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  • 1
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. During belt grinding the maximum contact temperatures are half those that occur during grinding with abrasive wheels. 2. With increasing temperatures in the grinding zone there are substantial changes in the phase composition of the surface layer, which can be used to determine the quality of the surface layer. 3. It is recommended that the maximum temperature in the grinding zone not exceed 200–300° during belt grinding of carburized parts of steel 12Kh2N4A.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tetraphenyl Imidodiphosphate as Ligand in Fluoro Complexes. 3. Fluoro Complexes of Niobium, Tantalum, and AntimonyTetraphenyl imidodiphosphate forms with NbF5, TaF5, and SbF5 the addition complexes MF5 · LH and (MF5)2(μ-LH). The imidodiphosphate acts in the latter as bidentately bridging ligand. Furtheron, it reacts with NbF5 and TaF5 by replacing fluoride forming tetrafloro and trifluoro complexes: [MF4(μ-L)]2 and MF3(η2-L)(OPh) or μ-O[MF3(η2-L)]2, resp., (M = Nb, Ta). SbF5 does not form substitution complexes. The constitution and conformation of the complexes have been concluded from n.m.r. spectroscopic data.
    Notes: Imidodiphosphorsäuretetraphenylester, (PhO)2P(O)NHP(O)(OPh)2 (LH), bildet mit NbF5, TaF5 und SbF5 in Acetonitril Additionskomplexe der Zusammensetzung MF5 · LH und (MF5)2(μ-LH). In letzteren fungiert der Ester als zweizähniger Brückenligand. Mit NbF5 und TaF5 reagiert er darüber hinaus unter Fluoridsubstitution zu Tetrafluoro- und Trifluorokomplexen: [MF4(μ-L)]2 und MF3(η2-L)(OPh) bzw. μ-O[MF3(η2-L)]2 (M = Nb, Ta). SbF5 bildet keine Substitutionskomplexe. Die Konstitutions- und Konformationsaussagen beruhen auf NMR-spektroskopischen Befunden.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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