Preparation and Process Optimization of Ni-Tl-B Coating with Fretting Damage Resistance

2010 ◽  
Vol 139-141 ◽  
pp. 460-463
Author(s):  
Dan Lu Song ◽  
Yan Li ◽  
Ling Ling Yang
Keyword(s):  
Friction Coefficient ◽  
Surface Morphology ◽  
Process Optimization ◽  
Cell Structure ◽  
Fretting Wear ◽  
Optimum Process ◽  
Low Friction ◽  
Damage Resistance ◽  
Typical Cell ◽  
Fretting Damage

Electroless plating technology used to alleviate fretting damage of titanium alloy was studied, Ni-Tl-B coatings were prepared, process optimization was worked out by the orthogonal table, deposition rate and solution consumption per hour and the initial friction coefficient and the bearing cycles under a low friction coefficient were chose as the index to calculate the range according to the economical efficiency and the application of coating under the surface morphology analysis and the fretting friction coefficient test, optimum process was finally worked out. Surface morphology was analyzed by TM-1000 scanning electron microscope and the fretting friction coefficient was tested by the DELTALAB-NENE fretting wear tester. The results shows that the surface morphology of the Ni-Tl-B coating are all typical cell structure which will be slightly different when the process changes and the optimum Ni-Tl-B coating has outstanding fretting damage resistance.

The Damage Mechanisms under Different Fretting Modes of Bonded Molybdenum Disulfide Coating

2005 ◽  
Vol 475-479 ◽  
pp. 1545-1550 ◽  
Author(s):  
Min Hao Zhu ◽  
Zhong Rong Zhou
Keyword(s):  
Damage Mechanism ◽  
Fretting Wear ◽  
Damage Resistance ◽  
Dynamic Analyses ◽  
Inclined Angle ◽  
Fretting Damage ◽  
Mos2 Coating ◽  
Oxidation Wear ◽  
Wear Tests ◽  
Molybdenum Disulfide Coating

Fretting wear tests of bonded MoS2 coating under radial and composite fretting mode have been carried out on a new fretting rig. The maximum applied load was respectively 200N, 400N and 800N with a constant loading speed of 12mm/min. Dynamic analyses in combination with microscopic examinations through SEM and XPS have been performed. Experimental results showed that such MoS2 coating exhibited an excellent radial fretting damage resistance, and its damage strongly depended upon the applied maximum loads and inclined angle under composite fretting condition. The fretting damage mechanism of MoS2 coating also discussed under different fretting modes. The XPS analysis revealed that the oxidation of MoS2 crystal was played an important role in damage. The fretting wear of MoS2 coating was mainly represented by the mechanism of delamination and oxidation wear under composite fretting conditions.

Study on the Preparation and Alleviating Fretting Wear Property of Ni-Tl-B Coatings on Steel

2010 ◽  
Vol 97-101 ◽  
pp. 1340-1343
Author(s):  
Dan Lu Song ◽  
Ling Ling Yang ◽  
Xiao Shi
Keyword(s):  
Surface Morphology ◽  
Lead Nitrate ◽  
Fretting Wear ◽  
Wear Property ◽  
The Coefficient Of Friction ◽  
Hydraulic Servo ◽  
Plating Solution ◽  
Fretting Damage ◽  
Steel Substrates ◽  
Scanning Electron

Both of coating with lead nitrate as stabilizer (common Ni-B coating) and coating with thallium sulfate as stabilizer (Ni-Tl-B coating) were prepared on steel substrates. Meanwhile, different Ni-Tl-B coatings were also prepared by changing the content of thallium salt in solution. Several kinds of process of electroless plating Ni-B were introduced. Surface morphology was observed with TM-1000 scanning electron microscope, and the alleviating fretting damage property was tested on DELTALAB-NENE high-precision hydraulic servo fretting wear tester. The results show that: The more content of thallium salt, the rougher the surface morphology of coatings is. When the content of thallium salt in plating solution is 2mg/L, the coating has the best alleviating fretting damage property with the coefficient of friction 0.12 in running-in stage.

scholarly journals Face Grinding Surface Quality of High Volume Fraction SiCp/Al Composite Materials

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Xu Zhao ◽  
Yadong Gong ◽  
Guiqiang Liang ◽  
Ming Cai ◽  
Bing Han
Keyword(s):  
Friction Coefficient ◽  
Surface Morphology ◽  
Surface Quality ◽  
Volume Fraction ◽  
High Volume ◽  
Spindle Speed ◽  
High Volume Fraction ◽  
Machining Parameters ◽  
Al Composite

AbstractThe existing research on SiCp/Al composite machining mainly focuses on the machining parameters or surface morphology. However, the surface quality of SiCp/Al composites with a high volume fraction has not been extensively studied. In this study, 32 SiCp/Al specimens with a high volume fraction were prepared and their machining parameters measured. The surface quality of the specimens was then tested and the effect of the grinding parameters on the surface quality was analyzed. The grinding quality of the composite specimens was comprehensively analyzed taking the grinding force, friction coefficient, and roughness parameters as the evaluation standards. The best grinding parameters were obtained by analyzing the surface morphology. The results show that, a higher spindle speed should be chosen to obtain a better surface quality. The final surface quality is related to the friction coefficient, surface roughness, and fragmentation degree as well as the quantity and distribution of the defects. Lower feeding amount, lower grinding depth and appropriately higher spindle speed should be chosen to obtain better surface quality. Lower feeding amount, higher grinding depth and spindle speed should be chosen to balance grind efficiently and surface quality. This study proposes a systematic evaluation method, which can be used to guide the machining of SiCp/Al composites with a high volume fraction.

Tribological Behavior of PTFE Nanocomposites Reinforced with PBA Grafted Alumina Nanoparticles

2012 ◽  
Vol 184-185 ◽  
pp. 1380-1383
Author(s):  
Yong Ping Niu ◽  
Xiang Yan Li ◽  
Jun Kai Zhang ◽  
Ming Han ◽  
Yong Zhen Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Tribological Behavior ◽  
Compression Molding ◽  
Alumina Nanoparticles ◽  
Low Friction ◽  
Grafted Nanoparticles ◽  
Scanning Electron

Polybutyl acrylate (PBA) grafted alumina nanoparticles were synthesized. Polytetrafluoroethylene (PTFE) nanocomposites reinforced with PBA grafted nanoparticles were prepared by compression molding. The effects of PBA grafted nanoparticles on the tribological behavior of the PTFE nanocomposites were investigated on a tribometer. The abrasion mechanisms of the PTFE nanocomposites were investigated by scanning electron microscopy (SEM) of the abraded surfaces. The results show that the addition of PBA grafted nanoparticles maintains low friction coefficient and improves the wear resistance of the PTFE nanocomposites.

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