The Effect of CF Modification on the Flexural and Tribological Properties of PTFE Composites

2011 ◽  
Vol 299-300 ◽  
pp. 17-20
Author(s):  
Wen Xia Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tribological Properties ◽  
Wear Mechanisms ◽  
Continuous Phase ◽  
Tribological Characteristics ◽  
Ptfe Composites ◽  
Surface Morphologies ◽  
Worn Surface ◽  
Scanning Electron

The effects of CF content on flexural and tribological properties of the composites were investigated. The worn surface morphologies of neat PTFE and its composites were examined by scanning electron microscopy (SEM) and the wear mechanisms were discussed. The presence of CF particles dispersed in the PTFE continuous phase exhibited superior tribological characteristics to unfilled PTFE.

The Tribological Properties of Thermoplastic Polyetherimide Composites Filled with Kevlar Pulp

2011 ◽  
Vol 66-68 ◽  
pp. 862-865 ◽  
Author(s):  
Chi Lan Cai ◽  
Wen Xia Wang ◽  
Jian Li
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tribological Properties ◽  
Wear Mechanisms ◽  
Tribological Characteristics ◽  
Representative Testing ◽  
Surface Morphologies ◽  
Worn Surface ◽  
Scanning Electron

Kevlar pulps were employed as reinforcement for polyetherimide(PEI)composite. All filled and unfilled polyetherimide composites were tested against CGr15 ball and representative testing was performed. The effects of Kevlar content on tribological properties of the PEI composites were investigated. The worn surface morphologies of pure PEI and its composites were examined by scanning electron microscopy (SEM) and the wear mechanisms were discussed. Results show that all filled polyetherimides have superior tribological characteristics to unfilled ones.

The Mechanical and Tribological Properties of Carbon Fiber Reinforced POM Composites

2012 ◽  
Vol 182-183 ◽  
pp. 135-138 ◽  
Author(s):  
Yu Qin Tian ◽  
Jun Long Huo
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Carbon Fiber ◽  
Tribological Properties ◽  
Mechanical And Tribological Properties ◽  
Wear Reduction ◽  
Representative Testing ◽  
Surface Morphologies ◽  
Worn Surface ◽  
Scanning Electron

Different contents of carbon fiber were employed as reinforcement for Polyoxymethylene (POM) composite. All filled and unfilled POM composites were tested against CGr15 ball and representative testing was performed. The effects of carbon fiber content on tribological properties of the POM composites were investigated. The worn surface morphologies of pure POM and its composites were examined by scanning electron microscopy (SEM) and the wear mechanisms were discussed. Results show that all filled polyimides have superior tribological characteristics to unfilled ones. The optimum wear reduction was obtained when the content of carbon fiber is 15vol%.

Microstructure and Tribological Properties of Cu-Fe Based Braking Materials

2014 ◽  
Vol 941-944 ◽  
pp. 280-283
Author(s):  
Xiao Yang Wang ◽  
Hong Qiang Ru
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tribological Properties ◽  
X Ray Diffraction ◽  
Pressing Method ◽  
X Ray ◽  
The Coefficient Of Friction ◽  
Worn Surface ◽  
Scanning Electron ◽  
Sic Particle

SiC particle-reinforced Cu-Fe based braking materials were fabricated by the P/M hot pressing method. The phase composition, microstructure and the worn surface of the composite were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD).The tribological properties were evaluated using a disk-on-disk type laboratory scale dynamometer. Results indicate that the friction coefficient is 0.42 in 6800rpm, 0.7MPa. With the increase of rotation speeds the coefficient of friction and stable rate were decreased.

Evaluation of the Friction and Wear Properties of PA6 Composites Filled with Nano-SiO2

2011 ◽  
Vol 299-300 ◽  
pp. 86-89
Author(s):  
Wen Xia Wang ◽  
Jian Li
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Wear Behaviour ◽  
Wear Properties ◽  
Research Article ◽  
Friction And Wear Properties ◽  
Worn Surface ◽  
Scanning Electron

PA6 composites filled with nano-SiO2were synthesized. The aim of the research article is to study the mechanical and friction and wear behaviour of nano-SiO2reinforced PA6 composites. The worn surface of the composite was examined by scanning electron microscopy. The results showed that the addition of nano-SiO2can effectively improve the mechancial and tribological properties of the PA6 composites.

scholarly journals Improvement in Tribological Properties of Cr12MoV Cold Work Die Steel by HVOF Sprayed WC-CoCr Cermet Coatings

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 825 ◽  
Author(s):  
Sheng Hong ◽  
Yuping Wu ◽  
Bo Wang ◽  
Jinran Lin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tribological Properties ◽  
Sliding Wear ◽  
Cold Work ◽  
Environmental Scanning Electron Microscopy ◽  
Effect Of Temperature ◽  
Die Steel ◽  
Die Steels ◽  
Scanning Electron

The main objective of this study was to develop an efficient coating to increase the wear resistance of cold work die steel at different temperatures. The microstructures of high-velocity oxygen-fuel (HVOF)-sprayed WC-CoCr coatings were evaluated using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effect of temperature on the tribological properties of the coatings and the reference Cr12MoV cold work die steel were both investigated by SEM, environmental scanning electron microscopy (ESEM), X-ray diffraction (XRD), and a pin-on-disk high-temperature tribometer. The coating exhibited a significantly lower wear rate and superior resistance against sliding wear as compared to the die steel at each test temperature, whereas no major differences in terms of the variation tendency of the friction coefficient as a function of temperature were observed in both the coatings and the die steels. These can be attributed to the presence of nanocrystalline grains and the fcc-Co phase in the coating. Moreover, the wear mechanisms of the coatings and the die steels were compared and discussed. The coating presented herein provided a competitive approach to improve the sliding wear performance of cold work die steel.

A two-continuous-phase sulphur–asphalt composite—development and characterization

1979 ◽  
Vol 6 (3) ◽  
pp. 406-412 ◽  
Author(s):  
J. J. Beaudoin ◽  
P. J. Sereda
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Fracture Energy ◽  
Uniaxial Tension ◽  
Mercury Porosimetry ◽  
Continuous Phase ◽  
Repair Material ◽  
Fiber Reinforced ◽  
Scanning Electron

A two-continuous-phase sulfur–asphalt composite was developed for use as a road repair material. Two methods to obtain a continuous sulfur phase in a continuous asphalt phase are described. Scanning electron microscopy and mercury porosimetry technique provided evidence for a continuous sulfur phase. Mechanical properties—determined from hardness, uniaxial tension, and fracture energy measurements—of the two-continuous-phase sulfur–asphalt composite were studied at 22 and −31 °C. Mechanical properties of fiber-reinforced (up to 2% by volume of dacron fibers) sulfur–asphalt composites were also studied.

Surface Modification of CuS Nanoparticles and their Effect on the Tribological Properties of Hybrid PTFE/Kevlar Fabric/Phenolic Composite

2010 ◽  
Vol 44 (21) ◽  
pp. 2461-2472 ◽  
Author(s):  
Hui-Juan Zhang ◽  
Zhao-Zhu Zhang ◽  
Fang Guo ◽  
Wei Jiang ◽  
Kun Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Tribological Properties ◽  
Wear Properties ◽  
Surface Modified ◽  
Environmental Temperatures ◽  
Scanning Electron ◽  
Phenolic Composite ◽  
Antiwear Ability

Oleic acid-modified CuS nanoparticles were chemically synthesized. The tribological properties of surface modified and unmodified CuS nanoparticles as additives in the hybrid polytetrafluoroethylene (PTFE)/Kevlar fabric/phenolic composite were investigated in detail. The experimental results indicated that the incorporation of modified CuS nanoparticles improved the antiwear ability of the fabric/phenolic composite at varied loads and environmental temperatures. The reasons for the enhanced wear properties of the fabric/phenolic composite filled with surface-modified CuS nanoparticles were discussed based on the results of scanning electron microscopy and Fourier transform infrared spectroscopy.

scholarly journals Research on surface morphology of polyaniline film affecting NH3 gas sensor efficiency at room temperature

2021 ◽  
Vol 63 (3) ◽  
pp. 1-5
Author(s):  
Quoc Vuong Luyen ◽  
◽  
Van Dan Bui ◽  
Trong Nghia Nguyen ◽  
Thi Hien Hoang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Electrochemical Method ◽  
Room Temperature ◽  
Pani Film ◽  
Ft Ir ◽  
Composition Structure ◽  
Surface Morphologies ◽  
Scanning Electron

In this paper, the authors presented some research results on the various surface morphologies of polyaniline (PANi) film, directly synthesised on Pt/SiO2interdigitated microelectrode area by electrochemical method. Theoutcomes of surface morphology and chemical composition structure analysis of PANi film were studied by Field-emission scanning electron microscopy (FE-SEM) and Fourier-transform infrared (FT-IR), respectively. The PANi film was fabricated with the nanowires (NWs) form with their diameter from 50÷100 nm. The length of several micrometers depends on aniline concentration and synthesis condition. The obtained consequences demonstrated that the PANi - NWs are fully potential objects for the detection of NH3gas at room temperature.

scholarly journals VARIASI KONSENTRASI ION Ni2+ TERHADAP DISPERSI Si3N4 PADA LAPISAN NANOKOMPOSIT Ni-SILIKON NITRIT

2016 ◽  
Vol 11 (1) ◽  
Author(s):  
Ridwan Ridwan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Energy Dispersive ◽  
Dispersed Phase ◽  
X Ray ◽  
Nano Silicon ◽  
Surface Morphologies ◽  
Scanning Electron

Pelapisan nanokomposit Ni/Si3N4 pada substrat Cu telah dilakukan dengan proses elektroplating pada berbagai konsentrasi ion Ni2+ pada 0,26; 0,56; 0,86; 1,16; dan 1,46 M. Nano silicon nitrit dicampur pada larutan sebagai dispersed phase. Pengaruh konsentrasi ion Ni2+ dalam larutan plating dikaji terhadap dispersi partikel pada lapisan nanokomposit Nikel-Silikon Nitrit. Untuk mengetahui struktur, sifat-sifat fisik dan kimia dari bahan sintesis, beberapa prosedur karakterisasi telah dilakukan. Dari hasil analisis komposisi lapisan nanokomposit menggunakan energy dispersive X-ray analysis (EDX), diperoleh penurunan konsentrasi ion Ni2+ pada elektrolit menyebabkan peningkatan kandungan Si pada lapisan nanokomposit Ni/S3N4 dari 0,62 at.% menjadi 3,01 at.%. Sedangkan dari Scanning Electron Microscopy (SEM) surface morphologies lapisan nanokomposit Ni/Si3N4 terlihat struktur dari lapisan nano komposit compact (padat) dan ukuran butir semakin kecil dengan penurunan konsentrasi ion Ni2+. Secara umum dispersi dari partikel penguat Si pada lapisan nanokomposit Ni/Si3N4 merata pada permukaan lapisan. semakin kecil konsentrasi ion Ni2+ dalam larutan plating semakin tinggi efisiensinya.Kata kunci: Elektroplating, Nanokristal, Nanokomposit, Ni, Si3N4

Enhancement of Cu Nanoparticles Dispersion in Nanolubricants by Magnetron Sputtering Deposition and Its Influence on the Tribological Behavior

2021 ◽  
Vol 143 (11) ◽  
Author(s):  
M. F. Trajano ◽  
D. F. Franceschini ◽  
Edimilson F. Silva ◽  
M. Assolin Correa ◽  
F. Bohn ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetron Sputtering ◽  
Tribological Properties ◽  
Nanoparticle Dispersion ◽  
Cu Nanoparticles ◽  
Sputtering Deposition ◽  
X Ray Scattering ◽  
Nanoparticles Dispersion ◽  
Scanning Electron

Abstract We investigated the chemical, physical, and tribological properties of nanolubricants consisting of epoxidized sunflower oil with Cu nanoparticles as additive. These latter are produced by magnetron sputtering at distinct current levels in the deposition, to improve the development of nanolubricants by enhancing the nanoparticles dispersion. The nanolubricants are here characterized by Fourier transform infrared spectroscopy, zeta potential, ultraviolet–visible absorbance spectroscopy, small-angle X-ray scattering, and scanning electron microscopy. After all, the tribological properties of the bionanolubricants are investigated using a high-frequency reciprocating rig equipment, scanning electron microscopy, and energy dispersive spectroscopy. Our results disclose the nanolubricants produced using the magnetron sputtering technique have excellent nanoparticle dispersion, as well as good tribological performance.

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