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  • Chemistry  (10)
  • Nederland
  • Magnetism
  • 1980-1984  (10)
  • 1982  (10)
  • 1
    Electronic Resource
    Electronic Resource
    Schwingungsrißkorrosion an plasmanitriertem stahlAuszugsweise vorgestellt auf der Hauptversammlung der Deutschen Gesellschaft für Metallkunde 1982 in Villach (1982)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 33 (1982), S. 647-653 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Corrosion fatigue of plasmanitrided steelThe effect of plasma-nitriding of steel 34 CrAlMo 5 on corrosion fatigue has been investigated in cyclic torsion. The tests were conducted in air, tap water and artifical sea water. Crack initiation and propagation have been studied by means of metallographic and fractographic methods to identify the fatigue mechanisms.Main results may be summarized as follows: The fatigue strength increases by about 40% due to plasma-nitriding over that of nonnitrided steel when tested in air. Even in corrosion environment plasma-nitriding improves remarkably the fatigue strength. The torsional fatigue strength of plasmanitrided specimen is not affected by the presence of tap water. In artifical sea water the distinct fatigue limit disappears. However, the fatigue life of the plasmanitrided specimen increases by factor of 10 compared with that of non-nitrided specimen. The reasons for this improvement were discussed by considering the mechanical and metallurgical aspects of the problems.
    Notes: Das Schwingungsrißkorrosionsverhalten von plasmanitriertem Stahl 34 CrAlMo 5 wurde in Torsionswechselversuchen an Luft, in Leitungswasser und in künstlichem Meerwasser untersucht. Rißbildung und Rißausbreitung wurden mittels metallographischer und fraktographischer Untersuchungsmethoden analysiert. Die Ergebnisse lassen sich folgendermaßen zusammenfassen: Durch das Plasmanitrieren wird an Luft eine Steigerung der Dauerfestigkeit um 40% gegenüber dem unbehandelten Zustand erreicht. Auch bei Einwirkung eines korrosiven Mediums bewirkt die Plasmanitrierschicht eine wesentliche Verbesserung des Dauerschwingverhaltens. Die Torsionswechselfestigkeit des plasmanitrierten Werkstoffes wird von einer Leitungswasserumgebung nicht beeinträchtigt. Im künstlichen Meerwasser existiert sowohl im unbehandelten als auch im plasmanitrierten Werkstoffzustand keine Dauerfestigkeit. Die Lebensdauer des plasmanitrierten Werkstoffes ist jedoch um eine Zehnerpotenz größer als die des unbehandelten Werkstoffes. Für die dargestellten Versuchsergebnisse werden verschiedene Deutungsmöglichkeiten diskutiert.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19820331202
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  • 2
    Electronic Resource
    Electronic Resource
    Zur Kenntnis neuer Fluoride des Typs Ba2MIIMIIIF9 [1] Ba2MII AlF9, Ba2 MII GaF9, Ba2MII CoF9 und Ba2MII NiF9 mit MII = Co, Ni, Zn und Mg (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 493 (1982), S. 59-64 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Fluorides of the Type Ba2MIIMIIIF9: Ba2MIIAlF9, Ba2MIIGaF9, Ba2MIICoF9, and Ba2MIINiF9 with MII = Co, Ni, Zn, and MgFluorides of the type Ba2MIIMIIIF9 appear in 3 different structures: Fluorides with MIII = Al crystallize orthorhombic (Ba2ZnAlF9-type of structure), or (MIII = metal of 3d series) in a monoclinic distorted variant (exeption: Ba2NiGaF9 in the case MII = Mg a tetragonal unit cell (Ba2MnFeF9-type of structure) is found.
    Notes: Fluoride des Typs Ba2MIIMIIIF9 treten in 3 unterschiedlichen Strukturen auf: Fluoride mit MIII=Al kristallisieren orthorhombisch (Ba2ZnAlF9-Typ) oder MIII=Metall der 3d-Reihe) in einer monoklin verzerrten Variante (Ausnahme: Ba2NiGaF9); für den Fall MII = Mg findet man eine tetragonale Elementarzelle (Ba2MnFeF9-Typ).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824930108
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  • 3
    Electronic Resource
    Electronic Resource
    Neues über Pentafluorometallate(III). SrNiF5, BaNiF5, BaCoF5 und CdCoF5 (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 490 (1982), S. 111-120 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: News on Pentafluoro Metallates(III), SrNiF5, BaNiF5, BaCoF5, and CdCoF5Samples of BaNiF5 and for the first time SrNiF5 have been prepared by pressure fluorination (monel-autoclaves, pF2 = 50 bar, 400°C, 48 h and pF2 = 20-30 bar, 420 ± 30°C, 4 d, respectively). On the other side BaCoF5 and CdCoF5 are obtained by heating in a diluted stream of F2.Crystal data are BaNiF5: light grey-violet, orthorhombic, a = 987.3(1), b = 547.19(6), c = 743.87(8) pm; SrNiF5; dark-brown, BaGaF5-type of structure, a = 1 326.5(2), b = 544.04(6), c = 492.69(5) pm; BaCoF5: light blue, orthorhombic, a = 1 392.2(2), b = 562.01(7), c = 496.50(6) pm; CdCoF5: light blue, a = 878.7(2), b = 641.01(8), c = 749.5(2) pm, β = 115.27(2)°, CaCrF5-type of structure.The Madelung Part of Lattice Energy, MAPLE, of SrNiF5 and CdCoF5 is discussed.
    Notes: Durch Fluorierung unter erhöhtem Druck (Monel-Autoklav, pF2 = 50 bar, 400°C, 48 h) wurden hellgrauviolette Proben von BaNiF5 (orthorhombisch, a = 9,873(1); b = 5,4719(6); c = 7,4387(8) Å) sowie erstmals braunes (Monel-Autoklav, pF2 = 20-30 bar, 420 ± 30°C, 4 d) SrNiF5 (BaGaF5-Typ, a = 13,265(2); b = 5,4404(6); c = 4,9269(5) Å) erhalten.Dagegen entstehen hellblaue Pulver von BaCoF5 (orthorhombisch; a = 13,922(2); b = 5,6201(7); c = 4,9650(6) Å) und CdCoF5 (CaCrF5-Typ; a = 8,787(2); b = 6,4101(8); c = 7,495(2) Å, β = 115,27(2)°) bereits im verdünnten Fluorstrom.Der Madelunganteil der Gitterenergie, MAPLE, von SrNiF5 und CdCoF5 wurde diskutiert.
    Additional Material: 13 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824900113
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  • 4
    Electronic Resource
    Electronic Resource
    Pre-chromatographic derivatization of samples for (HP)TLCBased on a paper read at the second international Symposium of Instrumental Thin-layer Chromatography, May 1982, Interlaken. Switzerland. (1982)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 5 (1982), S. 534-538 
    Details
    ISSN: 0935-6304
    Keywords: Thin-layer chromatography, (HP)TLC ; Pre-chromatographic derivatization ; Quantitation of estriol, cortisol, selenium ; Biological matrix ; Water analysis ; Ready-for-use column extraction ; Fluorescence enhancement ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240051004
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  • 5
    Electronic Resource
    Electronic Resource
    The use of chemically bonded stationary phases in thin-layer chromatography-a surveyBased on a paper presented at the Second Intemational Symposium on Instrumental High Performance Thin Layer Chromatography, Interlaken, May 1982. (1982)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 5 (1982), S. 476-482 
    Details
    ISSN: 0935-6304
    Keywords: Thin-layer chromatography, TLC ; Reversed phase TLC ; Chemically bonded stationary phases ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An overview is given of the literature publisned in the field of thin-layer chromatography on chemically bonded phases. Aspects which merit further attention are: quantitative analysis, organic solvent selection, stationary phase characteristics, surface modification of precoated silica plates, ion-pair chromatography and correlation of thin-layer and column chromatographic data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240050905
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  • 6
    Electronic Resource
    Electronic Resource
    Analysis of nitrated polycyclic aromatic hydrocarbons by glass capillary gas chromatography using different detectors (1982)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 5 (1982), S. 19-26 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography, glass capillary ; Selective detection ; Nitrated polycyclic aromatic hydrocarbons ; Carbon black ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Glass capillary gas chromatography has been investigated as a method for the analysis of nitrated polycyclic aromatic hydrocarbons (nitro-PAH) using both splitless and on-column injection techniques. The nitro-PAH showed good chromatographic performance and thermal stability under the GC conditions used. Retention times and response factors of several nitro-PAH were compared to those of conventional PAH.Simultaneous flame ionization and thermionic nitrogen selective detection was used to facilitate identification of nitro-PAH in complex samples. The feasibility of the method is demonstrated on two samples of commercial carbon black. Besides 1-nitropyrene several isomeric dinitropyrenes have been identified.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240050104
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Dimorphie von BaNiF6 (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 489 (1982), S. 7-10 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dimorphism of BaNiF6By pressure fluorination synthesis bright carmine red samples of Ba[NiF6] (monoclinic, a = 9.465; b = 4.950; c = 9.516 Å, β = 103.4°; Z = 4) are obtained. The trigonal modification (BaGeF6-type of structure, a = 7.268; c = 6.981 Å, Z = 3) is formed under static pressure (300°C, 50 kbar) only. The bond length Ni—F = 1.78 Å is discussed by means of the Madelung Part of the Lattice Energy, MAPLE. The magnetic behaviour is studied.
    Notes: Bei der Fluorierung unter erhöhtem Druck entstehen karminrote Proben von Ba[NiF6](monoklin, a = 9.465; b = 4,950; c = 9,615 Å; β =103,4°; Z = 4) Erst unter statischem Druck (300°C, 50 kbar) entsteht die trigonale Form (BaGeF6-Typ, a = 7,268; c = 6,981 Å, Z = 3). Die Bindungslänge Ni—F = 1,78 Å wurde über MAPLE-Rechnungen bestimmt. Das magnetische Verhalten wird diskutiert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824890102
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  • 8
    Electronic Resource
    Electronic Resource
    Beiträge zum thermischen Verhalten von Sulfaten. VI. Zum chemischen Transport von CuSO4, Cu2OSO4 und CuO (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 492 (1982), S. 208-208 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824920124
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  • 9
    Electronic Resource
    Electronic Resource
    Zur Kenntnis von Li2NiF5 und Na2NiF6Professor Werner Fischer zum 80. Geburtstage am 21. August 1982 gewidmet (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 490 (1982), S. 7-10 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Li2NiF5 and Na2NiF6.For the first time pure samples of Na2[NiF6] (carmine red; monoklinic, a = 7.564, b = 5.686, c = 5.378 Å, β = 92.28°; Z = 2) have been obtained by pressure fluorination (monel-autoklavs, pF2 = 300 bar, 300°C, 18h) and indexed.Similarly (monel-autoklavs, pF2 = 300 bar, 300°C, 10h) samples of Li2NiF5 (violet; monoclinic, a = 9.788, b = 4.886, c = 9.966 Å; β = 135.56°; Z = 4) have been prepared.
    Notes: Durch Fluorierung unter erhöhtem Druck (Monel-Autoklav, PF2 = 300 bar, 300°C, 18 h) konnten erstmals reine Proben von Na2[NiF6] (karminrot; monoklin, a = 7,564, b = 5,686, c = 5,378 Å; β = 92,28°; Z = 2) dargestellt und indiziert werden.Ebenfalls unter erhöhtem Fluordruck (Monel-Autoklav, pF2 = 300 bar, 300°C, 10h) wurden violette Proben von Li2NiF5 (monoklin, a = 9,788, b = 4,886, c = 9,966 Å; β = 135,56°; Z = 4) erhalten.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824900102
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  • 10
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Phosphors. 115. Synthese und Eigenschaften des Tetraphospha-silaspiro-[2.2]pentans (PBut)2Si(PBut)2Professor Rudolf Hoppe zum 60. Geburtstage gewidmet (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 491 (1982), S. 27-33 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 115. Synthesis and Properties of the Tetraphospha-silaspiro[2.2] pentane (PBut)2Si(PBut)2The first spirocyclic phosphorus-silicon three-membered ring compound, 1,2,4,5-tetra-tert-butyl-1,2,4,5-tetraphospha-3-silaspiro[2.2]pentane, (PBut)2Si(PBut)2 (1), has been synthesized by cyclocondensation of K(But)P—P(But)K with silicon tetrachloride in the molar ratio of 2:0.9. It was characterized by elemental analysis, cryoscopic molecular weight determination and its mass, magnetic resonance and vibrational spectra. 1 is formed as a mixture of two diastereomers 1a and 1b. These differ in the relative arrangement of the trans-oriented organyl substituents at the two three-membered rings; both isomers could be obtained in a pure state. The sterically less favoured isomer 1b rearranges into the comparatively more stable isomer 1a.
    Notes: Die erste spirocyclische Phosphor-Silicium-Dreiringverbindung, das 1,2,4,5-Tetra-tert-butyl-1,2,4,5-tetraphospha-3-silaspiro[2.2]pentan, (PBut)2Si(PBut)2 (1), wurde durch Cyclokondensation von K(But)P—P(But)K mit Siliciumtetrachlorid im Molverhältnis 2:0,9 synthetisiert. Die Charakterisierung erfolgte durch Elementaranalyse, kryoskopische Molmasse-Bestimmung, Massen-, Kernresonanz- und Molekülschwingungsspektren. 1 entsteht als Gemisch von zwei Diastereomeren 1a und 1b, die sich in der Anordnung der jeweils trans-ständigen Organylgruppen beider Dreiringe zueinander unterscheiden; beide Isomere konnten rein erhalten werden. Das sterisch ungünstigere Isomer 1 b lagert sich in das vergleichsweise beständigere Isomer 1 a um.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824910104
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