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  • 1
    Electronic Resource
    Electronic Resource
    Beitrag zur Kenntnis des Systems Vanadin—Chrom—Stickstoff (1978)
    Springer
    Monatshefte für Chemie 109 (1978), S. 929-941 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The System V−Cr−N has been investigated at 1100 and 1400 °C and at nitrogen pressures between 1 and 1000 atmospheres by X-ray techniques. VN and CrN on the one hand and V2N and Cr2N on the other are forming complete series of solid solutions. The phase field of the mononitride solid solution is dependent on nitrogen pressure and temperature conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00907315
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  • 2
    Electronic Resource
    Electronic Resource
    Untersuchungen im System Cr-W-N (1978)
    Springer
    Monatshefte für Chemie 109 (1978), S. 1005-1008 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Investigations in the system Cr/W/N at 1100°C and at nitrogen pressures up to 300 bar lead to the conclusion that no apprecible solubility of W neither in CrN nor in Cr2N exists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00907322
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  • 3
    Electronic Resource
    Electronic Resource
    Beitrag zur Kenntnis des Systems Chrom-Mangan-Stickstoff (1978)
    Springer
    Monatshefte für Chemie 109 (1978), S. 1277-1285 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The system Cr−Mn−N has been investigated by X-ray technique in three isothermal sections at 800, 1,000 and 1,200°C and at nitrogen pressures ranging from 1 to 800 atm. The binary compounds Cr2N and Mn2N form a complete series of solid solutions. The mononitride phase field extends from CrN to (Cr0.21Mn0.79)N0.80 at 1,000°C and 800 atm N2, whereas at normal pressure only a small portion of chromium atoms in CrN can be substituted by manganese atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00906039
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  • 4
    Electronic Resource
    Electronic Resource
    Über die Präparation und die Eigenschaften von Molybdän-Wolfram-Carbonitriden (1982)
    Springer
    Monatshefte für Chemie 113 (1982), S. 869-876 
    Details
    ISSN: 1434-4475
    Keywords: Carbonitrides ; Molybdenum ; Tungsten
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Molybdenum-tungsten-carbonitrides can be prepared by reacting prealloyed powders of Mo and W with carbon in the presence of nitrogen or ammonia. Single phase carbonitrides (Mo, W) (C, N) with the WC-type structure can be obtained. The nitrogen content of these carbonitrides increases with increasing molybdenum content. Flowing ammonia has a decarburizing effect, which has to be counterbalanced by an addition of a carbonaceous gas such as methane. Nitrogen instead of ammonia is equally effective and gives carbonitrides which have a nitrogen content only insignificantly lower than the carbonitrides obtained in flowing ammonia. The lattice parameters of the carbonitrides are found to be slightly smaller than the lattice parameters of the corresponding carbides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00799227
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  • 5
    Electronic Resource
    Electronic Resource
    Neue Entwicklungen auf dem Gebiet der Hartstoffe und HartmetalleVortrag auf der Tagung „Hartstoffe“ der Fachgruppe „Festkörperchemie“ der Gesellschaft Deutscher Chemiker, 5./6. April 1973 in Lindau/Bodensee. (1974)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 46 (1974), S. 843-852 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Die Neuentwicklungen der letzten vier Jahre auf dem Gebiet der Hartstoffe und Hartmetalle werden kurz kommentiert. Neuartige HfC- bzw. NbC-haltige Hartmetalle auf WC-Basis und WC-freie (Ti,Mo)C-basierte bzw. Titancarbonitrid-Hartmetalle haben sich in der Praxis bewährt, während sich Hartmetalle auf TaN-Basis noch im Versuchsstadium befinden. Für den schweren Schnitt scheinen Schmelzcarbide (cast carbides) aus dem System TiC-W besonders geeignet zu sein. Die Beschichtung von Hartmetallen mit Carbid- und insbesondere Nitrid-Schichten hat bereits technische Bedeutung erlangt. Unter Diamantsynthese-Bedingungen gesinterte polykristalline Diamant-Werkzeuge sind vor allem zur spanabhebenden Bearbeitung von spröden und schwierig zu bearbeitenden Werkstoffen. geeignet. In der Hartmetall-Technologie haben sich besonders die Attritor-Mahlung von Hartmetall-Ansätzen zur Erzeugung extrem feinkörniger Gefüge, die Sprühtrocknung des Mahlgutes und die heißisostatische Verdichtung von Hartmetallen eingeführt.
    Additional Material: 21 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330462003
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  • 6
    Electronic Resource
    Electronic Resource
    Principles and Latest Developments in the Field of Metallic and Nonmetallic Hard MaterialsLecture presented by R. Kieffer October 17, 1969 at the 161st Dechema Colloquium in Frankfurt/Main. (1970)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 9 (1970), S. 926-936 
    Details
    ISSN: 0570-0833
    Keywords: Hard materials ; Materials science ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A survey of some fundamental aspects of the theory of hardness is followed by a discussion of recent developments in the field of sintered hard metal alloys. For example, good results have been obtained by the addition of hafnium carbide to hard metals. Niobium carbide can sometimes replace the more expensive tantalum carbide; vanadium carbide can be used to inhibit grain growth, especially in the case of ultrafine carbides. A brief outline is given of the results of investigations on ternary and quaternary systems with the components TiC, HfC, NbC, TaC, and WC. The utilization of sintered nitride and carbonitride hard metals in the field of machining appears feasible. Recently developed high-pressure/high-temperature autoclaves permit work on nitride systems under a high nitrogen pressure. The authors comment on the latest work in the field of non-metallic hard materials and on diamond synthesis.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.197009261
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