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92 results on '"Ouyang, Jiahu"'

54. Inspired Square Micro-Texture Structures Designed by Nanosecond Laser Sculpture for Enhancing Adhesion Strength of Plasma Spraying Si-Hfo2 Bond Coat on Sic Substrates

Author

Wang, Yaming, primary, Yu, Shuang, additional, Wang, Yaming, additional, Wang, Shuqi, additional, Zhao, Qiang, additional, Li, Yang, additional, Ren, Dawei, additional, Chen, Guoliang, additional, Zou, Yongchun, additional, Ouyang, Jiahu, additional, Jia, Dechang, additional, and Zhou, Yu, additional

Published
2023
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71. Editorial

Author

Ouyang, Jiahu, primary, Pei, Yutao, additional, Wang, You, additional, Dong, Hanshan, additional, Rudolph, Henrik, additional, and Shao, Zhoujun, additional

Published
2019
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78. In situ reaction and solid solution induced hardening in (Ti,Zr)B2‐(Zr,Ti)C composites.

Author

Huo, Sijia, Wang, Yujin, Kong, Qingyi, Chen, Lei, Yao, Mianyi, Gu, Hui, Ouyang, Jiahu, Fu, Yudong, and Zhou, Yu

Subjects
SOLUTION strengthening, TITANIUM composites, FRACTURE toughness, HARDNESS, MICROSTRUCTURE, SOLID solutions, TEMPERATURE effect
Abstract

(Ti,Zr)B2‐(Zr,Ti)C ceramics were synthesized by reactive hot‐pressing and solid solution coupling effect using ZrB2 and TiC powders as starting materials. Effects of sintering temperature on phase relations, microstructure and mechanical properties were reported. The equimolar ZrB2 and TiC reactants ensured a complete in situ reaction to form (Ti,Zr)B2 and (Zr,Ti)C solid solutions. The (Ti,Zr)B2‐(Zr,Ti)C composite sintered at 1750°C was fully densified, and exhibited a high hardness of 29.1 GPa due to fine‐grain hardening and solid solution hardening. The optimized comprehensive mechanical properties such as a hardness of 27.9 GPa, a strength of 705 MPa and an indentation fracture toughness of 5.3 MPa m1/2 were achieved in (Ti,Zr)B2‐(Zr,Ti)C composites sintered at 1800°C for 1 hour. [ABSTRACT FROM AUTHOR]

Published
2020
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79. Foreword from the Editors

Author

Ouyang, Jiahu, primary, Somers, Marcel A.J., additional, Shao, Zhoujun, additional, Wang, You, additional, and Gao, Zhi, additional

Published
2018
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92. Influence of reactive melt infiltration parameters on microstructure and properties of low temperature derived Cf/ZrC composites

Author

Wang, Dong, Wang, Yujin, Rao, Jiancun, Ouyang, Jiahu, Zhou, Yu, and Song, Guiming

Subjects
*SEEPAGE, *MICROSTRUCTURE, *LOW temperatures, *ZIRCONIUM carbide, *COMPOSITE materials, *EVAPORATION (Chemistry)
Abstract

Abstract: Cf/ZrC composites were fabricated at temperatures of 1200–1400°C by reactive melt infiltration (RMI) using C/C as the preforms and Zr2Cu as the infiltrator. The effects of infiltration time and temperature on microstructure and properties of the composites were investigated. Results show that there was still un-reacted Zr2Cu left in the matrix when the reaction time was not long enough. ZrC grains coarsened and partial Cu evaporated when the time became longer. The infiltration time could be shortened as the infiltration temperature increased, whereas the morphology of ZrC changed from irregular polyhedra to octahedra with faceted surfaces. Composites prepared at 1200°C for 4h exhibit superior fracture work (∼103 J/m2) and ablation resistance. The linear ablation rate of the composites is 0.00024mm/s. Such a low value is attributed to the formation of a ZrO2 protective layer and the cooling mechanism via evaporation of residual Cu in the matrix. [Copyright &y& Elsevier]

Published
2013
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