| 1 | Effect of Heat Treatment Time on Dy–Cu Alloy Diffusion Process in Dy-Containing Commercial Nd–Fe–B Sintered Magnets显示文摘In this paper, the grain boundary diffusion process(GBDP) using a Dy_(70)Cu_(30)(at.%) alloy as the diffusion source was performed in a commercial sintered Nd–Fe–B magnet, and the effect of heat treatment time on the microstructure and magnetic properties of the magnet was investigated in detail. For the processed magnets heat-treated at 860℃, as heat treatment time increased, the coercivity and the depth of(Nd,Dy)_2Fe_(14)B core–shell structure increased first and then decreased. However, when the heat treatment time was more than 2 h, the diffusion path of Dy from the Dy-rich shell phase into the Nd_2Fe_(14)B grains was revealed, and a nearly homogeneous(Nd,Dy)_2Fe_(14)B phase was formed, which brought on the decrease in both the depth of visible core–shell structure and the coercivity of Nd–Fe–B magnet. | H.Y.Liu G.Wang Y.Hong D.C.Zeng | 2018 | Acta Metallurgica Sinica(English Letters)2018，31，5： | 1 |
| 2 | STUDY ON COMPOSITION, MICROSTRUCTURE AND HARDNESS OF DLC FILMS BY VCAD显示文摘DLC super-hard films have been deposited on the substrates of single crystalline Si, pure Ti and stainless steel 18-8 by a method of vacuum cathode arc deposition(VCAD). The composition, microstructure and micro-hardness of the films have been studied in this paper. The results indicate that hardness of the DLC films is different on the different substrates. Hardness of the films increases with decreasing in surface roughness of the films. The maximum value of micro-hardness belongs to the DLC films deposited under the hydrogen pressure of 0.35Pa and the negative bias of 100V. | L.Chen Z.Y.Liu D.C.Zeng W.Q.Qiu Z.H.Yuan S.S.Lin H.J.Hou | 2003 | Acta Metallurgica Sinica(English Letters)2003，16，4： | 0 |
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