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  1. No Access

    Article

    Microstructural and magnetic studies on P/M processed (Nd14.9Dy1.9)(Fe65.0Co8.0Cu1.0Ga1.0Nb0.7) B7.5 alloy

    Sintered samples of (Nd14.9 Dy1.9) (Fe65 Co8 Cu1.0 Ga1.0 Nb0.7)B7.5 were prepared and subjected to stepwise annealing in the temperature range 875 K–675 K. The XRD and metallographic (optical and electron microsc...

    S. Pandian, V. Chandrasekaran, K. J. L. Iyer… in Journal of Materials Science (2001)

  2. No Access

    Article

    Recent advances in 2 : 17 and 3 : 29 permanent magnet materials

    The structural and magnetic properties of 2 : 17 compounds, their nitrides and carbides and the recent development of the novel 3 : 29 compounds are discussed.

    K V S Rama Rao, G Markandeyulu, K G Suresh, V R Shah… in Bulletin of Materials Science (1999)

  3. No Access

    Article

    Diffusion of Carbon into RE2Fe17(RE=RARE Earth) Lattice: A High Temperature Approach

    The interstitial carbides HoErFe15Ga2Cy (y=0,0.5,1.0,1.5,2.0) were synthesized by are melting technique and characterized by X-ray diffraction and magnetization measurements. The hexagonal Th2Ni17 type structure ...

    M. Venkatesan, U. V. Varadaraju, K. V. S. Rama Rao in MRS Online Proceedings Library (1998)

  4. No Access

    Article

    Recent investigations on some cubic Laves phase compounds of rare earth and transition metals

    Pseudobinary alloy, Tb0·27Dy0·73Fe2−δ , belonging to C-15 cubic Laves phase having MgCu2-type structure, possesses large magnetostriction and high magnetomechanical coupling coefficient. T...

    K V S Rama Rao in Bulletin of Materials Science (1993)

  5. No Access

    Article

    Laser isotope separation of 13C: A comparative study

    IR laser chemistry of (CF3Br/Cl2) mixture and neat CF2HCl are examined in the context of 13C enrichment. Decomposition extent, enrichment factor and energy absorbed are measured for both systems at their respecti...

    V. Parthasarathy, S. K. Sarkar, N. V. Iyer, K. V. S. Rama Rao… in Applied Physics B (1993)

  6. No Access

    Article

    Carbon-13 enrichment by IR laser chemistry of CHF3-Cl2

    IR laser chemistry of CHF3 is investigated in both neat form and in the presence of Cl2 for carbon-13 enrichment. Infrared multiple-photon dissociation of CHF3 is an order of magnitude more efficient in the scave...

    V. Parthasarathy, S. K. Sarkar, K. K. Pushpa, K. A. Rao… in Applied Physics B (1993)

  7. No Access

    Article

    Abstracts

    J. Basu, K. K. Rohatgi-Mukherjee… in Proceedings of the Indian Academy of Scien… (1992)

  8. No Access

    Article

    TEA CO2 laser-induced photodissociation of UF6 via interspecies V-V energy transfer from multiple photon excited halomethanes

    The dissociation of UF6 sensitized by multiple photon excitation of a series of halomethanes: CF4, CF3Cl, and CF2Cl2 has been investigated. The roles of various experimental parameters like exciting frequency, fl...

    R. S. Karve, S. K. Sarkar, K. V. S. Rama Rao, J. P. Mittal in Applied Physics B (1991)

  9. No Access

    Article

    Selectivity enhancement in tritium isotope separation by multiple frequency multiple photon dissociation of the CTF3/CHF3 System

    Isotope separation of tritium by multiple photon dissociation process in multiple frequency fields of a TEA-CO2 laser is reported for the first time. A ten-fold improvement in the bulk selectivity was obtained in...

    R. S. Karve, A. K. Nayak, S. K. Sarlar, K. V. S. Rama Rao… in Applied Physics B (1989)

  10. No Access

    Article

    T/D isotope selectivity in CO2 laser induced multiple-frequency multiphoton dissociation of trifluoromethane-T

    Isotope-selective multiphoton dissociation of CTF3 in the presence of CDF3 by TEA CO2 laser is studied. The highest T/D selectivity of 58 was observed at a sample pressure of 2 Torr in the presence of 20 Torr of ...

    A. K. Nayak, R. S. Karve, S. K. Sarkar, K. V. S. Rama Rao… in Applied Physics B (1989)

  11. No Access

    Article

    Infrared laser multiple photon dissociation of thiophene in gas phase

    Infrared laser multiple photon excitation/dissociation of Thiophene (Th) was studied as a function of Th pressure, laser pulse energy, pulse duration and added buffer gas. While the excitation process was prob...

    A. K. Nayak, S. K. Sarkar, R. S. Karve, V. Parthasarathy… in Applied Physics B (1989)

  12. No Access

    Article

    Selective ir laser chemistry of CDF3 in natural fluoroform

    Selective decomposition of CDF3 at natural abundance level (≈150ppm) in fluoroform has been achieved by infra-red multiple-photon excitation at moderate substrate pressure using 100 ns FWHM CO2 laser pulses. Effe...

    V. Parthasarathy, S. K. Sarkar, K. V. S. Rama Rao, J. P. Mittal in Applied Physics B (1986)

  13. No Access

    Article

    Temperature dependence of79BrNQR frequency in cadmium strontium, barium, zinc, magnesium and nickel bromates

    The79Br quadrupole resonance in cadmium, strontium, barium, zinc, magnesium and nickel bromates is studied in the range 77 to 305 K. The temperature dependence of the resonance frequencies in these systems has be...

    S Ramaprabhu, R Valli, K V S Rama Rao in Pramana (1984)

  14. No Access

    Article

    Catalytic effects in reactions of chromium(III) part II: The role of excess ligand buffer in complexation of Cr(III) with some aminopolycarboxylic acids

    The complexation of Cr (III) by EDTA, HEDTA and DCTA is channelled through ion pair formation between Cr (III) and the ambient ligand species. The ion pair further undergoes deprotonation giving rise to hydrox...

    G. M. Phatak, K. V. S. Rama Rao, J. Shankar in Proceedings of the Indian Academy of Scien… (1976)