Tribological properties of PAANa/UHMWPE composite materials in seawater lubrication

2019 ◽  
Vol 39 (10) ◽  
pp. 874-882 ◽  
Author(s):  
Tian Yang ◽  
Yongliang Jin ◽  
Haitao Duan ◽  
Jiesong Tu ◽  
Dan Jia ◽  
...  
Keyword(s):  
Tribological Properties ◽  
High Performance ◽  
Friction And Wear ◽  
Surface Hardness ◽  
Hot Press ◽  
Uhmwpe Composites ◽  
Resistant Composite Material ◽  
Ultra High Molecular Weight ◽  
Press Molding ◽  
Uhmwpe Composite

Abstract To prepare a high-performance anti-friction and wear-resistant composite material for friction sub-components in marine equipment, a modification was made by adding different amounts sodium polyacrylate (PAANa) to ultra-high molecular weight polyethylene (UHMWPE). PAANa/UHMWPE-blended powders were prepared at individual weight ratios of 0/100, 3/97, 5/95, 8/92, 13/87, and 18/82 with hot-press molding. In seawater, experiments of PAANa/UHMWPE composites sliding against GCr15 have been conducted with a ball-on-disk configuration in this study. The results show the surface hardness of composites was almost the same with the increase in PAANa proportion, however, the friction coefficient and wear scars of PAANa/UHMWPE composites/GCr15 sliding pairs firstly decrease and then increase. Scanning electron microscopy (SEM) results show that wear mechanism of the composites is mainly plastic deformation and spalling. The composites with PAANa content of 3% and 5% achieves better tribological properties than the pure UHMWPE material.

Tribological properties of organotin compound modified UHMWPE

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Tian Yang ◽  
Haiping Xu ◽  
Yongliang Jin ◽  
Ke Huang ◽  
Jiesong Tu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Plastic Deformation ◽  
Tribological Properties ◽  
Adhesive Wear ◽  
Surface Hardness ◽  
Organotin Compound ◽  
Changing Trend ◽  
Uhmwpe Composites ◽  
Ultra High Molecular Weight ◽  
Properties Of Composites

Abstract A range of ultra-high molecular weight polyethylene (UHMWPE)/tetraphenyltin (Ph4Sn) nanocomposites were fabricated by hot-pressing. The surface hardness and crystallinity of composites were studied. It revealed that the surface hardness of the composites decreased slightly, and the changing trend of crystallinity was consistent with the hardness. The tribological properties of composites under seawater lubricating conditions were investigated. The experimental results showed that the friction coefficients of the composites almost keep the same but the wear reduced sharply. With the increases of Ph4Sn content, the wear of composites first decreases significantly and then increases, meanwhile the friction coefficient remains basically unchanged. The dominant wear mechanism has changed from adhesive wear to plastic deformation and finally to abrasive wear. The addition of Ph4Sn particles reduces the sensitivity of the Ph4Sn/UHMWPE composites to water and transfers the load to the UHMWPE network, resulting in the wear resistance improved.

Effect of Wettability on Tribological Properties of Porous UHMWPE

2012 ◽  
Vol 549 ◽  
pp. 670-673
Author(s):  
Gang Wu ◽  
Shuang Kun Chen ◽  
Hong Ling Qin ◽  
Chun Hua Zhao
Keyword(s):  
Contact Angle ◽  
Friction Coefficient ◽  
Porous Layer ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Wear Loss ◽  
Hot Press ◽  
Different Characteristics ◽  
Press Molding

Porous UHMWPE with different characteristics are prepared by hot press molding in Metallographic Sample Mounting. Friction and wear loss of porous UHMWPE samples are studied under different loads and lubricant on an improved tribological tester. The friction coefficient and wear loss of samples with porosity of 5.44% are lower than that of samples with porosity of 10.17%. Thickness of porous layer has little effect on the tribological properties of porous UHMWPE. Contact angle remarkable decreases with increasing porosity of UHMWPE samples. The change of wettability is the primary cause of the improving tribological properties of porous UHMWPE.

Biotribological Properties of UHMWPE Reinforce by Nano-ZrO2 Particle

2007 ◽  
Vol 330-332 ◽  
pp. 1211-1214 ◽  
Author(s):  
Dang Sheng Xiong ◽  
Nan Yuan
Keyword(s):  
Friction And Wear ◽  
Calf Serum ◽  
Artificial Joint ◽  
Wear Properties ◽  
Cause Of Failure ◽  
Uhmwpe Composites ◽  
Friction And Wear Properties ◽  
Worn Surface ◽  
Ultra High Molecular Weight ◽  
Uhmwpe Composite

Wear is the primary cause of failure of joint replacement prostheses. In this paper, the Ultra High Molecular Weight Polyethylene (UHMWPE) as an artificial joint acetabular material was reinforce by nano-ZrO2 particles. The friction and wear properties of ZrO2 - UHMWPE composites sliding against the Co-Cr-Mo alloy were studied under lubrication of distilled water, saline and calf serum. The worn surface is observed by the optics microscope to examine the wear mechanism of the composite. The hardness and wetting angle of the composites were also measured. The result shows that the hardness, wettability, friction and wear resistance were all improved by filing with nano-ZrO2 particles. The 2%ZrO2 - UHMWPE composite had the lowest wear rate.

The Effect of Zeolite on the Crystallization Behaviour and Tribological Properties of UHMWPE Composite

2013 ◽  
Vol 812 ◽  
pp. 100-106 ◽  
Author(s):  
Chang Boon Peng ◽  
Md Akil Hazizan ◽  
Ramdziah Md. Nasir
Keyword(s):  
Tribological Properties ◽  
Crystallization Behaviour ◽  
Compression Moulding ◽  
Scanning Calorimetry ◽  
Average Coefficient ◽  
Pin On Disc ◽  
Uhmwpe Composites ◽  
Ultra High Molecular Weight ◽  
Uhmwpe Composite ◽  
Worn Surfaces

In this work, the effects of adding different filler loadings (520 wt%) of zeolite to the ultra-high molecular weight polyethylene (UHMWPE) matrix on the crystallinity behaviour and tribological properties were studied. The zeolite/UHMWPE composites were fabricated using hot compression moulding. The crystallization behaviour was investigated using differential scanning calorimetry (DSC). The tribological properties were monitored using a Ducom TR-20 pin-on-disc tester under different sliding speeds of 0.209 ms-1 and 0.419 ms-1 and with various applied loads of 5, 10, 15, 20, 25, 30 and 35 N. The worn surfaces of the zeolite/UHMWPE composites were observed under the scanning electron microscope (SEM). The results showed that the addition of zeolite into UHMWPE matrix can effectively enhance the percentage crystallinity of the UHMWPE. 15 wt% zeolite-reinforced UHMWPE composites show the increase of 47% in percentage crystallinity as compared to pure UHMWPE. The wear mass loss of the composites was found to be reduced by the incorporation of zeolite in UHMWPE. In addition, the average coefficient of friction (COF) was also found to decrease with the addition of zeolite. The lowest average COF was obtained by 20 wt% zeolite reinforcements into UHMWPE. Shallower grooves and smoother worn surfaces were observed for zeolite/UHMWPE as compared to pure UHMWPE.

The Influence of Porous Structure on Tribological Properties of Porous UHMWPE

2012 ◽  
Vol 482-484 ◽  
pp. 954-957
Author(s):  
Gang Wu ◽  
Shuang Kun Chen ◽  
Hong Ling Qin ◽  
Chun Hua Zhao
Keyword(s):  
Friction Coefficient ◽  
Porous Structure ◽  
Porous Layer ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Wear Loss ◽  
Hot Press ◽  
Press Molding

Porous UHMWPE with different character were prepared by hot press molding in Metallographic Sample Mounting. Friction and wear loss of porous UHMWPE samples were studied under different loads and lubricant on an improved tribological tester. The friction coefficient and wear loss of samples with porosity of 5.44% are lower than that of samples with porosity of 10.17%, which attribute to the better porous structure and extrusion effect of lubricant in testing. Among the increasing of loads, friction and wear loss of porous samples are enhance rapidly. It is also found that the thickness of porous layer has little effect on the tribological properties of porous UHMWPE.

Friction and Wear of Potassium Titanate Whisker Filled Carbon Fabric/Phenolic Polymer Composites

2015 ◽  
Vol 137 (1) ◽  
Author(s):  
Xinrui Zhang ◽  
Xianqiang Pei ◽  
Qihua Wang ◽  
Tingmei Wang
Keyword(s):  
Wear Rate ◽  
Friction And Wear ◽  
Dip Coating ◽  
Hot Press ◽  
Carbon Fabric ◽  
Potassium Titanate ◽  
Transfer Films ◽  
Fabric Composites ◽  
Phenolic Polymer ◽  
Press Molding

Carbon fabric/phenolic composites modified with potassium titanate whisker (PTW) were prepared by a dip-coating and hot-press molding technique, and the tribological properties of the resulting composites were investigated systematically using a ring-on-block arrangement under different sliding conditions. Experimental results showed that the optimal PTW significantly decreased the wear-rate. The worn surfaces of the composites and the transfer film formed on the counterpart steel ring were examined by scanning electron microscopy (SEM) to reveal the wear mechanisms. The transfer films formed on the counterpart surfaces made contributions to the improvement of the tribological behavior of the carbon fabric composites. The friction and wear of the filled carbon fabric composites was significantly dependent on the sliding conditions. It is observed that the wear-rate increased with increasing applied load and sliding speeds.

Tribological properties of ultrahigh-molecular-weight polyethylene (UHMWPE) composites reinforced with different contents of glass and carbon fibers

2019 ◽  
Vol 71 (1) ◽  
pp. 22-30 ◽  
Author(s):  
Yanzhen Wang ◽  
Zhongwei Yin
Keyword(s):  
Molecular Weight ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
High Performance ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Content Type ◽  
Ultrahigh Molecular Weight ◽  
Pin On Disc ◽  
Uhmwpe Composites ◽  
Uhmwpe Composite

PurposeThis purpose of this study was to investigate the effects of carbon fiber (CF) and/or glass fiber (GF) fillers on the tribological behaviors of ultrahigh-molecular-weight polyethylene (UHMWPE) composites to develop a high-performance water-lubricated journal bearing material.Design/methodology/approachTribological tests were conducted using a pin-on-disc tribometer using polished GCr15 steel pins against the UHMWPE composite discs under dry conditions with a contact pressure of 15 MPa and a sliding speed of 0.15 m/s. Scanning electron microscopy, laser 3D micro-imaging profile measurements and energy-dispersive X-ray spectrometry were used to analyze the morphologies and elemental distributions of the worn surfaces.FindingsThe results showed that hybrid CF and GF fillers effectively improved the wear resistance of the composites. The fiber fillers decreased the contact area, promoted transfer from the polymers and decreased the interlocking and plowing of material pairs, which contributed to the reduction of both the friction coefficient and the wear rate.Originality/valueThe UHMWPE composite containing 12.5 Wt.% CF and 12.5 Wt.% GF showed the best wear resistance of 2.61 × 10−5mm3/(N·m) and the lower friction coefficient of 0.12 under heavy loading. In addition, the fillers changed the worn surface morphology and the wear mechanism of the composites.

Biotribological Behavior of Ultra High Molecular Weight Polyethylene Composites Containing Nature Coral

2005 ◽  
Author(s):  
Qingling Wang ◽  
Shirong Ge ◽  
Xiaolong Huang ◽  
Sahnhua Qian
Keyword(s):  
Molecular Weight ◽  
Elastic Modulus ◽  
Friction And Wear ◽  
Wear Test ◽  
Si3n4 Ceramic ◽  
Joint Replacements ◽  
Formation Method ◽  
Uhmwpe Composites ◽  
Ultra High Molecular Weight ◽  
Ball On Disc

It’s important to research on the biotribology of UHMWPE composites for developing the new joint implanted materials and the life of the joint replacements. In this research, UHMWPE-NC composites were prepared using the pressing formation method. The nano-hardness and elastic modulus evaluations of all of UHMWPE-NC composites were obtained by nanoindentation tests (Hysitron, Co.,) with the corresponding load-displacement curves confirming the characteristic properties of these materials. A ball-on disc wear test was run on the Universal Micro-Tribometer (UMT) to investigate the friction and wear behaviors of Si3N4 ceramic cross-sliding against UHMWPE-NC composites in artificial body fluids lubrication.

Preparation and Tribological Behaviors of Porous UHMWPE Using as Artificial Cartilage

2011 ◽  
Vol 199-200 ◽  
pp. 651-654
Author(s):  
Gang Wu ◽  
Chun Hua Zhao ◽  
Hong Ling Qin ◽  
Xin Ze Zhao
Keyword(s):  
Molecular Weight ◽  
Wear Resistance ◽  
Electron Microscope ◽  
Wear Loss ◽  
Hot Press ◽  
Tribological Behaviors ◽  
Lubrication Condition ◽  
Ultra High Molecular Weight ◽  
Scanning Electron ◽  
Press Molding

Porous ultra high molecular weight polyethylene (UHMWPE) materials have been developed by Hot Press molding technique in this investigation. The tribological behaviors of porous UHMWPE with different initial NaCl content were studied. The worn surfaces of UHMWPE and porous UHMWPE samples were examined using a Scanning Electron Microscope (SEM). It was found that the porous structure improved the wear resistance of porous UHMWPE with the proper initial NaCl content under water lubrication condition. The minimal wear loss was about 10.6mg in the case of the UHMWPE filled by 50% initial NaCl content, 43% less than that of pure UHMWPE sample.

scholarly journals Highly thermally conductive boron nitride@UHMWPE composites with segregated structure

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 510-518
Author(s):  
Xian Wu ◽  
Wei Liu ◽  
Li Ren ◽  
Chun Zhang
Keyword(s):  
Electron Microscopy ◽  
Boron Nitride ◽  
Molding Process ◽  
Powder Mixing ◽  
Thermally Conductive ◽  
Uhmwpe Composites ◽  
Ultra High Molecular Weight ◽  
Segregated Structure ◽  
Scanning Electron ◽  
Uhmwpe Composite

AbstractHighly thermally conductive boron nitride (BN)@ultra-high molecular weight polyethylene (UHMWPE) composites with the segregated structure were fabricated by powder mixing and hot pressing. Scanning electron microscopy and polarizing optical microscopy were used to analyze the dispersion of BN particles in the UHMWPE matrix. The morphology observation shows that BN particles are selectively located at the interfaces of UHMWPE particles and form continuous thermally conductive networks after the compression molding process. As a result, the thermal conductivity of the BN@UHMWPE composite increases to 3.37 W m−1 K−1 with 38.3 vol% BN, which is seven times larger than that of the pure UHMWPE. Furthermore, the incorporation of BN also influences the crystallinity and thermal properties of UHMWPE.

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