Skip to main content

19 Result(s)

within A. Joshi Remove this filter Materials Science Remove this filter

and

  1. No Access

    Article

    Solid state interfacial reactions of Ti3Al with Si3N4 and SiC

    Solid state interfacial reactions of Ti3Al with Si3N4 and SiC have been studied via both bulk and thin film diffusion couples at temperatures of 1000 and 1200 °C. The nature of reactions of Ti3Al with Si3N4 and S...

    T. C. Chou, A. Joshi in Journal of Materials Research (1992)

  2. No Access

    Article

    Erosion of diamond films and graphite in oxygen plasma

    The nature and rates of erosion of diamond, graphite, and diamond-like carbon (DLC) films exposed to oxygen plasmas were evaluated by comparison of surface morphological changes and weight losses. The RF plasm...

    A. Joshi, R. Nimmagadda in Journal of Materials Research (1991)

  3. No Access

    Article

    Solid state reactions of SiC with Co, Ni, and Pt

    Solid state reactions between SiC ceramics and Co, Ni, and Pt metals have been studied at temperatures between 800 and 1200 °C for various times under He or vacuum conditions. Reactions between the metals and ...

    T. C. Chou, A. Joshi, J. Wadsworth in Journal of Materials Research (1991)

  4. No Access

    Article

    High-temperature interactions of refractory metal matrices with selected ceramic reinforcements

    Interdiffusion and reactions occurring at high temperatures between refractory metals (Nb and Ta) and ceramic materials (SiC and A12O3) have been investigated. Diffusion couples were fabricated by depositing Nb a...

    A. Joshi, H. S. Hu, L. Jesion, JJ. Stephens, J. Wadsworth in Metallurgical Transactions A (1990)

  5. No Access

    Article

    Role of microstructure on the oxidation behavior of microwave plasma synthesized diamond and diamond-like carbon films

    Oxidation kinetics of microwave plasma assisted CVD diamond and diamond-like carbon (DLC) films in flowing oxygen were evaluated in the temperature range of 500 to 750 °C and were compared with those of graphi...

    Rao R. Nimmagadda, A. Joshi, W. L. Hsu in Journal of Materials Research (1990)

  6. No Access

    Article

    The nucleation and morphology of diamond crystals and films synthesized by the combustion flame technique

    The nucleation and morphology of diamond crystals and films synthesized by the use of a combustion flame have been investigated. By operating an oxy-acetylene torch in a fuel-rich mode, diamond crystals and fi...

    K. V. Ravi, C. A. Koch, H. S. Hu, A. Joshi in Journal of Materials Research (1990)

  7. No Access

    Article

    High-resolution auger electron spectroscopy of grain boundary phosphorus segregation in NiCrMoV and NiCr steels

    J. E. Wittig, A. Joshi in Metallurgical Transactions A (1990)

  8. No Access

    Article

    Reaction between niobium and silicon carbide at 1373 K

    The reaction zone formed between niobium and silicon carbide during heating for 4 h at 1373 K was examined by transmission electron microscopy (TEM) and Auger electron spectroscopy (AES). The typical reaction ...

    D. L. Yaney, A. Joshi in Journal of Materials Research (1990)

  9. No Access

    Article

    Microstructural evaluation of arc-melted Al-Li-Be alloys

    A microstructural investigation has been carried out on a series of small castings of arc-melted Al-Li-Be alloys. The alloy composition included amounts of lithium up to 3wt% and beryllium up to 10wt%. Optical...

    J. Wadsworth, A. Joshi, D. D. Crooks, A. E. Vidoz in Journal of Materials Science (1986)

  10. No Access

    Article

    Microstructural evaluation of arc-melted Al-Li-Be alloys

    A microstructural investigation has been carried out on a series of small castings of arc-melted Al-Li-Be alloys. The alloy composition included amounts of lithium up to 3wt% and beryllium up to 10wt%. Optical...

    J. Wadsworth, A. Joshi, D. D. Crooks, A. E. Vidoz in Journal of Materials Science (1986)

  11. No Access

    Article

    A study of the chemical composition of grain boundaries and creep cavity surfaces in a Cu-Sb alloy

    Chemical compositions of grain boundaries and creep cavity surfaces in Cu + 0.5 at. pct Sb have been measured quantitatively using Auger Electron Spectroscopy. The grain boundary enrichment ratio for antimony ...

    K. S. Yu, A. Joshi, W. D. Nix in Metallurgical Transactions A (1983)

  12. No Access

    Article

    Effect of Heat Treatment on Solute Concentration at Grain Boundaries in 7075 Aluminum Alloy

    The effect of heat treatment on the relative amounts of magnesium, zinc, copper, iron and silicon in grain boundaries of aluminum 7075 alloy was investigated with Auger electron spectroscopy in a scanning Auge...

    A. Joshi, C. R. Shastry, M. Levy in Metallurgical Transactions A (1981)

  13. No Access

    Article

    Atomistic Details of the Fracture Path in Temper-Embrittled Low Alloy Steels

    John. F. Moulder, A. Joshi in Metallurgical Transactions A (1981)

  14. No Access

    Article

    The effect of fe additions on the embrittlement of Cu-Bi alloys

    The effect of iron additions on the embrittlement of Cu-Bi alloys was studied by monitoring the ductility and grain boundary chemistry of embrittled specimens as a function of iron content. Mechanical properti...

    W. C. Johnson, A. Joshi, D. F. Stein in Metallurgical Transactions A (1976)

  15. No Access

    Article

    Identification of atomic boron in steel by auger electron spectroscopy

    A. P. Coldren, A. Joshi, D. F. Stein in Metallurgical Transactions A (1975)

  16. No Access

    Article

    Effect of microstructure on the temper embrittlement of Cr-Mo-V steels

    The effect of transformation product on the temper embrittlement susceptibility of a Cr-Mo-V steel doped with P and Sn has been investigated at different strength levels. Results show that at low strength leve...

    R. Viswanathan, A. Joshi in Metallurgical Transactions A (1975)

  17. No Access

    Article

    Role of Mn and Si in temper embrittlement of low alloy steels

    A. Joshi, P. W. Palmberg, D. F. Stein in Metallurgical Transactions A (1975)

  18. No Access

    Article

    Surface segregation and interaction of oxygen and nitrogen with zirconium in Nb-1% Zr alloy

    Surface segregation and interaction of zirconium, oxygen and nitrogen were studied in a Nb-1 pct Zr alloy utilizing Auger electron spectroscopy. Segregation of oxygen to the surface occurs at temperatures as l...

    A. Joshi, M. N. Varma, M. Strongin in Metallurgical transactions (1974)

  19. No Access

    Article

    Intergranular brittleness studies in Tungsten Using Auger Spectroscopy

    The present investigation was aimed at understanding the problem of brittleness in powder metallurgy tungsten by utilizing Auger Electron Emission Spectroscopy as a tool for direct chemical analysis of fractur...

    A. Joshi, D. F. Stein in Metallurgical Transactions (1970)