2012 Vol. 19, No. 5

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Recovery of valuable metals from a low-grade nickel ore using an ammonium sulfate roasting-leaching process
Xin-wei Liu, Ya-li Feng, Hao-ran Li, Zhi-chao Yang, and  Zhen-lei Cai
2012, vol. 19, no. 5, pp. 377-383. https://doi.org/10.1007/s12613-012-0567-5
Abstract:
Metal leaching from a low-grade nickel ore was investigated using an ammonium sulfate roasting-water leaching process. The nickel ore was mixed with ammonium sulfate, followed by roasting and finally leaching with water. During the process the effect...
Phase transformation and reduction kinetics during the hydrogen reduction of ilmenite concentrate
Xin-guo Si, Xiong-gang Lu, Chuan-wei Li, Chong-he Li, and  Wei-zhong Ding
2012, vol. 19, no. 5, pp. 384-390. https://doi.org/10.1007/s12613-012-0568-4
Abstract:
The reduction of ilmenite concentrate by hydrogen gas was investigated in the temperature range of 500 to 1200℃. The microstructure and phase transition of the reduction products were studied by X-ray diffraction (XRD), scanning electron microscopy (...
Lab experiments on the innovative rapid thick strip casting process
Richard Nagy and  Dieter Senk
2012, vol. 19, no. 5, pp. 391-398. https://doi.org/10.1007/s12613-012-0569-3
Abstract:
Rapid thick strip casting (RTSC) by Anton Hulek, Inventmetall®, is an innovative concept for the production of hot strips with a final as-cast thickness of about 25 mm before rolling. The innovation of the mechanism consists in a vertical mould perfo...
Grain boundary segregation of minor arsenic and nitrogen at elevated temperatures in a microalloyed steel
Yuan-zhi Zhu, Zhe Zhu, and  Jian-ping Xu
2012, vol. 19, no. 5, pp. 399-403. https://doi.org/10.1007/s12613-012-0570-x
Abstract:
Auger electron spectroscopy (AES) was used to investigate the grain boundary segregation of arsenic and nitrogen in a kind of microalloyed steel produced by a compact strip production (CSP) technology at 950 to 1100℃, which are similar to the hot wor...
Effect of interface morphology on the mechanical properties of titanium clad steel plates
Ji-xiong Liu, Ai-min Zhao, Hai-tao Jiang, Di Tang, Xiao-ge Duan, and  Heng-yong Shui
2012, vol. 19, no. 5, pp. 404-408. https://doi.org/10.1007/s12613-012-0571-9
Abstract:
Interface morphology has important influence on the bond quality of titanium clad steel plates. The mechanical properties of titanium clad steel plates with wavy and straight interfaces were investigated by tensile-shear tests and bending tests. The ...
Mechanical properties and fracture toughness of rail steels and thermite welds at low temperature
Yuan-qing Wang, Hui Zhou, Yong-jiu Shi, and  Bao-rui Feng
2012, vol. 19, no. 5, pp. 409-420. https://doi.org/10.1007/s12613-012-0572-8
Abstract:
Brittle fracture occurs frequently in rails and thermite welded joints, which intimidates the security and reliability of railway service. Railways in cold regions, such as Qinghai-Tibet Railway, make the problem of brittle fracture in rails even wor...
Failure analysis of 18CrNi3MoA drilling tails
Hong-wu Zhu, Ya-zheng Liu, Le-yu Zhou, Lei-ying Wang, and  Bin Huang
2012, vol. 19, no. 5, pp. 421-427. https://doi.org/10.1007/s12613-012-0573-7
Abstract:
The fracture of a drilling tail made of 18CrNi3MoA steel in the exchanging water hole was analyzed in terms of inclusions, prior austenite grain size, carburized layers, and fatigue fracture morphology by means of optical microscopy, quantitative met...
Transformation character of ferrite formation by a ledge mechanism under a mixed-control model
Zhen-qing Liu, Zhi-gang Yang, Zhao-dong Li, and  Chi Zhang
2012, vol. 19, no. 5, pp. 428-433. https://doi.org/10.1007/s12613-012-0574-6
Abstract:
A mixed-control model was developed to study the transformation character of ferrite formation by a ledge mechanism. A numerical two-dimensional diffusion-field model was combined to describe the evolution of the diffusion field ahead of the migratin...
Preparation of Al-Cu-Fe-(Sn,Si) quasicrystalline bulks by laser multilayer cladding
Li-ping Feng, Eric Fleury, and  Guo-sheng Zhang
2012, vol. 19, no. 5, pp. 434-440. https://doi.org/10.1007/s12613-012-0575-5
Abstract:
(Al65Cul20Fe15)100-x Snx (x=0, 12, 20, 30) and Al57Si10Cu18Fe15 powders were cladded on a medium carbon steel (45# steel) substrate by laser multilayer cladding, respectively. The phases and properties of the produced quasicrystalline bulks were inve...
Microwave assisted synthesis & properties of nano HA-TCP biphasic calcium phosphate
E. Ghomash Pasand, A. Nemati, M. Solati-Hashjin, K. Arzani, and  A. Farzadi
2012, vol. 19, no. 5, pp. 441-445. https://doi.org/10.1007/s12613-012-0576-4
Abstract:
Biphasic calcium phosphate (BCP) nanopowders were synthesized by using microwave and non-microwave irradiation assisted processes. The synthesized powders were pressed under a pressure of 90 MPa, and then were sintered at 1000-1200℃ for 1 h. The mech...
Fabrication and thermal conductivity of copper matrix composites reinforced by tungsten-coated carbon nanotubes
Jun-hui Nie, Cheng-chang Jia, Xian Jia, Yi Li, Ya-feng Zhang, and  Xue-bing Liang
2012, vol. 19, no. 5, pp. 446-452. https://doi.org/10.1007/s12613-012-0577-3
Abstract:
Carbon nanotubes (CNTs) were coated by tungsten using metal organic chemical vapor deposition. Magnetic stirring was employed to disperse the W-coated CNTs (W-CNTs) in a Cu matrix, and then, the mixed powders were consolidated by spark plasma sinteri...
Characterization of a Y-type hexagonal ferrite-based frequency tunable microwave absorber
Fang Xu, Yang Bai, Kai Jiang, and  Li-jie Qiao
2012, vol. 19, no. 5, pp. 453-456. https://doi.org/10.1007/s12613-012-0578-2
Abstract:
A Y-type hexaferrite rod with the composition of Ba2Co1.8Cu0.2Fe12O22 was presented as an absorbing material with high absorbance. Its high absorbance and wide absorption band result from ferromagnetic resonance (FMR) that is self-biased by strong sh...
Electrochemical properties of LiNi0.5Mn1.3Ti0.2O4/Li4Ti5O12 cells
Guo-qiang Liu, Xi Wang, Ya-jie Gao, Lei Wen, Guang-yin Liu, Jian-jie Zheng, Peng Cen, and  Ying Li
2012, vol. 19, no. 5, pp. 457-460. https://doi.org/10.1007/s12613-012-0579-1
Abstract:
Spinel compounds LiNi0.5Mn1.3Ti0.2O4 (LNMTO) and Li4Ti5O12 (LTO) were synthesized by different methods. The particle sizes of LNMTO and LTO are 0.5-2 and 0.5-0.8 μm, respectively. The LNMTO/LTO cell exhibits better electrochemical properties at both ...
Micro-arc oxidization fabrication and ethanol sensing performance of Fe-doped TiO2 thin films
Fu-jian Ren, Xiao-bai Yu, Yun-han Ling, and  Jia-you Feng
2012, vol. 19, no. 5, pp. 461-466. https://doi.org/10.1007/s12613-012-0580-8
Abstract:
In-situ pure TiO2 and Fe-doped TiO2 thin films were synthesized on Ti plates via the micro-arc oxidation (MAO) technique. The as-fabricated anatase TiO2 thin film-based conductometric sensors were employed to measure the gas sensitivity to ethanol. T...
Synthesis of BiOCl photocatalyst by a low-cost, simple hydrolytic technique and its excellent photocatalytic activity
Yan Wang, Zhu-qing Shi, Cai-mei Fan, Xiao-gang Hao, Guang-yue Ding, and  Yun-fang Wang
2012, vol. 19, no. 5, pp. 467-472. https://doi.org/10.1007/s12613-012-0581-7
Abstract:
A novel photocatalyst, bismuth oxychloride (BiOCl) micro-nano particles with a fine ferrite plate structure, was prepared by a low-cost, simple hydrolytic method. The as-prepared BiOCl was characterized by scanning electron microscopy (SEM), thermogr...