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. The effects of mechanical activation are worst. Key words: sulfide ore; mechanism; mechanical activation; structural change  ...; Abstract: Structural changes for mechanically activated pyrite, sphalerite, galena and molybdenite......
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J. Cent. South Univ. (2020) 27: 1262-1272 DOI: https://doi.org/10.1007/s11771-020-4365-3 Numerical simulation of freezing effect and tool change of shield machine with a frozen cutterhead DAI Wei(代... to realize tool change operation at atmospheric pressure. Furthermore, the transformation project of freezing cutterhead and tool change maintenance method are put forward. Taking the shield......
J. Cent. South Univ. (2020) 27: 752-761 DOI: https://doi.org/10.1007/s11771-020-4328-8 Phase change materials as quenching media for heat treatment of 42CrMo4 steels Milad SAKKAKI1, Farhad SADEGH... and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: In the present work, paraffin phase change material is used as quenchant for the heat treatment of 42CrMo4 alloy and compared......
Structural characteristics of BaTiO3 films prepared by microarc oxidation LI Wen-fang(李文芳), HAN Bing(韩 冰), DU Jun(杜 军), PENG Ji-hua(彭继华), GAO Yin-hui(高引慧) College of Mechanical Engineering, South... words: microarc oxidation; ferroelectric film; BaTiO3; structural characteristics 1 Introduction BaTiO3, with a relatively large dielectric constant and unusual electro-optical coefficient, has......
J. Cent. South Univ. (2018) 25: 1708-1716 DOI: https://doi.org/10.1007/s11771-018-3862-0 Heat transfer performance testing of a new type of phase change heat sink for high power light emitting... of the limitations of solid metal heat sink in the heat dissipation of high power light emitting diode (LED), a kind of miniaturized phase change heat sink is developed for high power LED packaging......
powder is heat treated at 1 100 ℃ for 1 h, the grain size of β-SiC does not change, but the lattice ordering degree of β-SiC increases. Key words: SiC; mechanical alloying; structural evolution... Structural evolution of Si-50%C powder during mechanical alloying and heat treatment TANG Wen-ming(汤文明), ZHENG Zhi-xiang(郑治祥), WU Yu-cheng(吴玉程), XU Guang-qing(徐光青), L? Jun(吕 珺), LIU Jun-wu(刘君武......
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Structural stability of intermetallic compounds of Mg-Al-Ca alloy ZHOU Dian-wu(周惦武)1, 2, LIU Jin-shui(刘金水)3, ZHANG Jian(张 健)3, PENG Ping(彭 平)3 1. State Key Laboratory of Advanced Design... energies of these compounds were estimated from the electronic structure calculations, and their structural stability was also analyzed. The results show that Al2Ca phase has the strongest alloying ability......