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Chen C.,Guizhou University | Chen C.,Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou | Yang F.,Guizhou Normal University | Chen H.,Guizhou Normal University | Liu J.,Guizhou Normal University
Gongneng Cailiao/Journal of Functional Materials | Year: 2015

In order to solve the problems existing in the preparation process of La-Mg-Ni alloy, such as oxidation and volatilization, the La-Mg master alloy was prepared by a smelting method with protection by molten salt and used as raw material to sintering synthesis La2MgNi9 alloys. The sintering process was assisted by a strong magnetic field. The XRD results indicates that the single phase for all alloys was PuNi3 type (La,Mg)Ni3. The pressure-composition isotherm (PCT) results show that the alloys prepared under 1 T magnetic field has the maximal hydriding capacity (1.490wt%). The alloy shows excellent hydriding/dehydriding kinetics properies. The desorption heat behavior of all alloys have no significant change with the change of magnetic field intensity. ©, 2015, Journal of Functional Materials. All right reserved. Source

Chen C.Y.,Guizhou University | Chen C.Y.,Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou | Zhang M.,Guizhou University | Zhang M.,Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou | And 4 more authors.
Materials Research Innovations | Year: 2015

The preparation of glass-ceramics with high contents of red mud ash using TiO2 and titanium slag as nucleation agents, respectively, is proposed. The effects of different formulations on physicochemical properties, microstructure and phase composition of glass-ceramics were investigated, followed by the analysis of the crystallisation behaviours. The results showed that the primary crystalline phase was Ca2(Al(AlSi)O7) in both cases, while the secondary crystalline phase was (CaFeO6Si2m) and Ca(Al2Si2O8), respectively. Also, the crystallinity increased with increasing content of nucleation agent, and condensations were observed once the nucleation agent content exceeded a critical value. With the contents of TiO2 and titanium slag to be 1 and 6·6%, respectively, the overall content of industrial solid wastes achieved 93·9 and 95·3%, respectively. The performance of as-prepared glass-ceramics can satisfy the requirements of JC/T 872-2000 standard. Therefore, this study is of great significance for the recycling of industrial solid wastes. © W. S. Maney & Son Ltd 2015. Source

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