwich samples are mechanically tested to characterise the bond strength, the core performance as well as the performance of the whole sandwich. The results show that in most cases the processing parameters significantly affect the cell structure of the sandwich core, provided that a proper fusion bond between skins and core exists. Thereby, the core performance seems to be weakened and failure predominantly occurs in the transition between affected and original cell structures.

APA, Harvard, Vancouver, ISO, and other styles

50

Zhang, Zhenhua, Songlin Nie, Shaohua Yuan, and Wuju Liao. "Comparative Evaluation of Tribological Characteristics of CF/PEEK and CF/PTFE/Graphite Filled PEEK Sliding against AISI630 Steel for Seawater Hydraulic Piston Pumps/Motors." Tribology Transactions 58, no. 6 (September 2015): 1096–104. http://dx.doi.org/10.1080/10402004.2015.1045651.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!