Microstructure, mechanical and thermionic emission properties of a directionally solidified LaB6-VB2 eutectic composite
Microstructure, mechanical and thermionic emission properties of a directionally solidified LaB6-VB2 eutectic composite
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定向凝固LaB6-VB2共晶复合材料的微观结构、力学和热电子发射性能
DOI:
10.1016/j.matdes.2017.07.069
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发表时间:
2017-11
影响因子:
8.4
通讯作者:
Yang XY
中科院分区:
文献类型:
--
作者:
Yang Xinyu;Wang Pan;Wang Zhenghong;Hu Ke;Cheng Hefa;Li Zhi;Zhang Jiuxing;Yang XY
The directionally solidified (DS) LaB6-VB2eutectic composite is successfully prepared by the optical floating zone technique. The effect of solidification rate on the microstructure characteristic, mechanical and thermionic properties are investigated. DS LaB6-VB2eutectic composite presents a mixed rod and lamellar microstructures as the solidification rate is increased from 8.3 to 55.6 μm/s, and the formation of rod structure is ascribed to the necking of unstable lamellar. The fracture toughness in transverse section is higher than that in longitudinal section at the same rate, and the highest fracture toughness of 7.23 MPa·m1/2in transverse section and 6.47 MPa·m1/2in longitudinal section are obtained at V = 27.8 μm/s. Thermionic emission of DS LaB6-VB2eutectic composite obeys the Longo theory, and the optimal current density of 51.92 A·cm− 2is measured at 1873 K.
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影响因子:
6.2
作者:
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通讯作者:
Chun-Hua Chen;Y. Xuan;S. Otani
影响因子:
6.2
作者:
I. Bogomol;T. Nishimura;O. Vasylkiv;Y. Sakka;P. Loboda
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J. Sonber;K. Sairam;T. Murthy;A. Nagaraj;C. Subramanian;R. C. Hubli
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J. Sonber;K. Sairam;T. Murthy;A. Nagaraj;C. Subramanian;R. C. Hubli
影响因子:
29.4
作者:
Han Zhang;Jie Tang;Qi Zhang;Gongpu Zhao;Guang Yang;Jian Zhang;O. Zhou;L. Qin
通讯作者:
Han Zhang;Jie Tang;Qi Zhang;Gongpu Zhao;Guang Yang;Jian Zhang;O. Zhou;L. Qin
影响因子:
6.2
作者:
Bogomol, I.;Nishimura, T.;Loboda, P.
通讯作者:
Loboda, P.