Dry Sliding Behaviors of PDCPD Nanocomposite Prapared by RIM

2010 ◽  
Vol 34-35 ◽  
pp. 1916-1919
Author(s):  
Bing Li Pan ◽  
Chun Fei Zhang ◽  
Yu Qing Zhang
Keyword(s):  
Friction And Wear ◽  
Processing Technique ◽  
Clay Nanocomposites ◽  
Dry Sliding ◽  
X Ray Diffraction ◽  
X Ray ◽  
Reaction Injection Molding ◽  
Rapid Processing ◽  
Worn Surface ◽  
Scanning Electron

Reaction injection molding (RIM) is a rapid processing technique for the formation of polymer parts by direct polymerization in the mold. Polydicyclopentadiene (PDCPD)/Clay nanocomposites with various amounts of clay were synthesized with a Gusmer-Decker machine by RIM, and the specific injection conditions of the nanocomposites were obtained. The results of X-ray diffraction (XRD) diagrams of the nanocomposites showed that clay were completely exfoliated. The tribological behaviors of PDCPD nanocomposites were studied using an MM-200 friction and wear tester. The experimental results showed that the wear mass loss of nanocomposites reach the minimum while the MMT content of the nanocomposites is 1wt%. The values of friction coefficient almost keep constant within the range of MMT content as added.The worn surface of PDCPD nanocomposites was examined with a scanning electron microscope (SEM) and the friction and wear mechanism was discussed.

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.

Tribological Performance Optimization of Electroless Nickel Coatings Under Lubricated Condition

2018 ◽  
pp. 250-280 ◽  
Author(s):  
Santanu Duari ◽  
Arkadeb Mukhopadhyay ◽  
Tapan Kumar Barman ◽  
Prasanta Sahoo
Keyword(s):  
Performance Optimization ◽  
Friction And Wear ◽  
Electroless Nickel ◽  
Heat Treating ◽  
Wear Depth ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heat Treated ◽  
Electroless Ni ◽  
Scanning Electron

The present chapter aims to determine optimal tribo-testing condition for minimum coefficient of friction and wear depth of electroless Ni-P, Ni-P-W and Ni-P-Cu coatings under lubrication using grey relational analysis. Electroless Ni-P, Ni-P-W and Ni-P-Cu coatings are deposited on AISI 1040 steel substrates. They are heat treated at suitable temperatures to improve their hardness. Coating characterization is done using scanning electron microscope, energy dispersive X-Ray analysis and X-Ray diffraction techniques. Typical nodulated surface morphology is observed in the scanning electron micrographs of all the three coatings. Phase transformation on heat treating the deposits is captured through the use of X-Ray diffraction technique. Vicker's microhardness of the coatings in their as-deposited and heat treated condition is determined. Ni-P-W coatings are seen to exhibit the highest microhardness. Friction and wear tests under lubricated condition are carried out following Taguchi's experimental design principle. Finally, the predominating wear mechanism of the coatings is discussed.

scholarly journals Friction and Wear Characteristics of 18Ni(300) Maraging Steel under High-Speed Dry Sliding Conditions

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1485
Author(s):  
Kun Sun ◽  
Weixiang Peng ◽  
Binghui Wei ◽  
Longlong Yang ◽  
Liang Fang
Keyword(s):  
Maraging Steel ◽  
High Speed ◽  
Friction And Wear ◽  
Adhesive Wear ◽  
Dry Sliding ◽  
X Ray Diffraction ◽  
X Ray ◽  
Friction And Wear Characteristics ◽  
Increasing Load ◽  
Worn Surfaces

18Ni(300) maraging steel, which has exceptional strength and toughness, is used in the field of aviation and aerospace. In this paper, using a high-speed tribo-tester, tribological behaviors of 18Ni(300) maraging steel were investigated under high-speed dry sliding conditions. Morphology of the worn surfaces and the debris was analyzed by scanning electron microscope, and the oxides of worn surfaces caused by friction heat were detected by X-ray diffraction. The experiment results reveal that the friction coefficient of frictional pairs declines with increasing load and speed. With the speed and load increasing, oxides of the worn surfaces of 18Ni(300) maraging steel change from FeO to Fe3O4 and the wear mechanism converts from adhesive wear into severe oxidative or extrusion wear.

Research on Friction and Wear Properties of Ti(C,N)/Fe Composites

2013 ◽  
Vol 650 ◽  
pp. 326-332
Author(s):  
Yang Li ◽  
Zhi Ping Sun ◽  
Rui Feng Wang ◽  
Li Yan Zou
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Friction And Wear ◽  
Adhesive Wear ◽  
Sintering Process ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
X Ray ◽  
Friction And Wear Properties ◽  
Scanning Electron

The effect of different load, revolving speed ,content of Ti(C,N) and sintering process on the friction coefficient and wear rate of Ti(C,N)/Fe composites was investigated systemically. Besides, the wear morphology of Ti(C,N)/Fe composites were researched with an environment scanning electron microscopy(SEM),and the phase composition were studied by X-ray diffraction(XRD).The research shows that the wear mechanism of Ti(C,N)/Fe composites are abrasive wear and adhesive wear.

Effects of Rare Earth (RE) Additives on Performances of Micro-Arc Oxidation Coatings Formed on Aluminum Alloy

2013 ◽  
Vol 850-851 ◽  
pp. 140-143 ◽  
Author(s):  
Dan Huang ◽  
Xiao Yan Zhang ◽  
De Feng Wu ◽  
Xiao Song Zhou
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Friction And Wear ◽  
Alloy Sample ◽  
X Ray Diffraction ◽  
X Ray ◽  
Micro Cracks ◽  
Micro Arc Oxidation ◽  
Α Al2o3 ◽  
Scanning Electron

Scanning electron microscope (SEM), X-ray diffraction (XRD), VSP electrochemical workstation and friction and wear tester equipment are applied for comparing the effects on organizations and properties of micro-arc oxidation fabricated on a piece of aluminum alloy sample with additives of La (NO3)3 or Ce (SO4)2. The results revealed that both coatings with these two different additives are consisted of α-Al2O3 and γ-Al2O3, but the peaks of main phases are evident with La (NO3)3. Compared the two different coatings, it could be found that less micro-cracks can be observed from the coating with La (NO3)3 additive. Beside this, aperture in this coating is also smaller and corrosion resistance and wear resistance are much better.

High Temperature Wear of Ti3AlC2 Sliding against Al2O3

2010 ◽  
Vol 177 ◽  
pp. 118-120 ◽  
Author(s):  
Feng Jiang ◽  
Shu Fang Ren ◽  
Jun Hu Meng ◽  
Jin Jun Lu
Keyword(s):  
Sliding Wear ◽  
Friction And Wear ◽  
Room Temperature ◽  
Oxidation Layer ◽  
X Ray ◽  
High Temperature Wear ◽  
Increasing Temperature ◽  
Wear Transition ◽  
Worn Surface ◽  
Scanning Electron

Bulk Ti3AlC2 was prepared via hot pressing TiC, Ti and Al powders in vacuum. The sliding wear of Ti3AlC2 against Al2O3 at room temperature up to 800°C was investigated on a SRV-IV oscillating friction and wear tester. Reduced wear and wear transition of Ti3AlC2/Al2O3 tribo-couple were found by increasing temperature. The worn surfaces of both Ti3AlC2 and Al2O3 were analyzed by scanning electron microscope and X-ray photoelectron spectrometer. It was found that the severe wear of Ti3AlC2 and Al2O3 from room temperature to 200°C was related to mechanical wear, i.e. grain fracture and pullout of Ti3AlC2. At temperature higher than 400°C, the tribo-oxidation layer on the worn surface of Ti3AlC2 containing TiO2 and Al2O3 was beneficial for reducing wear of both Ti3AlC2 and Al2O3.

Kinetics and Tribological Characterization of Pack-Borided AISI 1025 Steel

2017 ◽  
Vol 36 (3) ◽  
pp. 197-208 ◽  
Author(s):  
O. A. Gómez-Vargas ◽  
M. Keddam ◽  
M. Ortiz-Domínguez
Keyword(s):  
Diffusion Coefficients ◽  
Present Model ◽  
Dry Sliding ◽  
Boron Diffusion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pin On Disc ◽  
Tribological Characterization ◽  
Scanning Electron

AbstractIn this present study, the AISI 1025 steel was pack-borided in the temperature range of 1,123–1,273 K for different treatment times ranging from 2 to 8 h. A diffusion model was suggested to estimate the boron diffusion coefficients in the Fe2B layers. As a result, the boron activation energy for the AISI 1025 steel was estimated as 174.36 kJ/mol. This value of energy was compared with the literature data. To extend the validity of the present model, other additional boriding conditions were considered. The boride layers formed on the AISI 1025 steel were characterized by the following experimental techniques: scanning electron microscopy, X-ray diffraction analysis and the Daimler–Benz Rockwell-C indentation technique. Finally, the scratch and pin-on-disc tests for wear resistance were achieved using an LG Motion Ltd and a CSM tribometer, respectively, under dry sliding conditions.

Effects of Additives on the Surface Layers of Boronized TC4 Titanium Alloys

2014 ◽  
Vol 887-888 ◽  
pp. 384-387 ◽  
Author(s):  
Li Na Wang ◽  
Feng Hua Li ◽  
Meng Ge Dong ◽  
Ying Nan Li
Keyword(s):  
Electron Microscopy ◽  
Titanium Alloys ◽  
Friction And Wear ◽  
Testing Machine ◽  
Boride Layer ◽  
Wear Testing ◽  
X Ray Diffraction ◽  
Surface Layers ◽  
X Ray ◽  
Scanning Electron

The boronizing experiments on the surface of Ti-6Al-4V (TC4) titanium alloys were based on solid powder method. Different additives were added into the boronizing agent. The morphologies of surface layers on titanium alloys were observed in scanning electron microscopy (SEM). The phase compositions of boronized layers were analyzed by X-ray diffraction (XRD). The wear resistance properties of boronized TC4 were determined by the friction and wear testing machine. The results showed that all the boronized layers were composed of TiB2and TiB dual phases.When 5%Fe3O4was added into the boronizing agent, the boride layer contained more TiB2compound and was thicker than those with the addition of 5%Na2B4O7.

Laser Alloying of Multi-Carbides Reinforced Metal Matrix Coating on a Ductile Iron

2010 ◽  
Vol 154-155 ◽  
pp. 1182-1185
Author(s):  
Wen Yan Wang ◽  
Xiao Ming Dong ◽  
Jing Pei Xie
Keyword(s):  
Ductile Iron ◽  
Metal Matrix ◽  
Friction And Wear ◽  
Energy Dispersive Spectrum ◽  
Alloyed Layer ◽  
Hard Phase ◽  
X Ray Diffraction ◽  
Yag Laser ◽  
X Ray ◽  
Scanning Electron

A ductile iron coated with metal-matrix pastes containing hard phase TiC and CrxCy was laser alloyed by an Nd: YAG laser and a CO2 laser. The microstructure, composition and wear resistance were analyzed by scanning electron microscopy (SEM), incorporating energy dispersive spectrum (EDS), X-ray diffraction analysis (XRD) and friction wear tester respectively. Results revealed that the alloyed area was composed by alloyed zone and heat affected zone. The microstructure of the alloyed layer was significantly influenced by the laser beam kind. Finer grains and fewer cementites were contained in the alloyed layer produced by Nd: YAG laser. Friction and wear experiments showed that the alloyed layer had better tribology properties.

scholarly journals EFFECT OF THE N2/Ar FLOW RATIO ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF TiSiCN COATINGS

2021 ◽  
Vol 55 (6) ◽  
Author(s):  
Jin Wang ◽  
Mengting Wang ◽  
Yongqiang Wang ◽  
Dayan Ma ◽  
Hao Li
Keyword(s):  
Photoelectron Spectroscopy ◽  
Friction And Wear ◽  
Diffraction Peak ◽  
Flow Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ion Plating ◽  
Large Particles ◽  
Amorphous Sic ◽  
Scanning Electron

TiSiCN coatings were prepared with the multi-arc ion plating and magnetron sputtering technique. The effect of the N2/Ar flow ratio on the properties of TiSiCN coatings was studied using scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and a friction and wear tester (UMT-3). With an increase in the N2/Ar flow ratio, the number of large particles on the surface first increases and then decreases. The intensity of the TiN (200) diffraction peak increases gradually, while the grain size first decreases and then increases. A TiSiCN coating consists of Ti (N, C) nanocrystallites, amorphous SiC, Si3N4 and carbon. When the N2/Ar flow ratio is 5 : 1, the coating exhibits the highest hardness and excellent wear resistance.

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