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393 results on '"Zhu, Yingli"'

106. In Situ ZrB 2 Formation in B 4 C Ceramics and Its Strengthening Mechanism on Mechanical Properties.

Author

Yao, Wankai, Yan, Junbing, Li, Xiangcheng, Chen, Pingan, Zhu, Yingli, and Zhu, Boquan

Subjects
VICKERS hardness, FLEXURAL strength, FRACTURE toughness, CERAMICS, GRAIN size, RAW materials
Abstract

In order to reduce the sintering temperature and improve the mechanical properties of B4C ceramics, ZrB2 was formed in situ using the SPS sintering method with ZrO2 and B4C as raw materials. Thermodynamic calculations revealed that CO pressure affected the formation of ZrB2 at temperatures from 814 °C to 1100 °C. The experimental results showed that the ZrB2 grain size was <5 µm and that the grains were uniformly distributed within the B4C ceramics. With an increase in ZrO2 content, the Vickers hardness and flexural strength of the B4C ceramics first increased and then decreased, while the fracture toughness continuously increased. When the content of ZrO2 was 15 wt%, the Vickers hardness, fracture toughness and flexural strength of B4C ceramics were 35.5 ± 0.63 GPa, 3.6 ± 0.24 MPa·m1/2 and 403 ± 10 MPa, respectively. These results suggest that ZrB2 inhibits B4C grain growth, eliminates crack tip stress, and provides fine grain to strengthen and toughen B4C ceramics. [ABSTRACT FROM AUTHOR]

Published
2022
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110. Sintering densification of boron carbide materials and their application research progress.

Author

Zou Xin, Chen Ping'an, Xu Guangping, Li Xiangcheng, Zhu Yingli, Zhu Boquan, and Naihuo Cailiao

Subjects
BORON carbides, ISOSTATIC pressing, SINTERING, HOT pressing, LIGHTWEIGHT materials, MICROWAVE sintering, MELTING points
Abstract

Boron carbide (B4C) has excellent high-temperature oxidation resistance, high hardness, low density, high melting point and excellent abrasive resistance, which is widely used in fields such as refractories, wear-resistant materials and lightweight protective materials. The research progress and the application of B4C materials in China and at abroad in recent years were summarized. The influences of sintering processes (pressureless sintering, hot pressing sintering, hot isostatic pressing sintering, spark plasma sintering and microwave sintering) and sintering additives (simple substances, oxides and carbides) on the B4C densification were analyzed. The development of B4C materials was prospected. [ABSTRACT FROM AUTHOR]

Published
2022
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111. Characteristics of Robust Mesoscale Eddies in the Gulf of Mexico.

Author

Zhu, Yingli and Liang, Xinfeng

Subjects
EDDIES, OCEAN temperature, COMPUTER algorithms, LOOP Current
Abstract

Although numerous studies on mesoscale eddies in the Gulf of Mexico (GoM) have been conducted, a comprehensive study on their temporal and spatial characteristics is still lacking. In this study, we combine three eddy detection algorithms to detect eddies from the 26-year sea surface height record in the GoM and examine their characteristics. We find distinct characteristics between Loop Current Eddies (LCEs), Loop Current Frontal Eddies (LCFEs), and mesoscale eddies that are not directly related to the Loop Current (LC). Seasonal variability appears in both the LCFEs and non-LCFE cyclonic eddies and shows large uncertainties. More specifically, more LCFEs are formed in January to July than in August to December, likely related to the seasonal variation of the northward penetration of the LC. And the formation of non-LCFE cyclonic eddies shows a biannual variability, which could be linked to the position and strength of the background current in the western GoM. Low-frequency (interannual to multidecadal) variability is also detected. In the eastern GoM, the extent of northward penetration of the LC can affect the generation of LCFEs and result in low-frequency variations. In the western GoM, the low-frequency variability of eddy occurrence and amplitude could be related to the surface circulation strength. This study can serve as an up-to-date reference for eddy-related investigations in the GoM. [ABSTRACT FROM AUTHOR]

Published
2022
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122. Network pharmacology-based approach to investigate the mechanisms of Shenqi Fuzheng injection in the treatment of breast cancer

Author

Liu, Shuyu, primary, Wu, Jiarui, additional, Zhu, Yingli, additional, Zhou, Wei, additional, Liu, Xinkui, additional, Fu, Changgeng, additional, Ding, Zhiguo, additional, Xu, Lishan, additional, Zhang, Ying, additional, Meng, Ziqi, additional, Ni, Mengwei, additional, Jia, Shanshan, additional, Zhang, Jingyuan, additional, and Guo, Siyu, additional

Published
2020
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149. Effects of cytochrome P450 3A4 and non-genetic factors on initial voriconazole serum trough concentrations in hematological patients with different cytochrome P450 2C19 genotypes

Author

Shao, Beibei, primary, Ma, Yongcheng, additional, Li, Qiaoyan, additional, Wang, Yimeng, additional, Zhu, Zunmin, additional, Zhao, Hongwei, additional, Sun, Jun, additional, Dong, Lingfang, additional, Zhu, Yingli, additional, Zhao, Ningmin, additional, and Qin, Yuhua, additional

Published
2017
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