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1,383 results on '"Cui, Hongzhi"'

1. Large low-field magnetocaloric response in a ferromagnetic gadolinium orthophosphate

Author

Yang, Ziyu W., Zhang, Jie, Pi, Maocai, Ye, Xubin, Kang, Chenxu, Weng, Xiaoliang, Tang, Wei, Cui, Hongzhi, Zeng, Yu-Jia, and Long, Youwen

Subjects
Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons
Abstract

Bulk magnetic and thermodynamic measurements, along with mean-field calculations, were conducted on the ferromagnetic K3Gd5(PO4)6 powders. No magnetic ordering was observed until 2 K, while the application of an external field B > 1 T resulted in the splitting of the Gd3+ ground state multiplet and induced a non-cooperative Schottky effect. The average nearest-neighbor exchange strength |J1/kB| is determined to be 0.017 K, which leads to a remarkably large low field magnetic entropy change {\Delta}Sm = 36.2 J kg-1 K-1 under applied field change B = 2 T at temperature T = 2 K, as well as a maximum adiabatic temperature change Tad = 10.9 K. We contend that ferromagnetic gadolinium orthophosphates serve as a promising reservoir for exploring advanced magnetic refrigerants applicable under low magnetic fields., Comment: 7 pages, 5 figures

Published
2024

5. Corrosion and cracking behavior of high strength steel covered with high-velocity oxygen-fuel spraying WC coating in marine environment

Author

SHEN Minglu, ZHAO Lianhong, HE Weiping, CUI Zhongyu, and CUI Hongzhi

Subjects
wc coating, marine corrosion, fatigue life, fracture mechanism, failure, residual stress, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

In order to explore the adaptability and failure mechanism of landing gear materials for amphibious aircraft in the marine environment. By preparing a high-speed flame sprayed WC coating on the surface of hot-rolled 300M high-strength steel, the corrosion behavior of the coating in an artificial seawater environment was studied using electrochemical testing, salt spray testing, tensile testing, fatigue testing, and characterization by SEM, EDS, XRD, and CLSM. The research results indicate that the WC coating undergoes significant passivation and exhibits good corrosion resistance in an artificial seawater environment with pH value 8.2, which is related to the passivation of Co in the coating under alkaline conditions. The long-term electrochemical impedance results indicate that the corrosion resistance of the coating increases after soaking for 28 days, which is related to the oxide formed by the surface binder. Compared with the 300 M substrate, the tensile strength of the sprayed material slightly increases, which is related to the residual stress releasing inside the coating. Its cracking in artificial seawater is mainly controlled by the anodic dissolution process. As the pre corrosion time increases, the fatigue life of the material significantly decreases. The corrosive medium from the environment enters the interior of the coating during the pre corrosion process, which increases the number of defects, causes premature failure of the coating, and leads to an increase in material fracture sensitivity. WC coatings have good corrosion resistance, and the release of residual stress during the tensile process slightly increases the tensile strength of the material. The coating fails prematurely after pre corrosion, which results in a reduced fatigue life of the material.

Published
2024
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6. Key Technologies for the Safe Construction of Underwater Super Large Diameter Shield Tunnels: A Case Study

Author

Bao, Xiaohua, Shen, Jun, Chen, Xiangsheng, Wu, Xianlong, Cui, Hongzhi, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Cui, Zhen-Dong, Series Editor, Wu, Wei, editor, Leung, Chun Fai, editor, Zhou, Yingxin, editor, and Li, Xiaozhao, editor

Published
2024
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