Structure and Properties of Mo Wear Resistant Coating Prepared on TC4 through Glow Plasma Deposition

2013 ◽  
Vol 668 ◽  
pp. 799-803
Author(s):  
Xiao Dong Tian ◽  
Li Jie Wang ◽  
Bo Sun
Keyword(s):  
Wear Rate ◽  
Outer Layer ◽  
Deposition Temperature ◽  
Plasma Deposition ◽  
Wear Test ◽  
Solid Solution Phase ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Tc4 Alloy ◽  
Glow Plasma

Mo wear resistant coatings on TC4 alloy were prepared by glow plasma deposition technique. The coatings were deposited at 850-1050°C for 1-5h. Structure, growth kinetics and tribological properties of the coatings were studied. The results revealed that the coatings were mainly consisted of a Mo outer layer and an interdiffusion zone composed of Mo-containing Ti-based solid solution phase just beneath the outer layer. Rising deposition temperature increased coating growth rate. The hardness of the coatings decreased with rising deposition temperature, which caused coating wear resistance decrease. Wear test demonstrated that the Mo coating wear rate was about 1/30 of the TC4 substrate wear rate under dry friction condition at the load of 98N.

Desirability-Based Performance Optimization of Wear-Resistant Coatings by HVOF Sprayed WC-Co Experiments

2011 ◽  
Vol 189-193 ◽  
pp. 3633-3639
Author(s):  
Ming Der Jean ◽  
Yih Hwang Yang ◽  
Tzu Hsuan Chien
Keyword(s):  
Wear Rate ◽  
Performance Optimization ◽  
Desirability Function ◽  
High Velocity Oxygen Fuel ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Designed Experiments ◽  
Control Factors ◽  
Desirability Analysis ◽  
Oxygen Fuel

This study presented the desirability function based on Taguchi designed experiments to solve multiple responses statistical optimal problems for the tungsten carbide/cobalt (WC-Co) coatings of high-velocity-oxygen-fuel (HVOF) processes. The eight control factors based on L18 arrays were conducted and the multi-responses of wear-resistant coatings such as hardness, deposited thickness and wear rate were evaluated simultaneously in the desirability-based experiments. Based on desirability analysis, the optimal settings have been identified, and the impacts of control factors are determined by analysis of variance on the multi-responses. Further, a confirmation run was conducted to validate the tests. Experimental results have shown that the hardness increased by 16.61% and the deposited thickness improved by 10.50%, while the wear rate decreased by 34.03%. It was clear that confirmation tests are greatly improved by way of the desirability-based multi-responses on HVOF WC-Co experiments, and these findings achieved the desired values on wear-resistant coatings. The proposed procedure was applied at HVOF sprayed WC-Co experiments, and the implementation results demonstrated its feasibility and effectiveness to maximize hardness, make a target of deposited thickness value and minimize wear rate by a HVOF.

Friction and Wear Behavior of Sucker Rod and Tubing String in the Presence of Oil Field Wastewater as the Lubricating Medium

2010 ◽  
Vol 156-157 ◽  
pp. 1343-1346
Author(s):  
Han Xiang Wang ◽  
Nai He Hou ◽  
Yan Xin Liu
Keyword(s):  
Wear Rate ◽  
Friction And Wear ◽  
Wear Resistant Coating ◽  
Frictional Pair ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Resistant Coating ◽  
Adhesion Wear ◽  
Sucker Rod ◽  
Tubing String

An MG-2000 high-speed and high-temperature friction-abrasion testing machine was used to evaluate the friction and wear behaviors of AISI1045 steel sucker rod sliding against J55 tubing string and J55 tubing strings coated with spray-welded wear-resistant coatings of various thicknesses in a ring-on-ring configuration and under the lubrication of oilfield wastewater as the lubricating medium. The worn surface morphologies of the sucker rod specimens coupled with the J55 tubing string and the J55 tubing string coated with the wear-resistant coating were observed with a scanning electron microscope. As the results, it was effective to increase the wear-resistance of the frictional pair with the addition of the wear-resistant coatings on the tubing string surface. The wear-resistant coating of a proper thickness also contributed to reducing the friction coefficient to some extent, which was helpful to reduce the friction force between the sucker rod and tubing string pair and increase the service lifetime of the pair. The decreased wear rates of the sucking rod specimens coupled with the tubing string specimens coated with the wear-resistant coating of a proper thickness were attributed to the action of the coating in decreasing adhesion wear. Moreover, the tubing string specimen recorded little difference in wear rate at normal temperature and 60°C. However, the sucker rod specimen registered as lightly larger wear rate at 60°C than at room temperature, which could be attributed to the enhanced adhesion wear and mild corrosive wear at elevated temperature. It was imperative to properly control the thickness of the wear-resistant coating on the tubing string surface so as to bring its friction-reducing and antiwear action into effect.

Formation of structural parameters and mechanical properties of multi-element coatings based on niobium nitride under different deposition conditions

2021 ◽  
pp. 67-72
Author(s):  
V.P. Tabakov ◽  
A.V. Chikhranov ◽  
Ya.A. Dolzhenko
Keyword(s):  
Mechanical Properties ◽  
Phase Composition ◽  
Chemical Composition ◽  
Deposition Temperature ◽  
Chemical Elements ◽  
Structural Parameters ◽  
Niobium Nitride ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Deposition Conditions

The results of the dependence of the chemical composition of coatings based on niobium nitride on the layout of the installation are presented. The effect of the chemical elements content in coatings based on niobium nitride on the phase composition, structural parameters and mechanical properties is determined. The effect of the deposition temperature of coatings on the mechanical properties of wear-resistant coatings is studied.

Producing of Tix-Aly Intermetallic Coatings on the Surface of Pre-Nitriding Punching Tools

2015 ◽  
Vol 799-800 ◽  
pp. 418-422
Author(s):  
E.L. Vardanyan ◽  
V.V. Budilov ◽  
I.I. Yagafarov ◽  
K.N. Ramazanov
Keyword(s):  
Mathematical Model ◽  
Computer Model ◽  
Experimental Verification ◽  
Plasma Deposition ◽  
Deposition Process ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Ion Plasma ◽  
Intermetallic Coatings ◽  
Intermetallic System

The problem of punching tools resistance increasing is investigated. Methods for intermetallic coatings synthesis are investigated. Mathematical model of vacuum ion-plasma deposition process allowing predicting coatings composition basing on intermetallic system Ti-Al was developed. Experimental verification confirmed the adequacy of the computer model. The technology hardening punching tools with wear-resistant coatings deposition based on intermetallic Ti-Al system on pre-nitriding surface in vacuum was developed. Production tests of the hardened punching tools were carried out.

Tribological Investigation of Nano Composite Coated Titanium Alloy Surfaces under Unidirectional Sliding

2012 ◽  
Vol 622-623 ◽  
pp. 787-790
Author(s):  
Prem Ananth Muthuvel ◽  
Rajagopal Ramesh
Keyword(s):  
Titanium Alloy ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Tribological Properties ◽  
Critical Parameters ◽  
Textured Surface ◽  
Textured Surfaces ◽  
Wear Resistant ◽  
Tialn Coating ◽  
Wear Resistant Coatings

Industrial application of sliding components required to improve the tribological properties by increasing the surface hardness, friction and wear resistance. Modern modification of surface layers for friction applications combines surface texturing and filling of textured layers by wear resistant coatings of various compositions to improve its functional aspect and enhanced service life. Texturing of contact surfaces has a remarkable influence on their tribological properties, especially in the effect of wear and friction. This work proposes the coating of nano sized Titanium Aluminum Nitride (TiAlN) by Magnetron Sputtering-Physical Vapour Deposition (PVD) on the Titanium alloy (6Al-4V) substrate and study the performance of the coated surfaces by pin on disc tribometer. Two kinds of substrates were prepared one is the lapped surface and the other one is the textured surface by Laser beam machining. The Tribological performance of the wear resistant coatings on lapped and textured surfaces was experimentally investigated under various normal load conditions and the results were compared. Critical parameters such as friction coefficient, wear rate, wear volume, wear morphology and micro wear mechanism were investigated in this work. The coating surfaces and wear scars were evaluated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDAX). The results showed that the TiAlN coating on textured surfaces exhibited lower friction coefficient and wear rate than the TiAlN coating on lapped surfaces under same testing conditions.

Structure of B-Modified MoSi2 Coating on C103 Alloy Prepared through Glow Plasma Deposition and HAPC Combined Method

2015 ◽  
Vol 816 ◽  
pp. 249-254
Author(s):  
Xiao Dong Tian ◽  
Xi Ping Guo ◽  
Zhi Ping Sun ◽  
Jiang Long Qu ◽  
Li Jie Wang
Keyword(s):  
Oxidation Resistance ◽  
Outer Layer ◽  
Plasma Deposition ◽  
Middle Layer ◽  
The Other ◽  
Combined Method ◽  
Two Phase ◽  
Good Oxidation Resistance ◽  
Metallurgical Bonding ◽  
Glow Plasma

Glow plasma deposition (GPD) and halide activate pack cementation (HAPC) methods were combined to prepare B-modified MoSi2 coatings on C103 alloy. The pure Mo layer was firstly deposited on the substrate through GPD process, and then Si and B were co-deposited into the Mo layer through HAPC process to form the B-modified MoSi2 coating. Experimental results revealed that the Mo layer exhibited metallurgical bonding with the substrate. Two typical coatings were produced through the above combined method. One consisted of the MoSi2 outer layer, the MoSi2+MoB two-phase middle layer and the Mo5Si3 inner layer, the other consisted of an outer deposits layer composed of MoSi2 matrix and MoB dispersions, and an inner diffusion layer composed of NbSi2, NbB2 and Nb5Si3 phases. The latter coating was oxidized at 1250 °C, and it has been found that the protective scale can form on the coating surface, which indicates the good oxidation resistance of such B-modified MoSi2 coating prepared through the combined method.

Self-Lubricating and Wear Resistant Epoxy Composites Incorporated With Microencapsulated Wax

2014 ◽  
Vol 81 (7) ◽  
Author(s):  
N. W. Khun ◽  
H. Zhang ◽  
C. Y. Yue ◽  
J. L. Yang
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Normal Load ◽  
Wear Test ◽  
Epoxy Composites ◽  
Wear Resistant ◽  
Working Parameters

Self-lubricating and wear resistant epoxy composites were developed via incorporation of wax-containing microcapsules. The effects of microcapsule size and content and working parameters on the tribological properties of epoxy composites were systematically investigated. The incorporation of microcapsules dramatically decreased the friction and wear of the composites from those of the epoxy. The increased microcapsule content or the incorporation of larger microcapsules decreased the friction and wear of the epoxy composites due to the larger amount of released wax lubricant via the rupture of microcapsules during the wear test. The friction of the composites decreased with increased normal load as a result of the promoted wear of the composites and the increased release of the wax lubricant.

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