Surface modification of hard alloy by Y ion implantation under different atmosphere

Wang, Shixing; Liu, Cong; Xiong, Bangshu; Tian, Xiubo; Yang, Shiqin

doi:10.1016/j.apsusc.2011.01.113

Cited by 13 publications

(8 citation statements)

References 13 publications

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“…Ion implantation is a modern material surface modification technology that has become increasingly common for changing the characteristics and properties of metal materials [14]. It can selectively improve the wear resistance, corrosion resistance, oxidation resistance, and fatigue resistance of the material surface by implanting a small amount of metal ions without changing the original properties of the material substrate [15,16,17]. In recent years, ion implantation of lanthanum and yttrium has been mainly focused on enhancing the corrosion resistance, high-temperature oxidation resistance, and biocompatibility of pure metals or alloys [18,19,20].…”

Section: Introductionmentioning

confidence: 99%

Study of the Catalytic Strengthening of a Vacuum Carburized Layer on Alloy Steel by Rare Earth Pre-Implantation

Cai-yun

Xing³

et al. 2019

Materials

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Conventional carburizing has disadvantages, such as high energy consumption, large deformation of parts, and an imperfect structure of the carburizing layer. Hence, a rare earth ion pre-implantation method was used to catalyze and strengthen the carburized layer of 20Cr2Ni4A alloy steel. In this study, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive microanalysis (EDS), transmission electron microscopy (TEM), and Rockwell/Vickers hardness testing were used to analyze the microstructure, phase composition, retained austenite content, hardness, carburized layer thickness, and carbon diffusion. The results showed that lanthanum and yttrium ions implanted into the 20Cr2Ni4A steel formed solid solutions of rare earth ions and a large number of dislocations, which improved the diffusion coefficient of carbon elements on the carburized surface and the uniformity of the carbon distribution. Simultaneously, rare earth ion implantation improved the structure and hardness of the vacuum carburized layer. Compared to the lanthanum ion implantation, yttrium ion implantation caused the structure of the carburized layer to be finer, and the carbon diffusion coefficient increased by 1.17 times; in addition, the surface hardness of the carburized layer was 61.8 HRC.

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Section: Introductionmentioning

confidence: 99%

Study of the Catalytic Strengthening of a Vacuum Carburized Layer on Alloy Steel by Rare Earth Pre-Implantation

Cai-yun

Xing³

et al. 2019

Materials

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“…The differences in the thickness of nitrided layers and nitrogen distributions between Sample A and Sample B are caused by the different energies of the nitrogen atoms which reach the surface of the samples. In the process of ion implantation, positive ions are developed by ionizing atoms, and accelerated by a high voltage field, and then thudded into the surface regions of solid materials [16]. Therefore, nitrogen atoms which reach the surface in the process of ion implantation have higher energy, and can rapidly diffuse into the interior of samples in seconds.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the resistance to corrosion of (Tb, Dy)Fe 2 alloy is improved considerably [14,15]. In this paper, microwave electron-cyclotron-resonance chemical vapor deposition (MW-ECR-CVD) [16] and ion implantation were used to conduct surface nitriding treatment, and the microstructure and properties of the nitrided layers were investigated.…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of Tb0.3Dy0.7Fe2 alloys modified by surface nitriding

Yang

Zhang

et al. 2014

Rare Met.

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The surface of Tb 0.3 Dy 0.7 Fe 2 alloys was modified by microwave electron-cyclotron-resonance chemical vapor deposition (MW-ECR-CVD) and ion implantation technology, respectively. The microstructure and corrosion resistance of nitrided layers were investigated by means of optical microscope (OM), X-ray diffractomer (XRD), auger electron spectroscopy (AES), and electrochemical workstation. After modified by MW-ECR-CVD, the nitrogen concentration of the nitrided layers decreases gradually with the depth increasing, while the nitrogen concentration modified by ion implantation process exhibits Gaussian distribution. The self-corrosion electric potential of the sample modified by ion implantation is higher than that modified by MW-ECR-CVD, which reveals that the samples modified by ion implantation process have a better resistance to corrosion. The magnetostrictions are assessed for the samples placed in the air for one year, which further confirms that the ion implantation process is more helpful to maintain the magnetostrictions.

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“…However, little work focused on the molten corrosion behavior of the Ni-based superalloy containing trace amounts of yttrium. Yttrium has been applied successfully in many fields such as metallurgy and chemical and surface engineering [8]. Some reports exist on yttrium modification in the nickel-base alloys [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

High-temperature corrosion behavior of Ni–16Mo–7Cr–4Fe superalloy containing yttrium in molten LiF–NaF–KF salt

Zhou

et al. 2015

Journal of Nuclear Materials

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Surface modification of hard alloy by Y ion implantation under different atmosphere

Cited by 13 publications

References 13 publications

Study of the Catalytic Strengthening of a Vacuum Carburized Layer on Alloy Steel by Rare Earth Pre-Implantation

Study of the Catalytic Strengthening of a Vacuum Carburized Layer on Alloy Steel by Rare Earth Pre-Implantation

Structure and properties of Tb0.3Dy0.7Fe2 alloys modified by surface nitriding

High-temperature corrosion behavior of Ni–16Mo–7Cr–4Fe superalloy containing yttrium in molten LiF–NaF–KF salt

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