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3D printing, also known as additive manufacturing, has been considered as the next big thing that can potentially spread as cell phone industry. Nowadays, product resolution restricted by material and fabrication process is ranging from 20 to 300 pm and still has the trends toward higher precision. However, tradeoff between time costs and resolution is always a dilemma in Fused Deposition Modeling...
The development of new permanent magnet materials is of particularly importance since the high-performance Nd2Fe14B are expensive due to the limited reserves of rare earth Nd, Tb, Dy on the earth. In the past several years, much attention has been attracted to the permanent magnet without rare earth[1], such as Zr2Co11, HfCo7 and Mn-based alloys, and excellent performance has been observed. For example,...
The (La1−yPry)1−xCaxMnO3 systems has been extensively studied in recent years as a typical electronic phase separation(PS) system. [1-4] As well known, the average radius of A sites in the ABO3 structure plays a key role in determining the band (W) and electronic characteristics of the perovskite manganites. Uehara et al has found that the chemical replacement of Pr for La (Pr is smaller than La)...
Growth and characterization of graphene grown using copper foils as well as copper films on silicon dioxide on silicon substrates were performed. Kinetics of growth and effective activation energy for the graphene synthesis will be discussed for the surface catalytic synthesis of graphene. Conditions for large-scale synthesis of monolayer graphene will be addressed in this talk. Wafer-scale graphene...
Graphene, a true two-dimensional material with extraordinary mechanical- and electronic properties, is thought to be ideal for nanoelectromechanical systems (NEMS), like mass- and force sensors. Here, we present two different ways to fabricate suspended graphene for the intended use in future NEMS applications. The fabrication schemes do not require transfer of graphene from a catalyst where the graphene...
Summary form only given. Large scale SiC/SiO2 nanowires have been synthesized on Si (100) by the reaction of methane with silica using iron as catalyst. The growth time was 10 mins and the growth temperature was around 1,250°C in a normal atmospheric pressure. Detailed investigation with scanning electron microscopy (SEM), energy-dispersed X-ray (EDX), X-ray diffraction (XRD) and transmission electron...
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