Laser Cladding In-Situ Ti(C,N) Particles Reinforced Ni-Based Composite Coatings Modified with CeO2 Nanoparticles

To improve the wear resistance of titanium alloy parts used in the engineering applications, in-situ formed Ti(C,N) particles reinforcing Ni-based composite coatings are fabricated on Ti6Al4V alloys by the laser cladding technique using Ni60, C, TiN, and small amounts of CeO2 nanoparticles mixed powders as the pre-placed materials. Firstly, the formation mechanism of Ti(C,N) particles as a reinforced phase in the coating is investigated. Then, the influences of CeO2 nanoparticles on microstructures and wear resistance of the coatings are analyzed. It is indicated that the large Ti(C,N) particles form around TiN particles, and the small Ti(C,N) particles form through independent nucleation. CeO2 nanoparticles play important roles in increasing the nucleation rate and improving the precipitation of Ti(C,N), hence the microstructures and wear resistance of the coatings are apparently improved after adding CeO2 nanoparticles. It is observed that the 1 wt % content of CeO2 additive in the pre-placed powders is the best choice for the wear resistance of the coatings.

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SURFACE PROPERTIES OF THE IN SITU FORMED CERAMICS REINFORCED COMPOSITE COATINGS ON TI-3AL-2V ALLOYS

Surface Review and Letters ◽

10.1142/s0218625x12500096 ◽

2012 ◽

Vol 19 (02) ◽

pp. 1250009 ◽

Cited By ~ 3

Author(s):

PENG LIU ◽

WEI GUO ◽

DAKUI HU ◽

HUI LUO ◽

YUANBIN ZHANG

Keyword(s):

Wear Resistance ◽

Titanium Alloy ◽

Composite Coating ◽

Surface Properties ◽

Laser Cladding ◽

Composite Coatings ◽

Micro Hardness ◽

Reinforced Composite

The synthesis of hard composite coating on titanium alloy by laser cladding of Al/Fe/Ni+C/Si3N4 pre-placed powders has been investigated in detail. SEM result indicated that a composite coating with metallurgical joint to the substrate was formed. XRD result indicated that the composite coating mainly consisted of γ- (Fe, Ni) , FeAl , Ti3Al , TiC , TiNi , TiC0.3N0.7 , Ti2N , SiC , Ti5Si3 and TiNi . Compared with Ti-3Al-2V substrate, an improvement of the micro-hardness and the wear resistance was observed for this composite coating.

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MICROSTRUCTURE AND WEAR RESISTANCE OF IN-SITU SYNTHESIZED TiB2–TiC/Fe COMPOSITE COATING BY LASER CLADDING

Surface Review and Letters ◽

10.1142/s0218625x20500468 ◽

2020 ◽

pp. 2050046

Author(s):

TIANWEI YANG ◽

ZHAOHUI WANG ◽

SHIHAI TAN ◽

FU GUO

Keyword(s):

Wear Resistance ◽

Laser Cladding ◽

Composite Coatings ◽

X Ray Diffraction ◽

Mixed Powder ◽

X Ray ◽

Material Surfaces ◽

Metallurgical Bonding ◽

Steel Surfaces

To increase the strength and wear resistance of material surfaces, various combinations of B4C and 80TiFe powder were mixed into a Fe60 self-fluxing alloy powder; the composite coatings reinforced by TiB2–TiC were successfully prepared on Q235 steel surfaces by laser cladding. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD) were used to study the microstructure and chemical and phase composition. Microhardness and wear testers were used to investigate the mechanical properties. The results show that the interfaces of composite coatings and substrate materials are excellent for metallurgical bonding. The block-like TiB2 particles and flower-like TiC particles are uniformly distributed in the cladding coating. When the mass fraction of the mixed powder is 30%, the average microhardness of the coating is approximately 1100 HV[Formula: see text], which is 50% higher than that without the mixed powder, and demonstrates the best wear with a performance twice as better as that of the substrate.

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Effect of Y2 O3 on microstructural characteristics and wear resistance of cobalt-based composite coatings produced on TA15 titanium alloy surface by laser cladding

Surface and Interface Analysis ◽

10.1002/sia.5697 ◽

2014 ◽

Vol 47 (2) ◽

pp. 239-244 ◽

Cited By ~ 9

Author(s):

Donghua Lu ◽

Shasha Liu ◽

Xiaoyu Zhang ◽

Weiping Zhang

Keyword(s):

Wear Resistance ◽

Titanium Alloy ◽

Laser Cladding ◽

Composite Coatings ◽

Alloy Surface ◽

Microstructural Characteristics ◽

Ta15 Titanium Alloy

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Microstructure and Corrosion of Laser Cladding Coatings on Titanium Alloy With Nd2O3

Journal of Engineering Materials and Technology ◽

10.1115/1.4048280 ◽

2020 ◽

Vol 143 (1) ◽

Author(s):

Guangyu Han ◽

Youfeng Zhang

Keyword(s):

Corrosion Resistance ◽

Titanium Alloy ◽

Laser Cladding ◽

Electrical Impedance ◽

Composite Coatings ◽

Electrical Impedance Spectroscopy ◽

Corrosion Properties ◽

Capacitive Behavior ◽

Refined Microstructure

Abstract Composite coatings of TiB were successfully obtained on the surface of a Ti–6Al–4V alloy by in situ laser cladding technology using Ti/B/Nd2O3 powders. The microstructure and corrosion resistance of the fabricated composite coatings were investigated because relevant studies have been thus far limited in this field. The results indicate that the cladding coating and the substrate combined well via metallurgy after laser cladding treatment, and no obvious cracks were observed in the cladding coatings. The coatings comprise only the TiB and the α-Ti phase. The addition of Nd2O3 promoted the formation of a uniform and refined microstructure of the cladding coatings, and a well-defined structure was obtained when the added Nd2O3 content was 2 wt%. The microhardness of the cladding coating obviously improved by 3 to 4 fold above that of the Ti–6Al–4V substrate. Moreover, the corrosion properties significantly improved by adding Nd2O3 into the coatings. Electrical impedance spectroscopy and polarization tests showed that the best corrosion resistance of the cladding coating was achieved with the addition of 2 wt% Nd2O3. All samples revealed obvious near-capacitive behavior after immersion in a corrosive medium.

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Effect of CeO2 on crack sensitivity and tribological properties of Ni60A coatings prepared by laser cladding

Advances in Mechanical Engineering ◽

10.1177/16878140211013125 ◽

2021 ◽

Vol 13 (4) ◽

pp. 168781402110131

Author(s):

Gong Yuling ◽

Wu Meiping ◽

Miao Xiaojin ◽

Cui Chen

Keyword(s):

Wear Resistance ◽

Titanium Alloy ◽

Laser Cladding ◽

Composite Coatings ◽

Energy Dispersive Spectrometer ◽

Wear Test ◽

Hardness Test ◽

High Wear Resistance ◽

Fine Crystal ◽

Tc4 Titanium Alloy

All the time, the wear resistance of TC4 titanium alloy restricts its application in friction parts. In order to solve this problem, in this work, CeO2/Ni60A composite coatings (0, 1, 2, 3, 4 wt.% CeO2) were prepared on TC4 titanium alloy by laser cladding technology. The detection and characterization of the coatings were mainly carried out by X-ray diffraction (XRD), Scanning electron microscope (SEM), Energy-dispersive spectrometer, Vickers hardness test, and wear test. The results showed that appropriate proportion of CeO2 powder could effectively reduce the crack sensitivity of Ni60A coating on TC4 substrate. While the amount of CeO2 powder was 3wt.%, there were no obvious cracks, pores, and other defects in the coating. Coatings mainly consisted of Ti2Ni, TiC, TiB2, Ce2O3, and the substrate α–Ti. CeO2 has negligible influence on the composition of the phase, but it significantly increased the absorption rate of the powder to light, promoted the fluidity of the molten pool. Among five coatings, the average hardness of the 3Ce coating was the highest and the highest hardness value could reach 1163.7 HV0.3, which was 3.58 times higher than TC4 substrate, the friction coefficient was 0.307, and the wear rate was 1.11 × 10−5 mm3/N m, which reflected extremely high wear resistance performance. Adding an appropriate amount of CeO2 improved the microstructure of the coating, and realized the fine crystal strengthening of the coating.

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Microstructure and Wear Resistance of the Composite Coatings Fabricated on Titanium Alloys by Laser Cladding

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.139-141.398 ◽

2010 ◽

Vol 139-141 ◽

pp. 398-401

Author(s):

You Feng Zhang ◽

Jun Li

Keyword(s):

Wear Resistance ◽

Composite Coating ◽

Laser Cladding ◽

Wear Behavior ◽

Composite Coatings ◽

Dry Sliding Wear ◽

Matrix Composites ◽

Hardness Tester ◽

Scan Speed

In situ reaction synthesized TiB reinforced titanium matrix composites were fabricated using rapid non-equilibrium synthesis techniques of laser cladding. TiB/Ti composite coating was treated on Ti-6Al-4V surface using Ti and B powder mixture by laser cladding. Microstructure and dry sliding wear behavior of the in situ synthesized TiB/Ti composite coatings were investigated by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), energy-dispersive spectroscopy (EDS), hardness tester and friction and wear tester. The composite coatings consist of Ti, TiB and intermetallic compounds. The TiB reinforcement dispersed homogeneously in the composite coatings. The wear tests show that the friction coefficient and wear weight loss ratio of the coatings is lower than that of the Ti-6Al-4V alloy. The composite coating was reinforced by the in situ synthesized TiB ceramic particles. Based on the SEM observation, effects of scan speed on hardness and wear resistance of the laser cladding coatings were investigated and discussed.

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CHARACTERIZATION OF VC–VB PARTICLES REINFORCED FE-BASED COMPOSITE COATINGS PRODUCED BY LASER CLADDING

Surface Review and Letters ◽

10.1142/s0218625x16500190 ◽

2016 ◽

Vol 23 (04) ◽

pp. 1650019 ◽

Cited By ~ 1

Author(s):

K. L. QU ◽

X. H. Wang ◽

Z. K. Wang

Keyword(s):

Wear Resistance ◽

Laser Beam ◽

Boron Carbide ◽

Laser Cladding ◽

Composite Coatings ◽

Laser Beam Melting ◽

Black Flower

In situ synthesized VC–VB particles reinforced Fe-based composite coatings were produced by laser beam melting mixture of ferrovanadium (Fe–V) alloy, boron carbide (B4C), CaF2 and Fe-based self-melting powders. The results showed that VB particles with black regular and irregular blocky shape and VC with black flower-like shape were uniformly distributed in the coatings. The type, amount, and size of the reinforcements were influenced by the content of FeV[Formula: see text]40 and B4C powders. Compared to the substrate, the hardness and wear resistance of the composite coatings were greatly improved.

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Microstructure and Property of In-Situ TiC Reinforced Co-Based Composite Coatings by Laser Cladding

Science of Advanced Materials ◽

10.1166/sam.2019.3610 ◽

2019 ◽

Vol 11 (12) ◽

pp. 1798-1805 ◽

Cited By ~ 1

Author(s):

Xiumin Quan ◽

Lin Ding

Keyword(s):

Wear Resistance ◽

Statistical Analysis ◽

Laser Cladding ◽

Significant Influence ◽

Steel Surface ◽

Composite Coatings ◽

Multivariate Statistical ◽

Maximum Improvement ◽

In Situ Tic

In order to improve the wear resistance of Co-based alloy coatings, in-situ TiC reinforced Co-based composite coatings were prepared on 45 steel surface by laser cladding Co-based alloy, Ti and C powders. The effect of (Ti + C) addition on the microstructure and wear resistance of in-situ TiC reinforced Co-based composite coatings was investigated systematically. The results showed that TiC and Co3Ti phases were detected in the in-situ TiC reinforced Co-based composite coatings, besides γ-Co and Cr23C6. The in-situ TiC reinforced Co-based composite coatings was mainly composed of planar crystals in the binding zone, dendrites in the bottom and equiaxed crystals in the upper. With the increase of (Ti + C) addition, the number of short rod-like dendrites and equiaxed crystals was gradually increased, the microstructure was more fine and uniform. The microhardness of the composite coatings was improved gradually, and the maximum improvement in the microhardness was 35.7%, for 30.0 wt.% (Ti + C) addition. The mass loss of the composite coatings was firstly reduced and then increased, the lowest value was 10.5 mg for 20.0 wt.% (Ti + C) addition, which was 59.7% of that of Co-based alloy coatings, and the wear mechanism of the composite coatings after adding (Ti + C) was the abrasive wear. These results indicated that adding (Ti + C) had a significant influence on the properties of the composite coatings, and were consistent with the calculated results of applied multivariate statistical analysis.

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