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  • phosphorus
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  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (2)
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    Electronic Resource
    Electronic Resource
    Springer
    Oxidation of metals 23 (1985), S. 177-189 
    ISSN: 1573-4889
    Keywords: sintered ferritic stainless steel composite ; porosity ; transition metals ; phosphorus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The oxidation behavior of sintered ferritic stainless steel-Al2O3 composites, and composites with ternary additions such as titanium, niobium, or phosphorus, have been studied at 550°C in 1 atm oxygen up to 9 hr. It is found that α-SS-6 vol.% Al2O3 is most resistant to oxidation amongst all the compacts investigated. Amongst the ternary composites, niobium-containing compacts show better oxidation resistance compared to titanium or phosphorus-containing composites.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-4889
    Keywords: TiAl ; oxidation ; phosphorus ; microdiffraction ; doping ; rutile
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Recently it has been found that very small amounts (a few 100 ppm) of Padded to γ -titanium aluminide can significantly alter the oxidationbehavior between 973 and 1273 K. The mechanism responsible for this changeis, however, still not clear. In the present study, phosphorus wasincorporated into the surface of TiAl (containing 50 at.% Al) by ionimplantation and oxidation tests were carried out at 1173 K inair. Improvement of oxidation resistance is only temporary up to 100 hr forphosphorus-implanted TiAl. After 100 hr, the oxidation rate increases andbreakaway oxidation follows. XRD and EPMA showed that the breakawayoxidation is connected with massive nitride formation. Two different modelsare proposed which can explain the effect of phosphorus additions on theoxidation kinetics of TiAl during the protective stage within the first100 hr. The breakaway effect can be explained by penetration of air to themetal–oxide interface zone because of microcrack formation in theoxide scale, which was experimentally proved by acoustic-emission analysis.
    Type of Medium: Electronic Resource
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