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Limsuwan1,2,d 1Department of Physics, Faculty of Science, King Mongkut’s University of Technology Thonburi, Bangkok, 10140, Thailand 2Thailand Center of Excellence in Physics, CHE, Ministry of Education, Bangkok 10400, Thailand 3Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand 4Science Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand amink110@hotmail.com,bnattapon_g@hotmail.com, copticslaser@yahoo.com Keywords: Glasses, Rice husk, Optical property, Lead oxide Abstract.
According to the classical dielectric theory, the refractive index depends on density and polarisability of the atom in a given materials [4].
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Badawia Faculty of Science, Physics Department, El- Minia University, El-Minia, Egypt aemadbadawi@yahoo.com Keywords: Al Alloys, Grain Size, Plastic Deformation, Positron Annihilation Lifetime, XRD Abstract Certain radioactive isotopes decay by emitting positrons, and the positrons can be used to probe the structure of solid materials.
Grain boundaries in materials posses a more open structure than the perfect crystal as shown by Seeger and Schottky [9].
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As the results showed,when the fluidity decreases with the increase of resin dosage(water-based epoxy resin on the percentage of total materials), and the best resin dosage is 9.7% around.
Material.
Acknowledgement China Hunan provincial science and technology plan key project 2011wk2004; China natural science fundation project 21276028.
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Linear elastic fracture mechanics (LEFM) can be used for description of crack propagation in brittle materials.
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Máca: Journal of Material Science Vol. 42 (2007), p. 6404
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Therefore, this research will do mapping the cutting parameter of both materials to get the characteristics or different behavior of the machining process on poor machinability materials and excellent machinability materials.
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Experimental Materials.
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In 1943 further experiments were undertaken building structural aircraft parts from composite materials resulting in the first plane, a Vultee BT-15, with a GFRP fuselage, designated the XBT-19, being flown in 1944. 
However, the FRP is proved to be one of the prior materials could be used in marine and civil Engineering.
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Introduction UHTCs are a group of materials consisting of zirconium diboride or hafnium diboride plus silicon carbide.
These materials offer a good combination of properties to withstand temperatures in the range from 1900 to 2500ºC.
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Zaykoski: Journal of Materials Science.
Faber: Journal of Physics and Chemistry of Solids.