Analysis of structure and microhardness of Al2O3-40 wt.% TiO2/NiCoCrAl gradient coating with in-situ needle-like phase reinforcement after high-temperature treatment

He, Xuan; Yuan, Xiaohu; Xu, Hao; Song, Peng; Yu, Xia; Li, Chao; Huang, Taihong; Li, Qiaolei; Lü, Kaiyue; Feng, Jing; Lu, Jian; Lu, Jiansheng

doi:10.1016/j.ceramint.2019.04.171

Cited by 13 publications

(3 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a ceramic coating, yttrium oxide coating can strengthen the corrosion resistance, wear resistance, thermal barrier and high temperature oxidation resistance of the metal substrate [1,2] , thereby increasing the service life of the metal substrate and expanding the scope of application. The metal matrix materials protected by ceramic coating also possess excellent properties of metals, such as high strength, high plasticity, electrical conductivity, etc., as well as excellent properties such as corrosion resistance, stability, high temperature oxidation resistance and hard texture of ceramic materials in the coating, so the materials combined by coating and matrix are suitable for many fields [3] .…”

Section: Introductionmentioning

confidence: 99%

Untitled

2024

DJNB

View full text Add to dashboard Cite

Y 2 O 3 coatings were fabricated on using atmospheric plasma spraying (APS). The effects of different process parameters on the microstructure and properties of the coating were analyzed. The results show that the overall morphology of Y 2 O 3 coatings are smooth at high spraying power, low spraying distance and low primary gas flow rate, which is consistent with the change trend of porosity and hardness. The minimum porosity of coating is about 1.4%. The roughness of coatings isn't sensitive to changes in parameters.Y 2 O 3 coatings have excellent corrosion resistance. The smaller the porosity of Y 2 O 3 coating, the better the corrosion resistance.

show abstract

Section: Introductionmentioning

confidence: 99%

Untitled

2024

DJNB

View full text Add to dashboard Cite

show abstract

“…During the cladding process, thermal stress is caused by the huge performance difference between the coating and the substrate, which makes the combination of the coating and the substrate poor [14].Therefore, gradient materials have become a key to solve the problem. In 1987, the Japanese Science and Technology Agency proposed "gradient functional materials" [15]. The design idea is to make the physical and chemical properties of coating gradually and continuously transition to avoid the abrupt change of performance from the substrate to the coating [16], alleviate the stress condition at the interface, improve the bonding condition between the coating interfaces so that the coating can obtain appropriate hardness, toughness and residual stress, so as to effectively inhibit the generation and expansion of cracks [17], improve the load-bearing capacity and anti-friction properties of the coating.In order to improve the service life of H13 hot work steel, cobalt-based coatings with a gradient effect were prepared on the surface of the H13 steel substrate, and the performance of the coatings was measured by the experiments.…”

mentioning

confidence: 99%

“…Therefore, gradient materials have become a key to solve the problem. In 1987, the Japanese Science and Technology Agency proposed "gradient functional materials" [15]. The design idea is to make the physical and chemical properties of coating gradually and continuously transition to avoid the abrupt change of performance from the substrate to the coating [16], alleviate the stress condition at the interface, improve the bonding condition between the coating interfaces so that the coating can obtain appropriate hardness, toughness and residual stress, so as to effectively inhibit the generation and expansion of cracks [17], improve the load-bearing capacity and anti-friction properties of the coating.…”

mentioning

confidence: 99%

Preparation of WC Reinforced Co-Based Alloy Gradient Coatings on a H13 Mold Steel Substrate by Laser Cladding

Yang

Wang

et al. 2020

Coatings

View full text Add to dashboard Cite

H13 die steel often fails as a result of physical and chemical effects such as wear, erosion and cyclic stress. Accordingly, the study evaluates Co-based gradient coating on an H13 steel featuring a stress-relieving effect. Scanning electron microscope and X-ray diffraction were used to analyze the microstructure and phase of the coatings. A microhardness tester and friction and wear tester were used to compare the hardness and wear resistance of the coatings and the substrate, and the wear morphology was observed. A pendulum impact test was used to compare the impact resistance of the coatings and the substrate, and the fracture morphology was observed. Finally, a corrosion test was used to compare the corrosion resistance of coatings and substrate. The results show that the Co-based gradient coatings have good combinations with the substrate, the hard phase content gradually increases from the bottom to the top of the coating, and the crystal microstructure generally maintains a distribution trend from coarse to fine. The hardness of the gradient coatings is significantly higher than the substrate, and from the coating surface to the substrate, the hardness decreases slowly. The wear loss of the coatings is much lower than that of the substrate, the main wear mechanism of the substrate is abrasive wear, and the main wear mechanism of the coatings is brittle spalling. While the gradient coatings increase the surface hardness, the brittleness also increases, the impact resistance of the coatings is lower than that of the substrate, the fracture form of the substrate is a ductile fracture, and the fracture form of the coating is a brittle fracture. The gradient coatings effectively improve the corrosion resistance of the substrate surface, and the higher the content of the reinforcing phase, the better the corrosion resistance of the coatings.Coatings 2020, 10, 176 2 of 13 the surface [6]. In other words, improving the surface microstructure and performance can effectively increase the service life of the mold. Therefore, the necessary surface strengthening measures for hot work molds are an important means to improve the service life of molds.Compared with other surface modification technologies, laser cladding technology has advantages not available in other methods. Not only can it obtain a coating with an ideal thickness, but also the metallurgical combination of the coating and the substrate has a high bonding strength, which can effectively improve the wear resistance and oxidation and corrosion resistance of the tool surface and has great application and development prospects [7]. In addition, the Stoney equation and some specific devices are proposed to be used in coatings characterization, which can detect and measure stresses on fine layers [8]. Present and future works must use these new ideas. The development of these theories and methods has further promoted the application of laser cladding technology.Laser cladding materials mainly include self-fluxing alloy materials, ceramic materials, and composi...

show abstract

Cyclic Oxidation and Diffusion-Controlled Performance of Ti2AlC MAX-Phase Produced by Spark Plasma Sintering

Ali

Song

Khan

et al. 2023

JOM

View full text Add to dashboard Cite

Analysis of structure and microhardness of Al2O3-40 wt.% TiO2/NiCoCrAl gradient coating with in-situ needle-like phase reinforcement after high-temperature treatment

Cited by 13 publications

References 54 publications

Untitled

Untitled

Preparation of WC Reinforced Co-Based Alloy Gradient Coatings on a H13 Mold Steel Substrate by Laser Cladding

Cyclic Oxidation and Diffusion-Controlled Performance of Ti2AlC MAX-Phase Produced by Spark Plasma Sintering

Contact Info

Product

Resources

About

Analysis of structure and microhardness of Al2O3-40 wt.% TiO2/NiCoCrAl gradient coating with in-situ needle-like phase reinforcement after high-temperature treatment

Cited by 13 publications

References 54 publications

Untitled

Untitled

Preparation of WC Reinforced Co-Based Alloy Gradient Coatings on a H13 Mold Steel Substrate by Laser Cladding

Cyclic Oxidation and Diffusion-Controlled Performance of Ti2AlC MAX-Phase Produced by Spark Plasma Sintering

Contact Info

Product

Resources

About

Analysis of structure and microhardness of Al2O3-40 wt.% TiO2/NiCoCrAl gradient coating with in-situ needle-like phase reinforcement after high-temperature treatment