By Wolfgang Kurtz, Hans Vanecek, Ernst Koch

The current quantity maintains the outline of the chemical reactions of eiemental tungsten began with "Tungsten" Suppl. Vol. A 7. It covers the reactions with the steel components from zinc to actinoids. The therapy contains part diagrams, bulk reactions, and floor strategies which back are of exceptional significance in so much structures. The raader is observed the introductory feedback on pp. X/XI. Frankfurt am major Ernst Koch November 1987 Introductory comments Abbreviations so as to not overload the textual content, the subsequent abbreviations are often used with no definitions within the current quantity, as well as the abbreviations ordinary within the Gmelin instruction manual. a. c. alternating present AE Auger electron Auger electron spectroscopy(ic) or spectrum AES bcc body-centered cubic CPD touch capability distinction counts according to moment cps d. c. direct present DTA differential thermoanalysis Fermi Ievel EF EI electron influence ELS electron power loss spectroscopy or spectrum EMF, emf electromotive strength fcc face-centered cubic FE box emission box electron (emission) microscope(ic) FEM FES box emission spectroscopy FIM box ion microscope(ic) F-N Fowler-Nordheim hcp hexagonal close-packed 6 L Langmuir=1·10- Torr·s LEED low strength electron diffraction monolayer ML PES photoelectron spectroscopy PSD photon-stimulated desorption RHEED mirrored image excessive strength electron diffraction room temperature RT SI secondary ion SIMS secondary ion mass spectrometry TDS thermal desorption spectroscopy(ic) or spectrum TE thermionic emission overall power distribution TED UHV ultra-high vacuum UPS ultra-violet photoelectron spectroscopy(ic) or spectrum XPS X-ray photoelectron spectroscopy(ic) or spectrum Gmelin Handbock WSuppl. Vol.

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J. Nuel. 127 [1985] 56/66). Van der Kolk, G. , Oe Hosson, J. T. M. (Radiat. Eff. 84 [1985] 131 /58). Van der Kolk, G. , Oe Hosson, J. T. , et al. (Nuel. Instrum. Methods Phys. Res. Seet. B 6 [1985] 517/24). Boiko, B. A. A. 104 [1986] No. 213781). Morris, M. , Barnes, C. , King, 0. A. (Surt. Sei. 173 [1986] 618/38). Miedema, A. , de Boer, F. , [and Oorleijn, J. W. ] (CALPHAO 1 [1977] 341/59, 356, 359). 7 Thallium No phasediagram of the W-Tl system has been reported. A general study and theoretieal analysis of the alloying behavior of transition metals prediets the absenee of eompound formation and only a small solubility for this system [1].

However, field ion images of a tungsten tip covered with indium and heated above 900°C showed an entirely new cubic structure which may be due to the formation of an ordered In-W alloy [2]. The solubility of W in In is -4 x1o-s at% at 873 K [3]. No incorporation of vapor-deposited In into a W{1 00} single crystal, or alloy formation, was observed up to elevated temperatures in [19]. The heat of solution of Liquid W in Liquid In at infinite dilution is calculated as -135 kJ/mol, that of Liquid In in LiquidWas -171 kJ/mol [20].

99 eV [11]. 8% initial purity on the surface of a tungsten single crystal have been studied at a residual gas pressure of 10-9 Torr. 2 eV, was assumed to correspond to the completed monolayer. Under these conditions (optimum coverage), all the emission is from the W(111) face. At small degrees of coverage, the emission comes predominantly from the (1 00) region of the W surface [2, 3]. vs. 8 •> No minimum. - bl Values of and nsc at the maximum found. The values are in eV; the surface concentrations nsc and nw on the respective faces are in 1014 atoms/cm 2 .

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