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Processing Micro-gear Based on Bio-etching Method Yude Liu1,2,a, Xinbing Wang1,b, Yu Yang 1,c and Wentian Shi1,2,b 1 School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China, 100081 2 College of Mechanical Engineering, Beijing Technology and Business University, Beijing, China, 100048 a liuyd@th.btbu.edu.cn, bcutting1@bit. edu.cn, cwhyy126@126.com Keywords: Bio-etching method, Micro-manufacturing technology, Micro-gear, Thiobacillus ferrooxidans Abstract.

Aging Behavior of Mg-9Gd-4Y-0.6Mn Alloy Zhenzhen Deng1,a, Xinming Zhang1,b,Yunlai Deng1, Yang Xiao1, Tiancai Guo 2 1School of Materials Science and Engineering, Central South University, Changsha 410083, China 2China Aerospace Science&Industry Corp Defence Technology R&T Center, Beijing 100854, China a samansa2000@163.com, b xmzhang@mail.csu.edu.cn Keywords: Mg-RE alloy; Ageing, TEM Abstract Microstructures and properties of rolled Mg-9Gd-4Y-0.6Mn（nominal wt%）sheets solution treated at 793K for 12h, and aged at various combinations of temperatures and time were investigated by hardness measurement, tensile test and TEM.

Yang, X.

[4] Wang Jialin，Xia Li，Wu Zhengguo，Yang Xuanfang.State of arts of fault diagnosis of power system[J].

[8] Fudong Gao, Cunyun Pan, Wenshan Cai and Zheng Yang: Chinese Journal of Mechanical Engineering Vol.46 (2010), p. 133.

Preparation and flame retardancy of waterbased phenolic resin/silica hybrid material prepared by in situ polymerization Yuan Tianbiao, Xu Guilong, Wang Yi, Yang Jin, Hu Jian State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China *Corresponding author.

References [1] Yang S L, Lin Q L.

Yang, Y.D.

Preparation and Fertilizer-permeation Performance of Urea-formaldehyde Resins Modified by Montmorillonite Zongrong Yinga, Haishen Liu, Rui Yan , Tianyin Yang, Zhimin Dang School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China a zrying@mail.njust.edu.cn Keywords: Urea-formaldehyde resin, Montmorillonite, fertilizer-permeation performance, Coating material, Controlled- release fertilizer Abstract.

Yang: Engineering Design, Vol. 9 (2002) No.2, pp. 89-93