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a cclin@mail.dyu.edu.tw, b fengmin@mail.dyu.edu.tw, c r9915034@mail.dyu.edu.tw Keywords: PVDF, coating, piezoelectric materials, polarization, modal analyze.
In this study, we are used the raw PVDF materials to produce the piezoelectric polymer layers are used as the coating film, observe whether the thicknesses of specimen affect the polarization and analyze the natural frequency of polymer material plates.
Acknowledgements This research was supported by the National Science Council of Taiwan under Grant No.
Journal of Microelectromechanical Systems, 6, No. 3, 1997
Journal of the European Ceramic Society, 45, pp. 1673-1676, 2004

Michel 5, 15100 Alessandria, Italy 2Institute of Engineering Materials and Biomaterials, Silesian University of Technology, Konarskiego St. 18a, 44-100 Gliwice, Poland a zbigniev.brytan@polito.it Keywords: stainless steel, duplex materials, materials properties Abstract: The aim of the presented paper is to describe the sintered duplex stainless steels manufactured in sinter-hardening process and their structural and mechanical properties.
Pallavicini, Properties of vacuum sintered Duplex Stainless Steels, Journal of Materials Processing Technology 157-158 (2004) 312-316
Actis Grande, High density sintered stainless steels with improved properties, Journal of Achievements in Materials and Manufacturing Engineering 21/2 (2007) 97-102
Rosso, Sintered Duplex Stainless Steels Corrosion Properties, Materials Science Forum 534-536 (2007) 721-724
Molenda, Processing and properties of sinters prepared from 316L steel nanopowders, Journal of Achievements in Materials and Manufacturing Engineering 21/2 (2007) 73-76.

Black charcoal is difficult to dye, Materials Science, Yanshan University, successfully developed a white charcoal powder which can be added to the fiber and various composite materials to prepare a color variety of products.
Journal of Huazhong Science and Technology University (Natural Science Edition), vol. 6 (2012), p.104-108.
Ye: Journal of Nanjing Forestry University (Natural Science Edition), vol. 26(2002) No.4, p.47.
Fei, etc.: New Carbon Materials, vol. 19(2004) No.4, p.249.
Yue: Journal of Beijing University of Chemical Technology (Natural Science Edition), vol. 2(2010), p.77-82.

Castner, Journal of Biomedical Materials Research Part A, Vol. 75A(2005), p. 1
Li, Journal of Inorganic Materials, Vol. 23(2008), p.145
Feijen, Journal of Materials Science-Materials in Medicine, Vol. 14(2003), p. 103
Jeong, Journal of Materials Chemistry, Vol. 17(2007), p. 174
Dard, Journal of Materials Science-Materials in Medicine, Vol. 15(2004), p. 779

Composite materials or generally materials with interfaces are nowadays used in many varied engineering applications.
The considered thickness of both materials (1 and 2) was the same, i.e. t = 15 mm.
This effect can influence time to failure of structures made from materials with interfaces (e.g. composite materials).
Journal of Fracture, 12 (1976), p. 52
Journal of Fracture 73 (1995), p. 1-23 [3] D.N.

If the material is linear elastic, the relationship of similar scales is.
The relationship of the similar scales above is still true in brittle material failure model test.
If the materials of model and prototype are elastic until they are damaged, the similar scales of tensile stress, compressive stress and the similar scale of stress have a relationship as follows: (2) In Table 1, the relationship of similar scales in nonlinear dynamic model test is listed when gravity and geometry are completely similar.
Acknowledgements This work was financially supported by the National Basic Research Program of China (Grant No. 2013CB035905) and the National Nature Science Foundation of China (Grant No.50909015).
References [1] Songyou Xia, Chufang Zhang, Mingqi Zhang: Journal of Hehai University (Natural Sciences) (1980), pp.59-72 (In Chinese) [2] Ying Zhou, Xilin Lv, Wensheng Lu: Structural Engineers Vol. 22 (2006), pp. 37-40 (In Chinese) [3] Xilin Lv, Yueqing Chen: Earthquake Engineering and Engineering Vibration Vol.21(2001), pp. 85-92 (In Chinese) [4] Kazuo Konagai, Toyoaki Nogami: Soil Dynamic and Earthquake Engineering Vol. 17(1998), pp.279-287 [5] Minzheng Zhang: Earthquake Engineering and Engineering Vibration Vol.17 (1997), pp.52-58(In Chinese) [6] Hangen Ni, Chongpan Jin:Anti-seismic properties and calculation of dam (Dalian University of Technology Press, Dalian 1994) (In Chinese) [7] Jianyun Chen, Yi Zheng: Journal of Hydraulic Engineering Vol.41 (2010), pp.826-832 (In Chinese)

Materials with cracks.
Shevelev, Brittle-fracture criterion and durability of materials under thermomechanical action, Journal of engineering physics and thermophysics. 81 (2) (2008) 420−427
Shevelev, Fracture criterion and durability of brittle materials under conditions of stationary heat and mass transfer, Journal of engineering physics and thermophysics. 83 (1) (2010) 52−59
Shevelev, Structural-kinetic stochastic model of fracture and durability of brittle materials, Journal of Applied Mechanics and Technical Physics. 52 (4) (2011) 637−643
Inorganic materials series. 3 (10) (1967) 1767−1770

This innovative approach entails synergistic advancements in nanotechnology and materials science.
Recent advancements in materials science have been crucial for the development of more efficient nanoantennas [9].
Recent advancements in materials science have introduced alternatives such as graphene and carbon nanotubes (CNTs).
Tanaka, "Application of nanoimprint lithography," Journal of Photopolymer Science and Technology 15, 475 (2002)
Popoola, "Recent advances in solar photovoltaic materials and systems for energy storage applications: A review," Beni-Suef University Journal of Basic and Applied Sciences 12, 66 (2023)

Traditional core materials include honeycomb, foam, etc., among which honeycomb sandwich structure is the most common.
This kind of three-dimensional periodic structure is formed by folding flat materials according to the law.
A variety of materials can be used to prepare foldcore sandwich, such as: thin sheets of paper, metal, thermoplastic materials (PEEK, PET, etc.), Nomex paper, carbon fiber composite materials, aramid fiber composite materials, etc. [10].
There are many types of materials that can be stamped, and there is no requirement for the melting point.
However, this automated process is mainly suitable for metal materials with good ductility.

Doped carbon materials have been recognized as a promising non-Pt cathode catalyst for oxygen reduction reaction (ORR).
The cyclic voltammetry curves (CV) show that the composite can catalyze the ORR much more efficiently than either of the single materials containing only carbonized PANI or carbonized PB in alkaline media.
N-doped carbon materials are recognized as a potential non-Pt ORR electrocatalyst.
It's reported that the incorporation of N element into carbon materials can significantly enhance the number of active sites to improve ORR activity [1,2].
The pyrolysis of PANI, which is an aromatic polymer containing nitrogen in the backbone, is a simple way to prepare nitrogen doped carbon-based materials [3-5].