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献标识码:A Influence of liquid medium on ultrafine grinding of pyrite LIU Wen-ping1, 2, YIN Zhou-lan1, DING Zhi-ying1, CHEN Qi-yuan1 (1. School of Chemistry and Chemical Engineering, Central South..., dispersibility of pyrite in water and ethanol and by the calculation of EDLVO theory. The results show that higher grinding efficiency can be obtained at an appropriate slurry viscosity in the ultrafine......
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ARTICLE J. Cent. South Univ. (2019) 26: 1416-1425 DOI: https://doi.org/10.1007/s11771-019-4097-4 Hydrothermal synthesis and energy storage performance of ultrafine Ce2Sn2O7 nanocubes HUO Yi-feng(霍一... and Chemical Engineering, Central South University, Changsha 410083, China Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract: Ultrafine cube-shape......
in detail. The shear strain, mechanism of grain refining and strengthening were analyzed. Large size materials with ultrafine grains can be achieved easily by ARB process, whose tensile strength is usually 2?4 times compared with those of coarse grain materials. The strengthening can be attributed to the ultrafine grains, dislocation and texture developed during ARB process, as well as the dispersed......
高强度建筑钢筋的最新技术进展杨才福1(1.北京市钢铁研究总院)摘 要:介绍了国内外高强度钢筋的发展历史,生产技术进展和发展趋势.微合金化,余热处理,细晶化是发展高强度钢筋的有效途径.在微合金化钢筋方面,V-N钢筋具有明显的技术经济优势;通过利用廉价的氮元素,促进了V(C,N)的析出,显著提高了V的沉淀强化效果,可节约钒用量50%,达到了节约贵重合金资源,降低生产成本的目的.余热处理钢筋和细晶粒钢筋通过组织强化或利用超细晶技术,在碳素钢和20MnSi钢的基础上获得了400 MPa的Ⅲ级钢筋和500 MPa的Ⅳ级钢......
Microstructures of mechanically activated Ti-46at.%Al powders and spark plasma sintered ultrafine TiAl alloyXIA Li1), DING Hui1), Ruan Xuefong1), and REN Yaoyao2) 1) College of Power and Mechanical... different types of regions in the 16 h MAed Ti-46at.%Al powder. One type consisted of only Al with a grain size about 80 nm, and the other type a mixture of Al and Ti with a grain size of 30 nm......
as those used in the previous work[15] for investigating its impact toughness. After multi-pass RD-ECAP, Al-23%Si alloy could obtain ultrafine grain or grain fragment (about 150 nm) [15]. Herein...; Abstract: Ultrafine-grained(UFG) hypereutectic Al-23%Si (mass fraction) alloy was achieved through equal-channel angular......
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; 文献标志码:A Preparation of ultrafine structured Ti/TiC nanocomposite powders ZHENG Yi-feng, YAO Xun, LIANG Jia-miao, ZHANG De-liang (The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China) Abstract: The ultrafine structured Ti powder and Ti/TiC nanocomposite powders were prepared by high-energy ball milling and dehydrogenation......
and surfactant addition on properties of ultrafine 98W-1Ni-1Fe powderHAN Yong, FAN Jing-lian, LIU Tao, CHENG Hui-zhao, GAO Yang, TIAN Jia-min(State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China)Abstract:The effect of ball milling modification time and surfactant addition on the properties of ultrafine 98W-1Ni-1Fe used for powder injection molding was investigated......