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  • THERMODYNAMICS  (1)
  • aluminide diffusion coatings  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Volatile species in halide-activated diffusion coating packs (1992)
    Springer
    Oxidation of metals 38 (1992), S. 33-43 
    Details
    ISSN: 1573-4889
    Keywords: Pack cementation ; aluminide diffusion coatings ; metal halide vapors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An atmospheric pressure sampling mass spectrometer was used to identify the vapor species generated in a halide-activated, cementation pack. Pack powder mixtures containing a Cr-Al binary masteralloy powder, an NH4Cl activator salt, and either ZrO2 or Y2O3 (or neither) were analyzed at 1000°C. Both equilibrium calculations for the pack and mass spectrometer results indicated that volatile AlClx and CrCly species were generated by the pack powder mixture; in packs containing the reactive element oxide, volatile ZrClz and YClw species were formed by the conversion of their oxide sources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00665043
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Thermodynamics of Selected Ti-Al and Ti-Al-Cr Alloys (1999)
    Springer
    Oxidation of metals 52 (1999), S. 537-556 
    Details
    ISSN: 1573-4889
    Keywords: Ti-Al ; Ti-Al-Cr ; THERMODYNAMICS ; KNUDSEN-CELL ; MASS SPECTROMETRY
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Two alloys in the Ti-Al system (Ti-45 a/o Al,Ti-62Al) and three alloys in the Ti-Al-Cr system(Ti-47Al-2Cr, Ti-47Al-13Cr, Ti-51Al-12Cr) were selectedfor a thermodynamic study because of interest in their high-temperature oxidation behavior. Activitiesof Al and Ti were measured using a twin Knudsen-cellassembly with one cell acting as an internal standard.For the Ti-45Al alloy, Al activity was also measured with an EMF technique. The Ti-Al-Cr data wereconsistent with the Al and Ti activities expected fromthe adjacent binary Ti-Al phase fields. Implications ofthis work on oxidation properties arediscussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018820401533
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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