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  • oxidation  (22)
  • Springer  (22)
  • Periodicals Archive Online (PAO)
  • 2000-2004  (12)
  • 1980-1984  (10)
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Keywords
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  • Springer  (22)
  • Periodicals Archive Online (PAO)
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    The oxidation of Ni-70 wt.%Cr in oxygen between 1073 and 1473°K (1980)
    Springer
    Oxidation of metals 14 (1980), S. 263-277 
    Details
    ISSN: 1573-4889
    Keywords: oxidation ; Ni-Cr alloys ; two-phase alloys
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Oxidation of the relatively simple, two-phase alloy Ni-70 wt.%Cr in oxygen between 1073 and 1473°K results in the formation of a Cr2O3 scale containing less than O.5 wt.% Ni in solid solution. The oxidation kinetics are irreproducible for an initial period, which is brief at 1073 and 1273°K but much more pronounced at 1473°K, both in duration and degree. This behavior is associated with the failure of the protective Cr2O3 scale. However, after longer periods a compact layer of Cr2O3 becomes established under isothermal conditions and results in a change to more reproducible kinetics, especially at 1073 and 1273°K. Oxidation causes chromium depletion and the formation of a single-phase zone which separates the scale and the two-phase bulk alloy. The depth of Cr2O3 internal oxide coincides with this zone. The oxidation behavior is compared with that of more Ni-rich, single-phase Ni-Cr alloys, with particular reference to the effects of the constitution of the underlying alloy and the integrity of the protective oxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00604568
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  • 2
    Electronic Resource
    Electronic Resource
    Oxidation of nickel-manganese alloys in the temperature range 873–1273 K (1982)
    Springer
    Oxidation of metals 18 (1982), S. 295-314 
    Details
    ISSN: 1573-4889
    Keywords: Nickel-manganese alloys ; oxidation ; solid solution scales ; internal oxidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Ni-Mn alloys containing up to 38% Mn have been oxidized in pure oxygen between 873 and 1273 K and the parabolic rate constants measured. The scale morphologies and oxide compositions are interpreted in terms of modifications to the scale on pure Mn caused by the presence of Ni. The scales are composed predominantly of two layers at all temperatures, giving the sequences of phases alloy/cubic monoxide (Ni, Mn)O/ternary spinel, with the cubic (Ni, Mn)O layer always having the greater thickness. There is limited evidence for a third, very thin, outer layer in the scales on all alloys at 873 K and for Ni-38%Mn at 1073 K, which is tentatively considered to be Mn2O3, giving layers in the order alloy/cubic monoxide/ternary spinel/Mn2O3, by analogy with the scale formed on pure Mn. The distribution of the alloy components in the scale is discussed in relation to the Ni-Mn-O phase diagram and in terms of recent theoretical treatments of solid solution scale formation on binary alloys, as far as the available diffusion data allow. The occurrence of internal and intergranular oxidation and the formation of a Mn-depleted zone coincident with the band of uniform internal oxide are considered briefly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00656573
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  • 3
    Electronic Resource
    Electronic Resource
    An efficient Fmoc strategy for the rapid synthesis of peptide para-nitroanilides (2000)
    Springer
    International journal of peptide research and therapeutics 7 (2000), S. 347-351 
    Details
    ISSN: 1573-3904
    Keywords: chromogenic substrates ; oxidation ; Oxone® ; para-nitroanilides ; solid-phase synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A new strategy has been developed for the rapid synthesis of peptide para-nitroanilides (pNA). The method involves derivatization of commercially available tritylchloride resin (TCP-resin) with 1,4-phenylenediamine, subsequent coupling with desired amino acids by the standard Fmoc protocol, and oxidation of the intermediate para-aminoanilides (pAA) with Oxone®. This procedure allows easy assembly of the desired para-aminoanilides (pAA) on standard resin and efficient oxidation and purification of the corresponding para-nitroanilides (pNA). The method allows easy access to any desired peptide para-nitroanilides, which are useful substrates for the characterization and study of proteolytic enzymes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02443598
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  • 4
    Electronic Resource
    Electronic Resource
    An efficient Fmoc strategy for the rapid synthesis of peptide para-nitroanilides (2000)
    Springer
    International journal of peptide research and therapeutics 7 (2000), S. 347-351 
    Details
    ISSN: 1573-3904
    Keywords: chromogenic substrates ; oxidation ; Oxone® ; para-nitroanilides ; solid-phase synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A new strategy has been developed for the rapid synthesis ofpeptide para-nitroanilides (pNA). The method involves derivatization of commercially available tritylchloride resin(TCP-resin) with 1,4-phenylenediamine, subsequent coupling withdesired amino acids by the standard Fmoc protocol, and oxidationof the intermediate para-aminoanilides (pAA) with Oxone®. This procedure allows easy assembly of the desired para-aminoanilides (pAA) on standard resin and efficient oxidation and purification of the corresponding para-nitroanilides (pNA). The method allows easy access to any desired peptide para-nitroanilides, which are useful substrates for the characterization and study of proteolytic enzymes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1013016323676
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  • 5
    Electronic Resource
    Electronic Resource
    Metabolic oxidation of methaqualone in extensive and poor metabolisers of debrisoquine (1982)
    Springer
    European journal of clinical pharmacology 23 (1982), S. 147-150 
    Details
    ISSN: 1432-1041
    Keywords: methaqualone ; debrisoquine ; pharmacogenetics ; metabolism ; oxidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The metabolism of methaqualone to the glucuronides of 5 C-monohydroxy metabolites and to the N-oxide has been studied in 2 groups of healthy young adults phenotyped as extensive and poor metabolisers of debrisoquine. No significant interphenotype differences were observed with respect to the excretion of any of the 6 metabolites. It is probable that the genetic regulation of the pathways leading to these metabolites is at a locus other than that which is responsible for the regulation of the oxidation of debrisoquine, guanoxan, phenacetin, phenytoin and sparteine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00545969
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  • 6
    Electronic Resource
    Electronic Resource
    Oxidation of Fe-C alloys in the temperature range 600–850°C (1981)
    Springer
    Oxidation of metals 16 (1981), S. 339-353 
    Details
    ISSN: 1573-4889
    Keywords: Iron-carbon ; oxidation ; decarburization
    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 Fe-C alloys in the temperature range 600–850°C has been studied. CO 2 evolved during oxidation was measured using an infrared gas analyzer. The presence of C lowers the oxidation rate relative to that of pure Fe and this has been related to the rejection of carbon at the alloy-scale interface causing poor contact between scale and alloy. As a result, the scale contains a higher proportion of magnetite, which reduces its overall growth rate. Very little carbon is lost to the atmosphere. The ease with which the rejected carbon is incorporated into the alloy depends on the alloy structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00611348
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  • 7
    Electronic Resource
    Electronic Resource
    ESCA study of oxidation and hot corrosion of nickel-base superalloys (1980)
    Springer
    Oxidation of metals 14 (1980), S. 415-435 
    Details
    ISSN: 1573-4889
    Keywords: oxidation ; hot corrosion ; ESCA ; superalloys ; sodium sulfate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A study of the high-temperature oxidation and Na2SO4-induced hot corrosion of some nickel-base superalloys has been accomplished by using ESCA to determine the surface composition of the oxidized or corroded samples. Oxidation was carried out at 900 or 1000°C in slowly flowing O2 for samples of B-1900, NASA-TRW VIA, 713C, and IN-738. Oxidation times ranged from 0.5 to 100 hr. Hot corrosion of B-1900 was induced by applying a coating of Na2SO2 to preoxidized samples, then heating to 900° C in slowly flowing O2. Corrosion times ranged from 5 min to 29 hr. For oxidized samples, the predominant type of scale formed by each superalloy was readily determined, and a marked surface enrichment of Ti was found in each case. For corroded samples, the transfer of significant amounts of material from the oxide layer to the surface of the salt layer was observed to occur long before the onset of rapidly accelerating weight gain. Some marked changes in surface composition were observed to coincide with the beginning of accelerating corrosion, the most striking of which were a tenfold decrease in the sulfur to sodium ratio and an increase in the Cr(VI) to Cr(III) ratio.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00603610
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  • 8
    Electronic Resource
    Electronic Resource
    Influence of small Pt additions on Al2O3 scale adherence (1980)
    Springer
    Oxidation of metals 14 (1980), S. 517-530 
    Details
    ISSN: 1573-4889
    Keywords: CoCrAl ; oxidation ; oxide-scale adherence ; platinum ; rare-earth effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The effects of small Pt additions (1 or 3 wt.%) on the oxidation behavior of Co-10Cr-11Al and a similar alloy containing Hf have been studied. An intermetallic phase was present in the alloy containing Hf and Pt but not in that containing Pt alone. The size and distribution of the intermetallic was comparable to that of similar alloys containing oxide dispersions produced by a controlled internal oxidation treatment. As a consequence it promoted the formation of inwardly growing Al2O3 pegs that helped key the surface scale to the substrate and improve the scale-metal adhesion in both isothermal and cyclic oxidation tests. The improvement in overall oxidation resistance relative to an addition-free alloy was considerable, and similar to that of the best oxide dispersion-containing alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00603477
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  • 9
    Electronic Resource
    Electronic Resource
    High-Temperature Oxidation of Ti0.3Al0.2N0.5 Thin Films Deposited on a Steel Substrate by Ion Plating (2000)
    Springer
    Oxidation of metals 53 (2000), S. 529-537 
    Details
    ISSN: 1573-4889
    Keywords: ion plating ; steel ; TiAlN coating ; oxidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract To improve the high-temperature oxidation resistance of STD61 steels used ashot dies or cutting tools, Ti0.3Al0.2N0.5films were deposited on STD61 steel substrates by arc-ion plating. Thedeposited film consisted of Ti3Al2N2 andTi2N phases. The oxidation characteristics were studied attemperatures ranging from 700 to 900°C in air. The deposited STD61steels displayed excellent oxidation resistance up to 800°C, butexhibited large weight gains and breakaway oxidation at 900°C. Theoxidation products were primarily Fe2O3, TiO, TiO2,and α-Al2O3, the relative amount of each oxidebeing dependent on the oxidation condition. Among various oxides, TiO2and α-Al2O3 were the major oxides at 800°Cfor at least up to 16 hr. However, at a higher temperature or a longeroxidation period, the significant outward diffusion of iron from thesubstrate resulted in the formation of iron oxides, together with otheroxides of Ti and Al.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004685010393
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  • 10
    Electronic Resource
    Electronic Resource
    The Effects of Surface-Applied Oxide Films Containing Varying Amounts of Yttria, Chromia, or Alumina on the High-Temperature Oxidation Behavior of Chromia-Forming and Alumina-Forming Alloys (2000)
    Springer
    Oxidation of metals 53 (2000), S. 507-527 
    Details
    ISSN: 1573-4889
    Keywords: oxidation ; chromia ; alumina ; thin oxide films ; reactive element
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In order to study the effects on oxidation behavior of changing thecomposition of oxide scales without changing the composition of theunderlying alloys, thin films, which contained various amounts of Y2O3,Cr2O3, or Al2O3 have been deposited on Fe–25%Cr andFe–25%Cr–5%Al prior to oxidation. There were major differencesbetween the (Fe–25%Cr)–(Cr2O3–Y2O3) and(Fe–25%Cr–5%Al)–(Al2O3–Y2O3) systems. A film ofCr2O3 on Fe–25%Cr reduced the oxidation rate and Cr2O3–Y2O3films reduced it still further. A film of Al2O3 onFe–25%Cr–5%Al reduced the rate considerably, butAl2O3–Y2O3 films exhibited rates that were greater than those forAl2O3 alone. A film, which consisted entirely of Y2O3, greatly decreasedthe oxidation rate of Fe–25%Cr, but increased that ofFe–25%Cr–5%Al. The changes in oxidation rate produced byY2O3 in the (Fe–25%Cr)–(Cr2O3–Y2O3) system weremuch greater than those produced in the(Fe–25%Cr–5%Al)–(Al2O3–Y2O3) system. As far asoxidation rate is concerned, the optimum amount of Y2O3 in the(Fe–25%Cr)–(Cr2O3–Y2O3) system was found to begreater than or equal to 40% and less than 100%; in theFe–25%Cr–5%Al)–(Al2O3–Y2O3) systemit was approximately 10%. In thermal-cycling tests, the resultsfor the (Fe–25%Cr)–(Cr2O3–Y2O3) system followedthe same pattern as that for the isothermal tests; a film of Y2O3reduced the oxidation rate and a film of Cr2O3–33%Y2O3reduced it still further.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004633026323
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