Article
Materials Science, Multidisciplinary
Diao-Feng Li, Chun-Guang Bai, Zhi-Qiang Zhang, Hui-Bo Zhang, Nan Li, Jian Zhao
Summary: A novel compliant spinal fixation based on compliant mechanisms is designed to effectively reduce stress-shielding effect and adjacent segment degeneration (ASD), but it requires high properties of the used materials. Bulk metallic glasses (BMGs), as young biomaterials, demonstrate excellent comprehensive properties, making them attractive for compliant spinal fixation. In this study, the large deflection deformation behaviors of Zr61Ti2Cu25Al12 (at.%, ZT1) BMG beam were systematically investigated, including elastic, yielding, and plastic deformations. The theoretical nonlinear analytical solution curve predicts the load-deflection relation within the elastic deformation regime and assists in capturing the yielding event, serving as a powerful design tool for engineers. To accurately capture the beginning of the yielding event in biomedical implant applications, the concept of bending proof strength (sigma p,0.05%) with tiny permanent strain of 0.05% was proposed and determined, which is significant for setting the allowable operating limits of the basic flexible elements. The plastic deformation driven by the bending moment can be classified into two stages: the initial stage characterized by nucleation and intense interaction of shear bands, and the second stage dominated by the progressive propagation of shear bands and emergence of shear offsets. The plasticity of BMG beam structures depends on the BMG's inherent plastic zone size (rp), and when the half beam thickness is less than that of rp, the plastic deformation of BMGs behaves in a stable manner, effectively serving as the margin of safety.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Shaofei Ren, Xiaolong Bai, Sheng Liu, Mingyue Sun, Bin Xu, Chuanyong Cui
Summary: The interface healing mechanism of fine-grained Ni-Co-based superalloy during hot-compression bonding is investigated, and it is found that the defects in the primary gamma' and the bulge of the interface grain boundaries play a crucial role in the interface healing.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Dewang Cui, Ziqi Cao, Kun He, Yuanming Li, Xi Qiu, Guang Ran
Summary: This study investigates the interaction and ratio effect of hydrogen and helium on the irradiation behavior of nuclear materials. It is found that the addition of H atoms promotes the nucleation of dislocation loops and bubbles, and the size and density of these defects increase with the increase of H-He ratio. The final saturation size of bubbles also increases with the increase of H-He ratio. It is also discovered that the swelling is affected by H concentrations, with higher concentrations slowing down the increase in swelling.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Jiajun Li, Qianqian Zhu, Jiahui Zhu, Yuhang Cheng, Zirui Jia, Feng Lu, Chao Wang, Guanglei Wu
Summary: To solve the problem of electromagnetic pollution, a three-dimensional pyrolytic branched hollow architecture carbon/molybdenum disulfide (PBHAC/MoS 2 ) composite was prepared. The composite exhibited optimized impedance matching and multiple loss mechanisms, resulting in excellent electromagnetic wave absorption performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Yu Ding, Haiyang Yu, Meichao Lin, Michael Ortiz, Senbo Xiao, Jianying He, Zhiliang Zhang
Summary: This study reveals the hydrogen segregation energy spectrum at the grain boundaries of polycrystalline nickel and determines the equilibrium hydrogen concentrations. The identified structures exhibit different behaviors in hydrogen segregation and diffusion, providing implications for practical applications.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Review
Materials Science, Multidisciplinary
Jinguo Li, Jingxia Sun, Jinlai Liu, Xiaofeng Sun
Summary: This review comprehensively collates the available information on TCP phases in SX superalloys based on the latest findings. The thermodynamics and kinetics of TCP phase precipitation are introduced, and the morphology, composition, orientation, and sequential transformation of TCP phases are summarized in detail. Factors affecting the precipitation of these phases are sorted out, and the proposed damage mechanisms of TCP phases are listed. Finally, several control and prediction methods of TCP phase precipitation are reviewed to help alloy designers better balance the relationship between microstructure stabilities and properties of the superalloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
G. Acero, H. Moreno, P. P. Ortega, M. A. Ramirez, M. A. Ponce, F. Moura, A. Z. Simoes
Summary: This research investigates the domain structure of BaBiO3 thin films obtained by the polymeric precursor method and reveals the influence of bismuth and oxygen vacancies, grain morphology, and stoichiometric changes on the piezo-ferroelectric coupled behavior. The highly textured BBO55 film shows superior piezoelectric and ferroelectric responses compared to BBO37 and BBO82, making it a promising lead-free material for electronic components.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Materials Science, Multidisciplinary
Samuel Guemou, Liuting Zhang, Shuai Li, Yiqun Jiang, Tao Zhong, Zichuan Lu, Ren Zhou, Fuying Wu, Qian Li
Summary: A novel Ni-Nb/rGO nanocomposite catalyst was prepared and shown to exhibit exceptional catalytic effect in improving the sorption properties of magnesium hydride (MgH2). The composite catalyst significantly reduced the desorption temperature of MgH2, increased the hydrogen release capacity, and enabled hydrogen absorption even at room temperature. The addition of the composite catalyst was found to enhance the sorption kinetics and cycling property of MgH2.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Zehao Li, Guanlin Li, Xinyu Wang, Zheng Zhao
Summary: Electrical stimulation can restore motor function after spinal cord injury, but traditional intraspinal electrical stimulation has many disadvantages. This study developed a novel piezoelectric hydrogel that does not require an external power source or implantation of electrodes. The hydrogel significantly enhanced motor functional recovery of spinal cord injury and accelerated spinal cord healing, neurogenesis, axon regrowth, synapse formation, and remyelination.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Jingjing Zhang, Yue Zhao, Kezhen Qi, Shu-yuan Liu
Summary: CuInS2 quantum-dot-modified g-C3N4 catalysts (CIS/CN) were prepared using an in-situ growth process and evaluated for their photocatalytic activity. The optimized sample showed significantly enhanced photocatalytic properties, attributed to increased light absorption, more effective charge transfer, and reduced charge carrier recombination.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Ningyu Li, Yongqin Chang, Mingyang Li, Yuxiang Chen, Xinrui Luo, Shichao Pei, Fan Yang
Summary: A new strategy is proposed to overcome the strength-ductility tradeoff of copper alloys by introducing bimodal grain structures. Cu-Ta alloys with 0.5 at.% Ta content were prepared and the microstructural characterizations revealed the presence of ultra-fine equiaxed grains with uniformly dispersed Ta precipitates. The introduction of bimodal grain structures significantly enhanced the strength and elongation of the alloys. The Cu-0.5 at.% Ta alloys exhibited excellent thermal stability and softening resistance, making them potentially valuable for future fusion reactors.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Wenji Song, Dengzhi Wang, Congwen Tang, Pengfei Sun, Jiaxing Yang, Zhidong Xu, Tao Lai, Jianqiang Gong, Qianwu Hu, Xiaoyan Zeng
Summary: Tungsten particle-reinforced nickel-based composites were fabricated using laser-direct energy deposition (L-DED). The influence of the particle size on the microstructure and mechanical properties of the samples was systematically studied. The results showed that refining the particle size improved the mechanical properties and provided a theoretical basis.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Liangliang Zhang, Honggang Dong, Peng Li, Baosheng Wu, Yueting Ma, Libing Huang, Chao Li, Jiachen Li
Summary: This study aims to replace Ni-based alloy with TiAl intermetallic in assemblies. The quantitative relationship between lattice distortion, grain boundary, dislocation density, and the mechanical properties of the joints were investigated. The results showed that by using TiAl intermetallic, higher shear strength and improved performance of the joints were achieved.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Yaofeng Luo, Yan Wang, Li Wang, Bin Liu, Yong Liu
Summary: Dynamic recrystallization (DRX) is of great significance for the thermomechanical processing and microstructural regulation of TiAl intermetallics. In this study, an Avrami kinetics model for DRX was established, which was capable of predicting the DRX fraction accurately. The effect of Al2O3 short fiber on the DRX mechanisms of TiAl matrix composite during isothermal compression was investigated for the first time.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Fei Huang, Jiyong Hu, Xiong Yan
Summary: This study reports a new structure of double-threaded conductive yarn with rhythmic strain distribution, which can significantly widen the linear strain range of microcrack-based stretchable strain sensors. By integrating heterogeneous materials, the mechanical hysteresis of composite yarns is greatly reduced. The flexible strain sensor prepared using this structure has advantages such as a wide linear strain range, high sensitivity, low hysteresis, and rapid response, making it suitable for monitoring human body motion in flexible wearable devices.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Letter
Materials Science, Multidisciplinary
Huabei Peng, Liqiu Yong, Gaixia Wang, Jiazhen Yan, Bing Xu, Yuhua Wen
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Tianxu Zheng, Yaobo Hu, Chao Zhang, Tianshuo Zhao, Bin Jiang, Fusheng Pan, Aitao Tang
Summary: The aim of this study was to elucidate the underlying mechanism involved in the formation of rare earth texture and pseudo fiber bimodal microstructure in a high ductility Mg-2Gd-0.4Zr alloy. The research found that the rare earth texture emerged during the dynamic recrystallization process and was further strengthened during subsequent static recrystallization and grain growth processes. The delayed nucleation and growth of grains in the streamline region of Zr particles led to the formation of a pseudo fiber bimodal microstructure in the extruded Mg-2Gd-0.4Zr alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Xingde Zhang, Yihui Jiang, Fei Cao, Tian Yang, Fan Gao, Shuhua Liang
Summary: A dual-scale hybrid HfB2/Cu-Hf composite with HfB2 microparticles and Cu5Hf nanoprecipitates was prepared, and its contribution to mechanical properties and high-temperature performances was studied. The hybrid structure showed improved strain distribution and strength due to the pinning effect of HfB2 particles and strengthening effect of Cu5Hf nanoprecipitates. Both nanoprecipitates and HfB2 particles contributed to the high-temperature performance, with nanoprecipitates affecting the strength and HfB2 particles inhibiting grain coarsening and maintaining high-density dislocations.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Bin Zhang, Yunxia Sun, Tuo Liang, Yunzhen Li, Tian Li, Jingchao Wang, Ruiru Cai, Changlin Yang
Summary: Age hardening was used to optimize the mechanical properties of Mg-based materials, but it often resulted in a tradeoff between strength and ductility. This study achieved high strength-ductility synergy in AlN/AZ91 composites through optimized aging processes. The addition of AlN particles during extrusion induced dislocations and provided nucleation sites for precipitates. The high density of nano-sized precipitates resisted dislocation motion, leading to high yield strength. Moreover, the texture evolution and slip trace analysis showed enhanced activity of slip and reduced dislocation density, resulting in higher elongation to fracture.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Yilin Zhang, Yujing Zhang, Yuping Li, Xuefei Miao, Yanyan Shao, Chuyang Liu, Feng Xu
Summary: In this study, a novel magnetic composite consisting of SmCo5 and Sm2Co17 was developed using a reduction diffusion method. The micromorphology and binary phase ratios of the composite could be easily controlled by adjusting the reactant concentrations. The composite exhibited excellent microwave absorption properties at a thickness of 2.0 mm, attributed to its adjustable magnetic phases and distinctive particle shape.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
