Search results

Nondestructive Evaluation in Materials Using Time-Frequency Analysis Methods Ki Woo Nam 1,a, Seok Hwan Ahn 1,b and Jin Wook Kim 2,c 1 Pukyong National University, Busan, Korea 2 Korea Institute of Machinery and Materials, Changwon, Korea a namkw@pknu.ac.kr, bshahn@mail1.pknu.ac.kr, Cjwkim@kmail.kimm.re.kr Keywords: Degraded Material, Velocity, Attenuation, NDE, Joint-Time Frequency Analysis Abstract.
WVD was found to be more effective for analyzing the attenuation and frequency characteristics of degraded materials through ultrasonic.
These materials are used in nuclear power plants pipes and reactors.
Nam: Journal of Testing and Evaluation Vol. 31 (2003), p. 347 [9] K.W.
Moon: J. of Applied Polymer Science Vol. 88 Issue 7 (2003), p. 1659

Research on composite material is an important development trend of material, and high performance composite material is one of important symbol for measuring the development level of science and technology of the country.
It is suitable for semiconductor substrate material, infrared and radar transmission material [11-13].
The raw materials are added into distilled water, heating and mixing to obtain the solution, and the morphology and production of aluminum nitride whiskers precursor are affected by the produced solution concentration in a certain extent.
References [1] Li Guangyu, Li Zidong and Jin Ye; properties of whisker and its application progress thermosetting resins; 2000,15(2):48-51 [2] Pan Jinsheng, CHAN Wing-Wah; Whisker and its application of journal of composites; 1995, 12 (4): 1-7 [3] Wei ming, Wang chunbo and Ying; progress of inorganic whisker research; research on Salt Lake; 2004, 12 (4) : 58-62 [4] Li Qiang , Jin Zhiliang and Zhang Zhihong; application and synthesis of inorganic whisker materials; the progress of chemistry; 2003, 15(4) : 264-273
[5] Yuan Jianjun; research progress of whisker; material science and technology; 1996 ,14 (4):15-21 [6] Liu ling, Yin Ning and Kang Mao-Qing; study on the mechanism of whisker reinforced composites; materials review; 2000 ,14 (6) :46-48 [7] Guo Jingkun; the progress of carbon fiber-reinforced ceramic composites, material science and engineering; 1989 ,7 (2) :7-12 [8] Jin Peipeng, Wen sheng and Ding Yutian; application of whiskers in composites and their mechanism of Salt Lake Research 2005 ,13 (2) :1-6 [9] Fu Renli, Lu Chen; research progress of aluminum nitride whiskers; progress in natural science; 1998, 8(2):513-519 [10] Jiecai Han, Shanyi Du; Combustion synthesis of AlN whiskers; SCI; 2006,41:1697-1703 [11] Weimer A W, Cochran Ga , Eisman Ga , et al; Rapid Process for Manufacturing Alumunum Nitride Powder; Journal of the American Ceramic Society; 1994,71 (1) : 3-18 [12] Slack Ga , Mcnell Y T F; Growth of High Purity AlN Crystals; Journal of Crystal Growth; 1976, 34

Bio-modeling, Bio-medical devices and Implants and Bio-materials encompasses with AM are termed as Bio-Additive Manufacturing (BAM) [2].
Virtually any powdered materials that will fuse but not decompose under laser beam can be used for fabrication [4,5].
[6] Yingkai Liu, Dedong Hou, Guanghou Wang “A simple wet chemical synthesis and characterization of hydroxyapatite nanorods”, J.Materials Chemistry and Physics, Vol 86, pp 69–73, 2004
Marquis, “Microstructural Characterization of hydroxyapatite coating on titanium”, Journal of Material Science, Vol 3, pp 283-287, 1992
[14] Miroljub Vilotijevi, Petar Markovi, Slavica Zec, Slobodan Marinkovi, Vukoman Jokanovi(2011), “Hydroxyapatite coatings prepared by a high power laminar plasma jet”, Journal of Materials Processing Technology 211 996–1004

Introduction Ceramic materials with high intensity, high hardness, corrosion resistance, high temperature resistance and other properties, make it have incomparable advantages over other materials in harsh environments [1, 2].
Many scholars have done a lot of work of processing micro structures of ceramic materials using special processing technology.
Zhang, Ceramic MEMS：New Materials, Innovative Processing and Future Applications, American Ceramic Society Bulletin. 80 (2001) 25-30
Scheller, Conventional machining of green aluminum/aluminum nitride ceramics, The Ohio Journal of Science. 94 (1994) 151–154
Ngoi, Dry machining: Machining of the future, Journal of Materials Processing Technology. 101 (2000) 287-291.

Zhu: Fundamentals of Materials Science and Engineering (National Defense Industry Press, China 2010) [13] R.
Milne: Materials Letters.
A319-321 (2001), p. 882-886 [19] Dongil Son, Jong-jin Kim, Ju-Young Kim and Dongil Kwon: Materials Science and Engineering.
Han: Journal of Functional Materials and Devices.
Mao: Functional Materials.

Virk3,c 1Materials Research Centre, Indian Institute of Science, Bangalore -560012, India. 2Department of Physics, University College of Science, Osmania University, Saifabad, Hyderabad – 500 004, India Professor Emeritus, Eternal University, Baru Sahib, Himachal Pradesh, India apraveenaou@gmail.com (*corresponding author), bsadhanaphysics@gmail.com, chardevsingh.virk@gmail.com Keywords: Ferromagnetic Materials, Soft Magnetic Materials, Mn-Zn Ferrites, Microstructure, Complex Permeability, M-H Loops.
Magnetic materials with low coercivity of the order of 12.5 Oe are termed as soft and those with coercivity above 12.5 Oe are called hard magnetic materials.
This is more beneficial for the formation of uniform colloidal materials.
Varma, Ferroelectric and optical properties of Ba5Li2Ti2Nb8O30 ceramics potential for memory applications Journal of Materials Science: Materials in Electronics 25, (2014) 3103–3108
Willis, Synthesis and Magnetic Properties of Nanostructured Maghemite, Journal of Materials Research 12 (1997)2175-2182

MASAUM Journal of Basic and Applied Sciences, 2009. 1(3): p. 493-496
Journal of Materials in Civil Engineering, 2004. 16(5): p. 497-506
Materials & Design, 2009. 30(9): p. 3859-3868
[25] Walker, P., Bond Characteristic of Earth Block Masonry Journal of Materials in Civil Engineering, 1999. 11(3): p. 249-256
Materials & Design, 2009. 31(1): p. 104-112

There are many ways to manufacture foam metallic materials, such as Gas injection, Vapour deposition, Solid-gas eutectic solidification, Powder compact melting technique, et al.
Foam metallic materials produced by Electro-deposition technique have an excellent three dimensional reticulated structure, high porosity, high specific surface area and uniform quality.
Journal of Power Sources.
Davies, Shu Zhen．Journal of Materials Science , Forum Vol. 18 (1983), p.1899-1911 [4] J.
Banhart．Progress in Materials Science, Forum Vol. 46 (2001) , p. 559-632 [5] Z.

Review: Materials for vibration damping.
Journal of Materials Science, Vol.36(2001), p.5733-5737 [2] Buravalla V.R., Remillat C., Rongong J.A., Tomlinson G.R.
Journal of polymer science: Polymer physics, Vol.37(1999), p.3065~3070 [11] Z.M.
Materials Science and Engineering, B103, 2003: 140~144 [12] Asmatulu R., Claus R.O, etal.
Journal of materials science, Vol. 30(1995), p. 2648~2654

Educational and Research Institute, Chennai, 600095, Tamilnadu, India e-mail: ksnallu@gmail.com Keywords: Carbon Black, Halloysite Nanotubes, Mechanical Properties, XRD, SEM Abstract: Composite materials are the leading emerging materials over the past twenty years since its introduction.
Polymer nanocomposites with reinforced rubber are a remarkable development in the field of engineering materials.
The applications of composite materials have significantly increased in Defense, Aeronautical Automobiles etc.
In order to acquire desired results natural materials alone do not meet requirements, but along with the composite materials challenges could be met.
Mohd Ishak, (2013), “preparation and properties of clay- reinforced epoxy nanocomposites”, International Journal of Polymer Science Vol. 201, pp. 01-07 [2] N.