Achieving enhanced toughness of a nanocomposite coating by lattice distortion at the variable metallic oxide interface

Zhang, Zhen; Yang, Zehui; Qian, Weixing; Chen, Yongnan; Xu, Yiku; Xu, Xiaoyan; Zhao, Qinyang; Li, Hongzhan; Zhang, Yongqing; Zhan, Haifei

doi:10.1016/j.matdes.2022.111316

Cited by 12 publications

(3 citation statements)

References 44 publications

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“…Of these, t-ZrO 2 was the major constituent of the ZrO 2 , m-ZrO 2 was the supporting component, and the content of c-ZrO 2 was minimal, almost negligible. This discovery supports the findings of Zhang et al [24], who observed that the ZrO 2 /MgO MAO coating contained mainly m-ZrO 2 and t-ZrO 2 crystal structures. Samples Y2-Y4 were found to have an MAO coating primarily composed of c-ZrO 2 , t-ZrO 2 , m-ZrO 2 , MgO, Y 2 O 3 , and MgF 2 .…”

Section: Phase Analysis Of Mao Coatingsupporting

confidence: 92%

The Effect of Yttrium Nitrate Content on the Microstructure and Properties of a Micro-Arc Oxidation Coating Prepared on a ZK61M Magnesium Alloy

Li,

Wang,

Geng

et al. 2023

Coatings

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To investigate the effect of the content of yttrium nitrate on the microstructure and properties of micro-arc oxidation coatings on a ZK61M magnesium alloy, this study successfully prepared a ZrO2-Y2O3-containing composite ceramic coating on a ZK61M magnesium alloy by using micro-arc oxidation (MAO) technology, adding different amounts of yttrium nitrate (0 g/L, 0.15 g/L, 0.45 g/L, and 0.75 g/L) to a zirconate electrolyte with the main components of 6 g/L of (NH4)2ZrF6, 4 g/L of NaH2PO4, 1 g/L of NaF, and a pH value of 7.5–8.0. The microstructure, phase composition, corrosion resistance, and friction coefficient of the coating were investigated using a scanning electron microscope, an energy spectrometer, an X-ray diffractometer, a photoelectron spectrometer, an electrochemical tester, and a friction and wear tester, respectively. The results showed that the composite ceramic coating was composed of c-ZrO2, t-ZrO2, m-ZrO2, MgO, Y2O3, and MgF2. Among the MAO coatings prepared in this experiment, it was when the concentration of the Y(NO3)3 was 0.75 g/L that the coating exhibited the best corrosion resistance and wear resistance. The corrosion current density (Icorr) was 1.415 × 10−8 A·cm−2, which was four orders of magnitude lower than that of the substrate. The friction coefficient and wear volume of the coating were reduced by 30.77% and 96.55% compared to the substrate, respectively.

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Section: Phase Analysis Of Mao Coatingsupporting

confidence: 92%

The Effect of Yttrium Nitrate Content on the Microstructure and Properties of a Micro-Arc Oxidation Coating Prepared on a ZK61M Magnesium Alloy

Li,

Wang,

Geng

et al. 2023

Coatings

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“…24 ) manifest substantial variations in interplanar spacing values and their corresponding ratios between the NaYF 4 and NaLuF 4 crystals. These observations suggest the presence of lattice distortion at the interface 31 . A geometric phase analysis of the high-resolution TEM image of a single core@shell@shell NP was employed to visualize the strain distribution 22 , 32 .…”

Section: Resultsmentioning

confidence: 78%

Dual heterogeneous interfaces enhance X-ray excited persistent luminescence for low-dose 3D imaging

Lei,

Yi,

Wang

et al. 2024

Nat Commun

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Lanthanide-doped fluoride nanoparticles (NPs) showcase adjustable X-ray-excited persistent luminescence (XEPL), holding significant promise for applications in three-dimensional (3D) imaging through the creation of flexible X-ray detectors. However, a dangerous high X-ray irradiation dose rate and complicated heating procedure are required to generate efficient XEPL for high-resolution 3D imaging, which is attributed to a lack of strategies to significantly enhance the XEPL intensity. Here we report that the XEPL intensity of a series of lanthanide activators (Dy, Pr, Er, Tm, Gd, Tb) is greatly improved by constructing dual heterogeneous interfaces in a double-shell nanostructure. Mechanistic studies indicate that the employed core@shell@shell structure could not only passivate the surface quenchers to lower the non-radiative relaxation possibility, but also reduce the interfacial Frenkel defect formation energy leading to increase the trap concentration. By employing a NPs containing flexible film as the scintillation screen, the inside 3D electrical structure of a watch was clearly achieved based on the delayed XEPL imaging and 3D reconstruction procedure. We foresee that these findings will promote the development of advanced X-ray activated persistent fluoride NPs and offer opportunities for safer and more efficient X-ray imaging techniques in a number of scientific and practical areas.

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“…It was reported recently that a dual-phase structure with coherent interfaces can facilitate a stress-induced phase transformation to generate plastic deformability in nitrides. Coherent or semi-coherent interfaces between an oxide and martensitic phase transformation component can provide a channel for stress transfer and consequently induce phase transformation without impairing interfacial bonding, leading to enhanced fracture toughness . The martensitic transformation at the phase boundaries allows atoms to change their locations collectively and spread out the mechanical stress, thus preventing stress concentration and crack initiation.…”

Section: Discussionmentioning

confidence: 99%

Toughening Ceramic-Based Composites by Homogenizing the Lattice Strain at Phase Boundaries

Jiang

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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Ceramic-based composites generally have low fracture toughness, and toughening these materials without sacrificing their hardness has been a big challenge. This study presents an approach for toughening ceramic-based composites by modulating the strain partition and stress distribution in phase-boundary regions. A new concept of homogenizing the lattice strain to achieve high fracture toughness in ceramic-based composites is proposed based on the collective lattice shear of martensitic phase transformation. The strategy was demonstrated by ZrO2-containing WC–Co ceramic–metal composites as a prototype. The crystal planes along the WC/ZrO2 martensitic transforming phase boundaries exhibited significantly larger and uniform lattice strains compared with conventional dislocation pile-up phase boundaries with highly localized lattice strains. The homogeneous strain and stress distributions across interfaces enabled the composite to have simultaneously high fracture toughness and hardness. The “homogenizing the lattice strain” strategy proposed in this work is applicable to a broad range of ceramic-based composites to achieve superior comprehensive mechanical properties.

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Achieving enhanced toughness of a nanocomposite coating by lattice distortion at the variable metallic oxide interface

Cited by 12 publications

References 44 publications

The Effect of Yttrium Nitrate Content on the Microstructure and Properties of a Micro-Arc Oxidation Coating Prepared on a ZK61M Magnesium Alloy

The Effect of Yttrium Nitrate Content on the Microstructure and Properties of a Micro-Arc Oxidation Coating Prepared on a ZK61M Magnesium Alloy

Dual heterogeneous interfaces enhance X-ray excited persistent luminescence for low-dose 3D imaging

Toughening Ceramic-Based Composites by Homogenizing the Lattice Strain at Phase Boundaries

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