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Slight change in the composition of the cathode materials was observed which may lead to the gradual degradation of cell performance.
Various degradation mechanisms, however, may appear such as chemical instability between different components of cells and sintering of electrode materials especially during a long-range operation at high temperatures.
As for the cathode side, initial research efforts on SOFC cathode degradation has been made on chromium poisoning effect, which mainly comes from metal interconnect materials and leads to severe degradation of cells [6, 7].
Takahashi, Science and Technology of Ceramic Fuel Cells, Elsevier, Amsterdam, (1995)
Sasaki, Journal of Power Sources, in press, (2010).

Reasons and Prevention Measures of Crack at the Bottom of the Extruded Magnesium Alloy Tube Mu Meng a, Zhimin Zhang b and Yongbiao Yang c College of Materials Science and Engineering, North University of China, Taiyuan 030051, China ameng19831021@163.com, bzhangzhimin@nuc.edu.cn, cyangyongbiao@yahoo.cn Keywords: Magnesium alloy, Extruded tube, Ring crack, Parameter optimization.
Introduction As the lightest metallic structural materials, magnesium and magnesium alloys are gaining increasing importance for applications including aerospace, automotive, materials handling, and portable electronic appliances [1–4].
Materials Science Forum, Switzerland: Trans.
Journal of Materials Processing Technology, P.381–385, (2001)
International Journal of Machine Tools &Manufacture, 2001, P. 188.

EAEs have demonstrated an estimated 0.4 J/g specific energy density, compared with around 0.1 J/g for advanced single crystal ceramics and around 0.04 J/g for electromagnetic materials.
EAEs have many advantages that distinguish them from other energy-conversion materials, such as, lighter – low density, high performance, multifunctional polymers; cheaper – inexpensive materials, fewer parts, no precision machining; quieter – high energy density and compliance of polymers allows quiet primarily sub-acoustic operation with few moving parts; softer – rubbery materials are impedance matched to large motions (e.g. human motion, engines); versatile – polymers are scale-invariant, and systems can be made in variety of form factors (conformal, elongated, etc.).
Pei: Science, Vol. 287 (2000), pp. 836-839
Perline: Journal of Sound and Vibration, Vol. 215 (1998) No. 2, pp. 297-311
Frecker: International Journal of Solids and Structures, Vol. 44 (2007) No. 9, pp. 2609-2626

In the manufacturing industry, wire electrical discharge machining process plays a predominant role to manufacture components with intricate profiles and shapes of hard materials that are very difficult to machine by conventional machining processes.
Wire electrical discharge machining is widely used in fields like dies, punches, aerospace and automotive industries for machining all types of conductive, exotic, high strength and temperature resistive materials with better precision and accuracy.
In this thermal erosion process, there is no physical contact between wire tool and work materials; as a result, the adverse effects such as mechanical stresses, chatter, and vibration normally present in traditional machining are eliminated. [1] Fig.1.
Garg (2009), Effects of process parameters on material removal rate in WEDM Journal of Achievements in Materials and Manufacturing Engineering, Vol.32, pp.70-74
[6] Muthu Kumar, Suresh Babu, Venkatasamy and Raajenthiren (2010), Optimization of the WEDM Parameters on Machining Incoloy800 Super alloy with Multiple Quality Characteristics, International Journal of Engineering Science and Technology,2(6),1538-1547.

Materials and Methods Preparation of tea polyphenols and polysaccharides from green tea.
Dou: International Journal of Molecular Sciences, Vol. 9 (2008), p. 1196-1206
Wang: Science in China Ser.
C Life Sciences, Vol. 47 (2003), p. 416-424
Tsai: Journal of Ethnopharmacol, Vol. 133 (2011), p. 440-446

Thanks to Professor Li Xudong, Chengdu Insititute of biology, Chinese Academy of Science.
Journal of Hazardous Materials. 129(2006), p. 123-129 [10] Mohan, D., Pittman, C.U., Steele Jr., P.
Journal of Hazardous Materials.
Journal of Hazardous Materials. 2009, 164:1004-1011 [14] V.
Journal of Hazardous Materials. 166 (2009), p. 318-326 [15] S.

Process analysis The fluid guide board in cooling equipment is mainly used to change the direction of the flow and smooth surface required, form and position tolerances of the demand is high also, the materials for 45 steel.
Such way of manufacturing blank solved the material utilization and the efficiency of the machining problem.
The Journal in Chinese of Machine Tool and Hydraulics 2007(7) PP53-55 [3]H.J.LIU: Machining Center Technology Application of CAD/CAM.
Press in Chinese by Shanghai Science and Technology Press. 2011.8PP102-138 [4] L-Y Zhang, H.
The International Journal of Advanced Manufacturing Technology, 2010, Volume 47, Numbers 5-8, Pages 639-655

Chinese Journal of Rock Mechanics and Engineering,2002/07:980-988
Chinese Journal of Rock Mechanics and Engineering, 2003/ 03: 383-386
Chinese Journal of Rock Mechanics and Engineering, 2002/03:379-384
Chinese Journal of Rock Mechanics and Engineering,2004/ 03: 469-475
Journal of Liaoning Technical University, 2007.26(1):40-42

Lai: Journal of Mech Theory,Vol.40(2005) No.1.p.55
LI: Journal of Chinese Science E Series: Science and Technology.
,University of Science and Technology of China 2008),p.28 [7] L.B.
MA: Journal of Computer Research & Development.
LI: Journal of Machine Design.

Magnetic soft-hard composites, combining the hard magnetic properties such as high coercivity with the high saturation magnetization achievable in soft magnetic materials, are potential materials for MEMS/NEMS.
Nelson, Electrodeposition of low residual stress CoNiMnP hard magnetic thin films for magnetic MEMS actuators, Journal of Magnetism and Magnetic Materials 292 (2005) 49-58
Cho, Study on advanced multilayered magnetostrictive thin film coating techniques for MEMS application, Journal of Materials Processing Technology 201 (2008) 678-682
Ataie, Synthesis of Nanocrystalline Barium Ferrite in Ethanol/Water Media, Journal of Materials Science and Technology, Vol.25, No.4 (2009) 465-469
Sumodjo, Development of electroplated magnetic materials for MEMS, Journal of Magnetism and Magnetic Materials 265 (2003)189-198