Search results

Research on Microstructure and Properties of Co-Si Alloys by Vacuum Suction Casting Zhen Penga, Penghui Wub, Jing Zhangc, Ning Liud* and Xiaojing Wange* School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, China apengzhen-1989@163.com, bbellaw0912@126.com, c591314725@qq.com, dlnlynn@126.com, exjwang.0@163.com Keywords: Co-Si alloys, Rapid solidification, Microstructure, Metastable phase, Hardness.
The materials were melted for at least 5 times to ensure the homogeneity of the melting.
Materials Science and Engineering A. 344(2003) 10-19
Materials Letters. 61(2007) 987-990
Journal of Alloys and Compounds. 490(2010) L1-L4

Primary experiments, in which small electrodes with different materials are used to machine 3mm thickness TC4, are carried out.
Machining parameter table for small hole under the condition that different electrode materials and capacitances are chosen is shown in Table 2.
From Fig.7 it can be obtained that no matter what electrode materials are chosen machining efficiency increases as capacitance increases and electrode relative wear decreases little as capacitance increases.
Acknowledgement This study has been supported by National Natural Science Foundation of China.
[5] Y.Li,X.J.WANG,M.Guo et al.: Journal of Tsinghua Univ.

Until now, more than 20 materials have been successfully produced nanocrystals[18,19,20,21,22].
Materials and methods 2.1.
Materials Glycyrrhizic acid (³98%) for nanosuspension preparation was purchased from Xi'an Green-Life Natural Products Co., Ltd.
Digestive Diseases and Sciences, 51, 603–609
Journal of Huazhong University of Science and Technology, 28, 104-105

(Science Press, China, 2006), p.26-37 (in Chinese)
Journal of Building Structures, Vol. 28 (2007) No.1, p.7-13.
ACI Materials Journal, Vol. 93 (1996) No.3, p.242-245
Construction and Building Materials, Vol. 21 (2007), p.2031-2040
Journal of Hydraulic Engineering, (1999) No.1, p.41-49.

Raw materials Concrete in this freeze-thaw cycle test is: (a) C35 double-doped mineral concrete（C35FA+SP）; (b)C50 double-doped mineral concrete（35LA）; (c)C35 two minerals and liquid preservative composition concrete（35SA）; (d) C35 two minerals and solid preservative composition concrete（C50FA+SP）.
Table 1 Mix proportion of double-doped mineralconcrete Concrete grade Raw material dosage（kg/m3） cement Fly ash Slag powder Sand Stone Water Water reducer Preservative C35FA+SP 209 95 76 731 1144 152 4.94 — 35LA 209 95 76 731 1144 152 — 5.7 35SA 209 95 76 731 1144 152 — 15.2 C50FA+SP 267 121 97 621 1153 150 6.30 — Raw materials of concrete include: (1) cement: ordinary portland cement P.O42.5R, density 2912g/m3; (2) fly ash: I high-quality fly ash, density 2059kg/m3; (3) slag powder: S95 mineral powder, density 2900kg/m3;(4) sand: river sand, Ⅱ area medium sand; fineness modulus 2.77, apparent density 2632kg/m3, bulk density 1630kg/m3 , mud content 1.6%; (5) coarse aggregate: 5~20mm diameter stone, apparent density 2719kg/m3, elongated and flaky particles content 2.83%, mud content 0.54%; (6) water: tap water, PH value 8.73; (7) water reducer: JX-GBNH1/1 type high range polycarboxylate water reducer, water reducing ration 25%~30%; (8)liquid preservative: high performance anti-corrosion
Acknowledgement We would like to thank National Natural Science Foundation (51008253) and Ministry of Railways scientific research and development project (2008G032-5) supports during the research.
References [1] Cui Shengai, Ye Yuezhong, FU Fei, Liu Zhifeng: Advanced Materials Research. 2010,Vol.150 (2010), p.542 [2] Nobuaki Otsuki, Shin-ichi Miyazato, Nathaniel B: ACI Materials Journal Vol.97 (6)(2000),p. 454 [3] Ye Jianxiong, Li Xiaozheng, Liao Jiaqing: Journal of Chongqing Jianzhu University Vol.27 (3)(2005),p.89 (In Chinese) [4] Xie Youjun, Liu Baoju, Liu Wei: Journal of Railway Science and Engineering Vol.1 (2)(2004),p.46 (In Chinese)

Material model.
Fig.7 Time History of Impact Force Curve Factors that may affect the impact force are in the following: vehicle quality, velocity; protection frame quality, structure, materials.
Acknowledgements This work was financially supported by National Natural Science Fundation of China (10872178), Natural Science Fundation of Shandong Province (ZR2009FM074, Y2008F56).
China Journal of Highway and Transport, 2009, 22(5): 61-66
Journal of South China University of Technology, 2003, 31(3): 64-67

Study of combination algorithm in partitioning manufacture technology WANG Hui-feng, ZHANG Yong-jun, HAN Jin-tao, CHEN Ling School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083 Keyword: Model Partitioning; Feature-based; Combination algorithm; BAAG Abstract: Partitioning Manufacture Technology (PMT), which can get complex parts by simple processing has been developed to reduce tooling cost or increase machining efficiency.
Corresponding numbers of machining features is 6, partitioning area is 0.00395 and material utilization is 0.75522.
Journal of Shanghai Jiaotong University .2007, 41(9) : 1492-1496. 5.
Zhu Hu_, Kunwoo Lee, Concave edge-based part decomposition for hybrid rapid prototyping, International Journal of Machine Tools & Manufacture , 2005, 45: 35–42. 6.
Lee, Part decomposition for die pattern machining, Journal of Materials Processing Technology , 2002, 130–131 :599–607. 8.

Effect of annealing temperature on structural and electrical properties of bismuth ferrite thin film Minfang Zhang1,a, Jingsong Liu1,b 1State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, China azhangminfang623@163.com bferam@163.com Keywords: bismuth ferrite, sol-gel, electrical property Abstract.
Introduction Multiferroic materials have attracted much attention because two or three of the properties (ferroelectricity, ferromagnetism, and ferrroelasticity) occur in the same phase [1].
Iron nitrate nonahydrate [Fe(NO3)3·9H2O] and bismuth nitrate pentahydrate [Bi(NO3)3·5H2O] were used as raw materials.
The precursor solutions of bismuth and iron nitrate were prepared by adding the raw materials to 2-Methoxyethanol and citric acid under heating and stirring.
Zheng, et al: Science Vol. 299 (2003), p. 1719 [9] Taimur Ahmed, Andrei Vorobiev, Spartak Gevorgian: Thin Solid Films Vol. 520 (2012), p. 4470 [10] Hailei Zhang, Xinman Chen, Tao Wang: Journal of Alloys and Compounds Vol. 500 (2010), p. 46 [11] A.

Their extremely high strength-to-weight ratio, very high Young modulus and high flexibility and toughness, make them candidate materials for future reinforced polymer matrix composites [8, 9, 12].
Experimental Raw Materials.
Nakagawa, The effects of metal filler on the characteristics of casting resin for semi-metallic soft tools, Journal of Materials Processing Technology 134 (2003) 26-34
Pouzada, Application of alternative materials in hybrid mould cores, in: RPD 2006 - Building the future by innovation, Marinha Grande/Portugal, 2006
Krupa, Electro-conductive resins filled with graphite for casting applications, European Polymer Journal 40 (2004) 1417-1422

Test materials and Methods Test Materials.
[3] MingZhi WANG, JieYing WANG, Li LI, “Roughness and roughness sense of wood surface from different machining processes”, Journal of Beijing Forestry University,2005, pp.14-18
[5] JinGui GAO, ZhaoFang JIANG, Jing HUANG, et al, “Research on the best work parameters of sand-belts with broadband sanding machine”, Forestry Science & Technology, 2009, pp.52-54
[6] JinGui GAO, Bai YU, ZhaoFang JIANG, et al, “the influence of main parameters of broadband sanding machine on its processing surface roughness”, Forestry Science & Technology, 2009, pp.57-58
[10] Chuwang Su, Quanping Yuan, Yi Chen, et al, “Research and Evaluation on the Planning and Sanding Properties of Magnoliaceae glanca Blume Plantation”, Wood Advanced Materials Research, 2012,pp. 105-109