Thermal conductivity and wear resistance of cold sprayed Cu-ceramic phase composite coating

Chen, Qin; Yu, Mei; Cao, Kai; Chen, Hui

doi:10.1016/j.surfcoat.2022.128135

Cited by 35 publications

(4 citation statements)

References 38 publications

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“…In this particular instance, factors such as porosity, which can be mitigated through hightemperature sintering, phase formation, size of crystal grains, and the presence of microstructural defects such as voids and cracks all have an impact on the overall thermal conductivity. These factors are affected by different processing conditions, with the thickness of the coating being particularly critical [57]. Other factors impacting conductivity include internal closed pores hindering surface contact between granules, as well as heat treatment aiding in enhancing the melting of cold fuses [58].…”

Section: Thermal Conductivity Testmentioning

confidence: 99%

Production of a double cermet coating to treatment of the turbine blades

Antar,

Darweesh,

Ridha

2024

Eng. Res. Express

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Turbine blades often experience external failures, such as cracks and high pores, during operation. To address these issues, a method known as thermal spraying by flame is employed to apply cermet materials consisting of metal and ceramics onto the blades. The process involved incorporating manganese (Mn) into a chromium oxide (Cr2O3) base in varying proportions (3,6,9,12,15)%. Prior to this, the two mixtures underwent several preparatory steps, including being mixed with a micro-mill for two hours and then dried at 80°C for thirty minutes to remove any moisture present in the laboratory. The coating bases were prepared from an out-of-service turbine bit and shaped into squares with a side length of 1cm. The bases were then roughened and indented using a paint gun. The resulting models were sintered at a temperature of 1000°C for two hours. A number of structural and physical tests were carried out for the painted models before and after thermal sintering. Scanning electron microscope tests revealed crystalline regularity and lattice consistency of the outer surface especially at 15%Mn. Regarding the findings of the actual density, it was observed that the inclusion of manganese leads to a gradual enhancement in density with each subsequent addition. However, there was a consistent decrease in real porosity and water absorption, resulting in lower values at 15%. The hardness and adhesion strength exhibited significant improvements, increasing by approximately 15%. Conversely, the addition of the stiffener led to a continuous decrease in thermal conductivity. Thus, it was determined that the optimal coating parameters for achieving favorable outcomes were a coating distance of 16cm, a coating angle of 90°, and thermal sintering at 1000°C.

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Section: Thermal Conductivity Testmentioning

confidence: 99%

Production of a double cermet coating to treatment of the turbine blades

Antar,

Darweesh,

Ridha

2024

Eng. Res. Express

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“…A significant advantage of laser cladding lies in its ability to rapidly produce cladding layers with varying thicknesses and compositions. However, determining the effective thermal conductivity under different material thicknesses necessitates a substantial number of samples and experiments [13]. While past research on laser cladding has primarily focused on enhancing mechanical and wear properties, the evaluation and prediction of thermal conductivity in laser-clad composites has received relatively limited attention [14].…”

Section: Introductionmentioning

confidence: 99%

Analyses and Research on a Model for Effective Thermal Conductivity of Laser-Clad Composite Materials

Li,

Lin,

Murengami

et al. 2023

Materials

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Composite materials prepared via laser cladding technology are widely used in die production and other fields. When a composite material is used for heat dissipation and heat transfer, thermal conductivity becomes an important parameter. However, obtaining effective thermal conductivity of composite materials prepared via laser cladding under different parameters requires a large number of samples and experiments. In order to improve the research efficiency of thermal conductivity of composite materials, a mathematical model of Cu/Ni composite materials was established to study the influence of cladding-layer parameters on the effective thermal conductivity of composite materials. The comparison between the model and the experiment shows that the model’s accuracy is 86.7%, and the error is due to the increase in thermal conductivity caused by the alloying of the joint, so the overall effective thermal conductivity deviation is small. This study provides a mathematical model method for studying the thermodynamic properties of laser cladding materials. It provides theoretical and practical guidance for subsequent research on the thermodynamic properties of materials during die production.

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“…Al 2 O 3 ceramics are widely used in aerospace, electronics, automobile, energy, and other fields because of their lightweight, high hardness, corrosion resistance, and excellent thermal stability. [1][2][3] Energy and environmental problems have become increasingly serious in recent years, and the application of ceramic materials in manufacturing automotive parts has effectively promoted the development of lightweight automotive technology, improved fuel economy, and reduced carbon emissions. 4,5 Al 2 O 3 ceramics are difficult to process into complexshaped components because of their brittleness, limiting their engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Releasing the residual stress of Al₂O₃/304 stainless steel joint by introducing BN into Ag‐Cu‐Ti filler metal

Tao,

Haitao,

Xianming

et al. 2023

Int J Applied Ceramic Tech

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Owing to the native character of the coefficient of thermal expansion (CTE) mismatch between Al2O3 and 304 stainless steel, obtaining high strength for Al2O3/304 stainless steel joints remains challenging. In this study, the residual stress of an Al2O3/304 stainless steel brazed joint was relieved using the Ag‐Cu‐Ti + boron nitride (BN) composite filler. The results indicated that the elements between the filler and base metals on both sides were mutually diffused. Moreover, reaction layers formed at the interface, connecting the Al2O3 ceramic and 304 stainless steel. The microstructure of the joint was as follows: Al2O3/Cu3Ti3O + TiCu/Ag (s, s) + Cu (s, s) + TiN + TiB2 + TiCu/Cu0.8Fe0.2Ti/TiFe2/Fe‐Cr/304 stainless steel. When the .1 wt% BN was added, the average strength of the joint reached 151 ± 10 MPa, 15% higher than the average strength of the joint only using Ag‐Cu‐Ti filler (131 ± 9 MPa). The improvement in the shear strength and reduction in the residual stress was attributed to the formation of TiN and TiB2, reducing the CTE difference and refining the microstructure.

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Thermal conductivity and wear resistance of cold sprayed Cu-ceramic phase composite coating

Cited by 35 publications

References 38 publications

Production of a double cermet coating to treatment of the turbine blades

Production of a double cermet coating to treatment of the turbine blades

Analyses and Research on a Model for Effective Thermal Conductivity of Laser-Clad Composite Materials

Releasing the residual stress of Al₂O₃/304 stainless steel joint by introducing BN into Ag‐Cu‐Ti filler metal

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Thermal conductivity and wear resistance of cold sprayed Cu-ceramic phase composite coating

Cited by 35 publications

References 38 publications

Production of a double cermet coating to treatment of the turbine blades

Production of a double cermet coating to treatment of the turbine blades

Analyses and Research on a Model for Effective Thermal Conductivity of Laser-Clad Composite Materials

Releasing the residual stress of Al2O3/304 stainless steel joint by introducing BN into Ag‐Cu‐Ti filler metal

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Product

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About

Releasing the residual stress of Al₂O₃/304 stainless steel joint by introducing BN into Ag‐Cu‐Ti filler metal