A novel load-insensitive Co3Mo2Si reinforced in-situ metal-matrix composite coating for wear resistance application

The in situ synthesized ZrC particulate reinforced metal matrix composite coating was fabricated on AISI1020 steel by gas tungsten arc (GTA) cladding powder mixture of Nickel, Zirconium and Graphite. The microstructure and wear resistance of the composite coating were investigated. It is shown that the coating is bonded metallurgically to the substrate and has a homogeneous fine microstructure containing both approximate cubic ZrC particle uniformly dispersed in matrix of (Fe,Ni) solid solution. Compared to a substruate, the hardness of the composite coating was increased by a factor of 6, could achieve a Vicker microhardness of HV0.21100. And the wear resistance in a block on ring test against YG8 was increased by a factor of 10. This is attributed to the presence of in situ synthesized ZrC particles and their well distribution in the coating.

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In Situ Production of Hard Metal Matrix Composite Coating on Engineered Surfaces Using Laser Cladding Technique

Journal of Materials Engineering and Performance ◽

10.1007/s11665-016-2427-3 ◽

2016 ◽

Vol 26 (1) ◽

pp. 76-83 ◽

Cited By ~ 8

Author(s):

Mohammad Shahid Raza ◽

Manowar Hussain ◽

Vikash Kumar ◽

Alok Kumar Das

Keyword(s):

Metal Matrix Composite ◽

Composite Coating ◽

Matrix Composite ◽

Laser Cladding ◽

Metal Matrix ◽

Hard Metal ◽

Engineered Surfaces ◽

In Situ Production

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In-Situ Synthesis of Metal Matrix Composite Coating with Laser Melting-Solidifying Processes

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.313.139 ◽

2006 ◽

Vol 313 ◽

pp. 139-144 ◽

Cited By ~ 1

Author(s):

Lin Geng ◽

Qing Wu Meng ◽

Yan Bin Chen

Keyword(s):

Metal Matrix Composite ◽

Composite Coating ◽

Matrix Composite ◽

Metal Matrix ◽

High Energy ◽

Hexagonal Prism ◽

Laser Melting ◽

Dendrite Morphology ◽

Melting Pool

In order to improve wear resistance of titanium alloy, with pre-placed B4C and NiCrBSi powders on Ti-6Al-4V substrate, a process of laser melting-solidifying metal matrix composite coating was studied. The coating was examined using XRD, SEM and EDS. A good metal matrix composite coating was obtained in a proper laser process. There is a metallurgical interface bonding between the coating and the substrate. During laser melting-solidifying process, high energy of laser melted the pre-placed powders and a part of Ti-6Al-4V substrate, which made Ti extend into a melting pool. A reaction between Ti and B4C took place in the melting pool, which in-situ synthesized TiB2 and TiC reinforcements in the coating. The composite coating mainly consists of γ-Ni matrix, TiB2, TiC and CrB reinforcements. Microstructure of the reinforcements obtained using the laser melting-solidifying is not as same as that of reinforcements obtained using general producing methods. Due to high cooling rate of the melting pool, TiC nucleated primarily and grew up in dendrite morphology from undercooled liquid. Encircling TiC, TiB2 precipitated later and grew up in hexagonal prism morphology. TiC and TiB2 formed an inlaid microstructure.

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IN-SITU SYNTHETIC TiB2 PARTICULATE REINFORCED METAL MATRIX COMPOSITE COATING ON AA2024 ALUMINUM ALLOY BY LASER CLADDING TECHNOLOGY

Surface Review and Letters ◽

10.1142/s0218625x05007438 ◽

2005 ◽

Vol 12 (04) ◽

pp. 561-567 ◽

Cited By ~ 19

Author(s):

JIANG XU ◽

YIDE KAN ◽

WENJIN LIU

Keyword(s):

Aluminum Alloy ◽

Elastic Modulus ◽

Metal Matrix Composite ◽

Composite Coating ◽

Matrix Composite ◽

Laser Cladding ◽

Metal Matrix ◽

Surface Hardness ◽

Particulate Reinforced

In order to improve the wear resistance of aluminum alloy, in-situ synthesized TiB 2 and Ti 3 B 4 peritectic composite particulate reinforced metal matrix composite, formed on a 2024 aluminum alloy by laser cladding with a powder mixture of Fe -coated Boron, Ti and Al , was successfully achieved using 3-KW CW CO 2 laser. The chemical composition, microstructure and phase structure of the composite clad coating were analyzed by energy dispersive X-ray spectroscopy (EDX), SEM, AFM and XRD. The typical microstructure of the composite coating is composed of TiB 2, Ti 3 B 4, Al 3 Ti , Al 3 Fe and α- Al . The surface hardness of cladding coating increases with the amount of added Fe -coated B and Ti powder which determines the amount of TiB 2 and Ti 3 B 4 peritectic composite particulate. The nanohardness and the elastic modulus at the interface of the TiB 2 and Ti 3 B 4 peritectic composite particulate/matrix were investigated using the nanoindentation technique. The results showed that the nanohardness and the reduced elastic modulus from the peritectic composite particulate to the matrix is a gradient distribution.

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