Ch. Suryanarayana

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Mechanical alloying (MA) is a solid-state powder processng technique involving repeated welding, fracturing, and rewelding of powder particles in a high-energy ball mill. Originally developed to produce oxide-dispersion strengthened (ODS) nickeland iron-base superalloys for applications in the aerospace industry, MA has now been shown to be capable of(More)
Accurate and reliable prediction of the groundwater level variation is significant and essential in water resources management of a basin. The situation is complicated by the fact that the variation of groundwater level is highly nonlinear in nature because of interdependencies and uncertainties in the hydro-geological process. Models such as Artificial(More)
Mechanical alloying (MA) is a powder metallurgy processing technique involving cold welding, fracturing, and rewelding of powder particles in a high-energy ball mill, and has now become an established commercial technique to produce oxide dispersion strengthened (ODS) nickeland iron-based materials. MA is also capable of synthesizing a variety of metastable(More)
An efficient synthetic approach for 2,5-disubstituted pyrimidines has been reported. The desired 2,5-substituted pyrimidines were obtained by Suzuki coupling of 2-substituted benzyloxy-5-bromopyrimidines with various aryl boronic acids in the presence catalytic amount of PdCl2(PPh3)2 with 0.5 M aqueous Na2CO3 in water at 80 °C.(More)
Good ductility, low magnetic susceptibility, and tunable Young's modulus are highly desirable properties for materials usage as spinal fixation rods. In this study, the effects of niobium content on the microstructure, magnetic susceptibility, and mechanical properties of Zr-xNb (13≤x≤23wt%) alloys were investigated. For the Zr-15Nb and Zr-17Nb alloys, a(More)
Ein neues interferenzoptisches Analogieverfahren ffir Fourier-Transformafionen Ein Nach te i l der b e u g u n g s o p t i s c h e n Ana log ieve r f ah ren die insbesondere bet unpe r i od i s chen M ot i ven sehr kleine Be leuch tnngss t i i rke i m Beugungsb i l d (in gf ins t igen F~llen wenig fiber der Grenzempf ind l i chke i t des Auges) konn te l )(More)
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